./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/nla-digbench-scaling/hard-u_valuebound2.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 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 02:56:15,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 02:56:15,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 02:56:15,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 02:56:15,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 02:56:15,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 02:56:15,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 02:56:15,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 02:56:15,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 02:56:15,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 02:56:15,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 02:56:15,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 02:56:15,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 02:56:15,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 02:56:15,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 02:56:15,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 02:56:15,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 02:56:15,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 02:56:15,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 02:56:15,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 02:56:15,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 02:56:15,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 02:56:15,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 02:56:15,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 02:56:15,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 02:56:15,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 02:56:15,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 02:56:15,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 02:56:15,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 02:56:15,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 02:56:15,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 02:56:15,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 02:56:15,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 02:56:15,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 02:56:15,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 02:56:15,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 02:56:15,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 02:56:15,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 02:56:15,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 02:56:15,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 02:56:15,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 02:56:15,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 02:56:15,160 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 02:56:15,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 02:56:15,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 02:56:15,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 02:56:15,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 02:56:15,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 02:56:15,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 02:56:15,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 02:56:15,167 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 02:56:15,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 02:56:15,168 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 02:56:15,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 02:56:15,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 02:56:15,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 02:56:15,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 02:56:15,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 02:56:15,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 02:56:15,169 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 02:56:15,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 02:56:15,169 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 02:56:15,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 02:56:15,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 02:56:15,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 02:56:15,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 02:56:15,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:56:15,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 02:56:15,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 02:56:15,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 02:56:15,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 02:56:15,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 02:56:15,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 02:56:15,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 02:56:15,171 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 02:56:15,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 02:56:15,172 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 02:56:15,172 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3969c56ba3ed63965cbeb782ee88e7216b6985c490408396983bf5f457467675 [2023-02-18 02:56:15,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 02:56:15,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 02:56:15,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 02:56:15,367 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 02:56:15,368 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 02:56:15,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2023-02-18 02:56:16,357 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 02:56:16,500 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 02:56:16,501 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c [2023-02-18 02:56:16,506 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde79be9c/7267219fc3ec48f0aea5e3e70f249f65/FLAGc4d2dcff6 [2023-02-18 02:56:16,519 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde79be9c/7267219fc3ec48f0aea5e3e70f249f65 [2023-02-18 02:56:16,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 02:56:16,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 02:56:16,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 02:56:16,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 02:56:16,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 02:56:16,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f7fb506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16, skipping insertion in model container [2023-02-18 02:56:16,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 02:56:16,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 02:56:16,649 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c[537,550] [2023-02-18 02:56:16,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:56:16,679 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 02:56:16,691 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound2.c[537,550] [2023-02-18 02:56:16,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 02:56:16,704 INFO L208 MainTranslator]: Completed translation [2023-02-18 02:56:16,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16 WrapperNode [2023-02-18 02:56:16,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 02:56:16,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 02:56:16,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 02:56:16,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 02:56:16,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,738 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-02-18 02:56:16,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 02:56:16,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 02:56:16,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 02:56:16,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 02:56:16,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,757 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 02:56:16,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 02:56:16,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 02:56:16,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 02:56:16,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (1/1) ... [2023-02-18 02:56:16,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 02:56:16,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:16,787 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) [2023-02-18 02:56:16,802 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 [2023-02-18 02:56:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 02:56:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 02:56:16,816 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 02:56:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 02:56:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 02:56:16,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 02:56:16,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 02:56:16,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 02:56:16,859 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 02:56:16,860 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 02:56:16,960 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 02:56:16,964 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 02:56:16,964 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 02:56:16,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:56:16 BoogieIcfgContainer [2023-02-18 02:56:16,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 02:56:16,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 02:56:16,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 02:56:16,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 02:56:16,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 02:56:16" (1/3) ... [2023-02-18 02:56:16,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6b6c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:56:16, skipping insertion in model container [2023-02-18 02:56:16,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 02:56:16" (2/3) ... [2023-02-18 02:56:16,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6b6c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 02:56:16, skipping insertion in model container [2023-02-18 02:56:16,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 02:56:16" (3/3) ... [2023-02-18 02:56:16,970 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound2.c [2023-02-18 02:56:16,987 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 02:56:16,987 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 02:56:17,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 02:56:17,019 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@62bb5d5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 02:56:17,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 02:56:17,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 02:56:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 02:56:17,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:17,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:17,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2023-02-18 02:56:17,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:17,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182238617] [2023-02-18 02:56:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:17,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 02:56:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 02:56:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 02:56:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 02:56:17,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:17,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182238617] [2023-02-18 02:56:17,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182238617] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:56:17,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:56:17,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 02:56:17,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515721926] [2023-02-18 02:56:17,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:56:17,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 