./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/brs5.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 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:10:21,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:10:21,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:10:21,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:10:21,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:10:21,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:10:21,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:10:21,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:10:21,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:10:21,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:10:21,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:10:21,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:10:21,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:10:21,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:10:21,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:10:21,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:10:21,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:10:21,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:10:21,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:10:21,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:10:21,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:10:21,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:10:21,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:10:21,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:10:21,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:10:21,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:10:21,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:10:21,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:10:21,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:10:21,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:10:21,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:10:21,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:10:21,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:10:21,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:10:21,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:10:21,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:10:21,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:10:21,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:10:21,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:10:21,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:10:21,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:10:21,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:10:21,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:10:21,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:10:21,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:10:21,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:10:21,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:10:21,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:10:21,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:10:21,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:10:21,902 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:10:21,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:10:21,903 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:10:21,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:10:21,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:10:21,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:10:21,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:10:21,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:10:21,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:10:21,904 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:10:21,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:10:21,904 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:10:21,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:10:21,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:10:21,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:10:21,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:10:21,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:10:21,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:10:21,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:10:21,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:10:21,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:10:21,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:10:21,906 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:10:21,907 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:10:21,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:10:21,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:10:21,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 [2021-12-21 10:10:22,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:10:22,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:10:22,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:10:22,135 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:10:22,136 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:10:22,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs5.c [2021-12-21 10:10:22,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e707541/8422bb8acedf49269a9cad79a91ecb32/FLAG491b43837 [2021-12-21 10:10:22,542 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:10:22,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c [2021-12-21 10:10:22,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e707541/8422bb8acedf49269a9cad79a91ecb32/FLAG491b43837 [2021-12-21 10:10:22,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e707541/8422bb8acedf49269a9cad79a91ecb32 [2021-12-21 10:10:22,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:10:22,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:10:22,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:10:22,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:10:22,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:10:22,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d479701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22, skipping insertion in model container [2021-12-21 10:10:22,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:10:22,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:10:22,658 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c[587,600] [2021-12-21 10:10:22,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:10:22,688 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:10:22,696 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c[587,600] [2021-12-21 10:10:22,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:10:22,725 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:10:22,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22 WrapperNode [2021-12-21 10:10:22,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:10:22,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:10:22,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:10:22,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:10:22,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,750 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-12-21 10:10:22,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:10:22,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:10:22,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:10:22,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:10:22,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:10:22,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:10:22,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:10:22,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:10:22,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (1/1) ... [2021-12-21 10:10:22,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:10:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:22,803 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) [2021-12-21 10:10:22,822 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 [2021-12-21 10:10:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:10:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:10:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:10:22,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:10:22,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 10:10:22,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:10:22,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:10:22,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:10:22,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:10:22,889 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:10:22,890 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:10:22,990 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:10:22,994 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:10:22,995 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 10:10:22,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:22 BoogieIcfgContainer [2021-12-21 10:10:22,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:10:22,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:10:22,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:10:23,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:10:23,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:10:22" (1/3) ... [2021-12-21 10:10:23,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8df5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:23, skipping insertion in model container [2021-12-21 10:10:23,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:22" (2/3) ... [2021-12-21 10:10:23,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8df5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:23, skipping insertion in model container [2021-12-21 10:10:23,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:22" (3/3) ... [2021-12-21 10:10:23,006 INFO L111 eAbstractionObserver]: Analyzing ICFG brs5.c [2021-12-21 10:10:23,009 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:10:23,010 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:10:23,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:10:23,060 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 [2021-12-21 10:10:23,060 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:10:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 10:10:23,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:23,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:23,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2021-12-21 10:10:23,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:23,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866324610] [2021-12-21 10:10:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:23,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:23,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:23,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866324610] [2021-12-21 10:10:23,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866324610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:10:23,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:10:23,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:10:23,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683467804] [2021-12-21 10:10:23,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:10:23,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:10:23,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:23,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:10:23,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:10:23,218 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-21 10:10:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:23,227 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-12-21 10:10:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:10:23,229 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2021-12-21 10:10:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:23,234 INFO L225 Difference]: With dead ends: 36 [2021-12-21 10:10:23,234 INFO L226 Difference]: Without dead ends: 16 [2021-12-21 10:10:23,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:10:23,240 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:23,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:10:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-21 10:10:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-21 10:10:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-12-21 10:10:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-21 10:10:23,276 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-12-21 10:10:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:23,277 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-21 10:10:23,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-21 10:10:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-21 10:10:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 10:10:23,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:23,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:23,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:10:23,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:23,284 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2021-12-21 10:10:23,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:23,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554899303] [2021-12-21 10:10:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:23,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:23,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:23,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554899303] [2021-12-21 10:10:23,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554899303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:10:23,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:10:23,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:10:23,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576741516] [2021-12-21 10:10:23,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:10:23,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:10:23,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:10:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:10:23,411 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-12-21 10:10:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:23,467 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-12-21 10:10:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:10:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2021-12-21 10:10:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:23,468 INFO L225 Difference]: With dead ends: 33 [2021-12-21 10:10:23,468 INFO L226 Difference]: Without dead ends: 22 [2021-12-21 10:10:23,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:10:23,473 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:23,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:10:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-21 10:10:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-21 10:10:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2021-12-21 10:10:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-21 10:10:23,483 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-12-21 10:10:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:23,484 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-21 10:10:23,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-12-21 10:10:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-21 10:10:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 10:10:23,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:23,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:23,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:10:23,493 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2021-12-21 10:10:23,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518207581] [2021-12-21 10:10:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:23,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:10:23,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:23,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518207581] [2021-12-21 10:10:23,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518207581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:10:23,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:10:23,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:10:23,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493964904] [2021-12-21 10:10:23,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:10:23,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:10:23,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:23,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:10:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:10:23,569 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2021-12-21 10:10:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:23,618 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-21 10:10:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:10:23,618 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 17 [2021-12-21 10:10:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:23,620 INFO L225 Difference]: With dead ends: 27 [2021-12-21 10:10:23,620 INFO L226 Difference]: Without dead ends: 23 [2021-12-21 10:10:23,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:10:23,625 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:23,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:10:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-21 10:10:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-21 10:10:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-21 10:10:23,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-12-21 10:10:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:23,632 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-21 10:10:23,632 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) [2021-12-21 10:10:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-21 10:10:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 10:10:23,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:23,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:23,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:10:23,634 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:23,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2021-12-21 10:10:23,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:23,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868211781] [2021-12-21 10:10:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:23,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:23,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:23,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868211781] [2021-12-21 10:10:23,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868211781] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:23,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222794146] [2021-12-21 10:10:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:23,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:23,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:23,715 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) [2021-12-21 10:10:23,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:10:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:23,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:10:23,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:23,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:23,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222794146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:23,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:23,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 10:10:23,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938241909] [2021-12-21 10:10:23,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:23,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:10:23,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:10:23,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:10:23,960 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-12-21 10:10:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:24,062 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-21 10:10:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:10:24,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 10:10:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:24,064 INFO L225 Difference]: With dead ends: 43 [2021-12-21 10:10:24,064 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 10:10:24,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:10:24,071 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:24,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:10:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 10:10:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-12-21 10:10:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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) [2021-12-21 10:10:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-21 10:10:24,080 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2021-12-21 10:10:24,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:24,080 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-21 10:10:24,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-12-21 10:10:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-21 10:10:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 10:10:24,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:24,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:24,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:10:24,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:24,296 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2021-12-21 10:10:24,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:24,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519977085] [2021-12-21 10:10:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:24,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:24,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:24,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519977085] [2021-12-21 10:10:24,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519977085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:24,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591746083] [2021-12-21 10:10:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:24,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:24,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:24,638 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) [2021-12-21 10:10:24,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:10:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:24,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 10:10:24,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:24,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:10:24,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-21 10:10:24,886 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 29 treesize of output 28 [2021-12-21 10:10:24,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2021-12-21 10:10:25,041 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 0 case distinctions, treesize of input 26 treesize of output 10 [2021-12-21 10:10:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:25,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:32,589 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 222 treesize of output 210 [2021-12-21 10:10:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:32,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591746083] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:32,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:32,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2021-12-21 10:10:32,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467664159] [2021-12-21 10:10:32,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:32,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 10:10:32,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:32,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 10:10:32,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=572, Unknown=7, NotChecked=0, Total=702 [2021-12-21 10:10:32,908 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 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) [2021-12-21 10:10:33,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:33,125 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-12-21 10:10:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 10:10:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 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 [2021-12-21 10:10:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:33,127 INFO L225 Difference]: With dead ends: 58 [2021-12-21 10:10:33,127 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 10:10:33,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=184, Invalid=739, Unknown=7, NotChecked=0, Total=930 [2021-12-21 10:10:33,128 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:33,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 54 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 147 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-12-21 10:10:33,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 10:10:33,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-12-21 10:10:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-21 10:10:33,133 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 23 [2021-12-21 10:10:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:33,133 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-21 10:10:33,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 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) [2021-12-21 10:10:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-21 10:10:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 10:10:33,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:33,134 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:33,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:10:33,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:33,334 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2021-12-21 10:10:33,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:33,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863628098] [2021-12-21 10:10:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:33,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:33,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:33,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863628098] [2021-12-21 10:10:33,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863628098] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:33,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41823677] [2021-12-21 10:10:33,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:10:33,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:33,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:33,419 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) [2021-12-21 10:10:33,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:10:33,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:10:33,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:10:33,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:10:33,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:33,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:33,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41823677] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:33,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:33,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:10:33,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227001051] [2021-12-21 10:10:33,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:33,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:10:33,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:33,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:10:33,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:10:33,594 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:33,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:33,733 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-12-21 10:10:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 10:10:33,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-21 10:10:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:33,734 INFO L225 Difference]: With dead ends: 78 [2021-12-21 10:10:33,734 INFO L226 Difference]: Without dead ends: 55 [2021-12-21 10:10:33,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-21 10:10:33,734 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:33,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 32 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:10:33,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-21 10:10:33,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2021-12-21 10:10:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 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) [2021-12-21 10:10:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-21 10:10:33,738 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 26 [2021-12-21 10:10:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:33,739 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-21 10:10:33,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-21 10:10:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 10:10:33,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:33,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:33,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:10:33,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:33,940 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash 719394766, now seen corresponding path program 3 times [2021-12-21 10:10:33,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:33,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930051242] [2021-12-21 10:10:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:33,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:34,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:34,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930051242] [2021-12-21 10:10:34,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930051242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:34,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947543926] [2021-12-21 10:10:34,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:10:34,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:34,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:34,006 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) [2021-12-21 10:10:34,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:10:34,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 10:10:34,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:10:34,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 10:10:34,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:34,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 10:10:34,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 10:10:34,329 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 23 treesize of output 22 [2021-12-21 10:10:34,465 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 10:10:34,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2021-12-21 10:10:34,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:10:34,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-12-21 10:10:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:10:34,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:36,444 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 100 treesize of output 94 [2021-12-21 10:10:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:10:36,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947543926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:36,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:36,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 14] total 34 [2021-12-21 10:10:36,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658275720] [2021-12-21 10:10:36,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:36,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-21 10:10:36,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:36,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-21 10:10:36,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=908, Unknown=1, NotChecked=0, Total=1122 [2021-12-21 10:10:36,514 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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) [2021-12-21 10:10:37,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:37,034 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-12-21 10:10:37,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 10:10:37,034 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-21 10:10:37,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:37,035 INFO L225 Difference]: With dead ends: 63 [2021-12-21 10:10:37,035 INFO L226 Difference]: Without dead ends: 51 [2021-12-21 10:10:37,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=507, Invalid=2144, Unknown=1, NotChecked=0, Total=2652 [2021-12-21 10:10:37,036 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:37,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 59 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 166 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2021-12-21 10:10:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-21 10:10:37,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2021-12-21 10:10:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-21 10:10:37,040 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2021-12-21 10:10:37,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:37,041 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-21 10:10:37,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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) [2021-12-21 10:10:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-21 10:10:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 10:10:37,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:37,042 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:37,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:10:37,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:37,246 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:37,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:37,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1198950171, now seen corresponding path program 4 times [2021-12-21 10:10:37,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:37,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568413676] [2021-12-21 10:10:37,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:37,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:37,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:37,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568413676] [2021-12-21 10:10:37,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568413676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:37,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874101138] [2021-12-21 10:10:37,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:10:37,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:37,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:37,786 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) [2021-12-21 10:10:37,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:10:37,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:10:37,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:10:37,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 10:10:37,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:37,885 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 15 treesize of output 11 [2021-12-21 10:10:37,988 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-21 10:10:37,989 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 [2021-12-21 10:10:38,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:38,090 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 10:10:38,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-21 10:10:38,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:38,201 INFO L353 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-12-21 10:10:38,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2021-12-21 10:10:38,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:38,301 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 10:10:38,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2021-12-21 10:10:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:38,453 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 10:10:38,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 15 [2021-12-21 10:10:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:38,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:41,464 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_179 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_183 Int) (v_ArrVal_182 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_179)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_179 0)) (not (<= v_ArrVal_183 (+ v_ArrVal_182 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_182)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_182 0)) (<= (+ v_ArrVal_183 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_183)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* c_~N~0 5)))))) is different from false [2021-12-21 10:10:43,569 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (forall ((v_ArrVal_179 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_183 Int) (v_ArrVal_182 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_179)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_179 0)) (<= (+ v_ArrVal_183 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_183)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* 5 ~N~0)) (not (<= v_ArrVal_183 (+ v_ArrVal_182 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_182)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_182 0)))))) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false [2021-12-21 10:10:45,191 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_179 Int) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_183 Int) (v_ArrVal_182 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_179)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (<= (+ v_ArrVal_183 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_183)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* 5 ~N~0)) (not (<= v_ArrVal_179 0)) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)) (not (<= v_ArrVal_183 (+ v_ArrVal_182 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_182)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_182 0)))))) is different from false [2021-12-21 10:10:45,213 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 10:10:45,213 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 2056 treesize of output 2002 [2021-12-21 10:10:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-12-21 10:10:45,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874101138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:45,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:45,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 44 [2021-12-21 10:10:45,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799549249] [2021-12-21 10:10:45,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:45,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-21 10:10:45,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:45,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-21 10:10:45,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1441, Unknown=5, NotChecked=240, Total=1892 [2021-12-21 10:10:45,594 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 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) [2021-12-21 10:10:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:46,680 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-12-21 10:10:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 10:10:46,680 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 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 [2021-12-21 10:10:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:46,681 INFO L225 Difference]: With dead ends: 75 [2021-12-21 10:10:46,681 INFO L226 Difference]: Without dead ends: 46 [2021-12-21 10:10:46,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=478, Invalid=3069, Unknown=5, NotChecked=354, Total=3906 [2021-12-21 10:10:46,682 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:46,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 96 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 494 Invalid, 0 Unknown, 245 Unchecked, 0.3s Time] [2021-12-21 10:10:46,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-21 10:10:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-12-21 10:10:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-12-21 10:10:46,686 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 29 [2021-12-21 10:10:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:46,686 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-12-21 10:10:46,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 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) [2021-12-21 10:10:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-12-21 10:10:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 10:10:46,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:46,687 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:46,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:10:46,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:46,898 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:46,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1722173266, now seen corresponding path program 5 times [2021-12-21 10:10:46,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:46,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612119217] [2021-12-21 10:10:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:46,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:46,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:46,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612119217] [2021-12-21 10:10:46,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612119217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:46,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364064414] [2021-12-21 10:10:46,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:10:46,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:46,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:46,983 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) [2021-12-21 10:10:46,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:10:47,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-21 10:10:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:10:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:10:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:47,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:47,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364064414] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:47,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:47,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-21 10:10:47,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459556804] [2021-12-21 10:10:47,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:47,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:10:47,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:47,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:10:47,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:10:47,203 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2021-12-21 10:10:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:47,402 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-12-21 10:10:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 10:10:47,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 [2021-12-21 10:10:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:47,403 INFO L225 Difference]: With dead ends: 102 [2021-12-21 10:10:47,403 INFO L226 Difference]: Without dead ends: 62 [2021-12-21 10:10:47,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-12-21 10:10:47,403 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:47,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 43 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:10:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-21 10:10:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-12-21 10:10:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 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) [2021-12-21 10:10:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-21 10:10:47,409 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 32 [2021-12-21 10:10:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:47,409 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-21 10:10:47,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2021-12-21 10:10:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-21 10:10:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:10:47,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:47,410 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:47,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:10:47,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:47,619 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:47,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:47,620 INFO L85 PathProgramCache]: Analyzing trace with hash 456261758, now seen corresponding path program 6 times [2021-12-21 10:10:47,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:47,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195207971] [2021-12-21 10:10:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:47,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:48,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:48,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195207971] [2021-12-21 10:10:48,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195207971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:48,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734528442] [2021-12-21 10:10:48,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 10:10:48,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:48,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:48,388 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) [2021-12-21 10:10:48,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:10:48,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-21 10:10:48,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:10:48,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-21 10:10:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:48,547 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 15 treesize of output 11 [2021-12-21 10:10:48,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:48,628 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 25 treesize of output 24 [2021-12-21 10:10:48,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:48,744 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 0 case distinctions, treesize of input 32 treesize of output 34 [2021-12-21 10:10:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:48,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:48,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-12-21 10:10:49,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:10:49,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:49,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:49,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:49,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:49,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2021-12-21 10:10:49,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:49,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:49,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:49,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:10:49,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:49,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 54 [2021-12-21 10:10:49,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:49,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2021-12-21 10:10:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:49,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2021-12-21 10:10:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:49,423 INFO L328 TraceCheckSpWp]: Computing backward predicates...