02:56:17,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 02:56:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:56:17,206 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 02:56:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:17,221 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2023-02-18 02:56:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 02:56:17,222 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-02-18 02:56:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:17,227 INFO L225 Difference]: With dead ends: 63 [2023-02-18 02:56:17,227 INFO L226 Difference]: Without dead ends: 29 [2023-02-18 02:56:17,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 02:56:17,231 INFO L413 NwaCegarLoop]: 43 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, 43 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 [2023-02-18 02:56:17,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:56:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-18 02:56:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-18 02:56:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 02:56:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-02-18 02:56:17,255 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2023-02-18 02:56:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:17,255 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-02-18 02:56:17,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 02:56:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-02-18 02:56:17,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 02:56:17,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:17,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:17,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 02:56:17,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2023-02-18 02:56:17,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:17,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340207906] [2023-02-18 02:56:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:17,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 02:56:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 02:56:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 02:56:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 02:56:17,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:17,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340207906] [2023-02-18 02:56:17,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340207906] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:56:17,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:56:17,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 02:56:17,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950105652] [2023-02-18 02:56:17,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:56:17,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:56:17,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:56:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 02:56:17,481 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 02:56:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:17,544 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-18 02:56:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:56:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-02-18 02:56:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:17,549 INFO L225 Difference]: With dead ends: 42 [2023-02-18 02:56:17,549 INFO L226 Difference]: Without dead ends: 40 [2023-02-18 02:56:17,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 02:56:17,550 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:17,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 02:56:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-18 02:56:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-18 02:56:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 02:56:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-18 02:56:17,562 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2023-02-18 02:56:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:17,563 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-18 02:56:17,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 02:56:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-18 02:56:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 02:56:17,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:17,564 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:17,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 02:56:17,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:17,565 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2023-02-18 02:56:17,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:17,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070486180] [2023-02-18 02:56:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:17,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 02:56:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 02:56:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-18 02:56:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 02:56:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 02:56:17,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:17,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070486180] [2023-02-18 02:56:17,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070486180] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:56:17,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:56:17,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 02:56:17,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189267212] [2023-02-18 02:56:17,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:56:17,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 02:56:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 02:56:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 02:56:17,814 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:56:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:17,894 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-02-18 02:56:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 02:56:17,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-18 02:56:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:17,895 INFO L225 Difference]: With dead ends: 46 [2023-02-18 02:56:17,897 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 02:56:17,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 02:56:17,898 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:17,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 02:56:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 02:56:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-02-18 02:56:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 02:56:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-02-18 02:56:17,910 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2023-02-18 02:56:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:17,911 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-02-18 02:56:17,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 02:56:17,912 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-02-18 02:56:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 02:56:17,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:17,913 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:17,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 02:56:17,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:17,914 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2023-02-18 02:56:17,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:17,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829805287] [2023-02-18 02:56:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:17,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:17,923 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:56:17,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208593406] [2023-02-18 02:56:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:17,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:17,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:17,927 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) [2023-02-18 02:56:17,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 02:56:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:17,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 02:56:17,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:56:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 02:56:18,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:56:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 02:56:18,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:18,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829805287] [2023-02-18 02:56:18,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:56:18,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208593406] [2023-02-18 02:56:18,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208593406] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:56:18,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:56:18,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-18 02:56:18,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973444555] [2023-02-18 02:56:18,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:56:18,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 02:56:18,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:18,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 02:56:18,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-18 02:56:18,194 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-18 02:56:20,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:22,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:24,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:25,249 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2023-02-18 02:56:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 02:56:25,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 34 [2023-02-18 02:56:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:25,251 INFO L225 Difference]: With dead ends: 76 [2023-02-18 02:56:25,252 INFO L226 Difference]: Without dead ends: 62 [2023-02-18 02:56:25,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-18 02:56:25,253 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:25,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 164 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 254 Invalid, 3 Unknown, 0 Unchecked, 7.0s Time] [2023-02-18 02:56:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-18 02:56:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-02-18 02:56:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 38 states have internal predecessors, (39), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-18 02:56:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-02-18 02:56:25,288 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 34 [2023-02-18 02:56:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:25,288 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-02-18 02:56:25,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-18 02:56:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-02-18 02:56:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 02:56:25,290 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:25,291 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:25,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 02:56:25,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:25,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2023-02-18 02:56:25,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:25,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223853857] [2023-02-18 02:56:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:25,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:25,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:56:25,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712306658] [2023-02-18 02:56:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:25,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:25,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:25,524 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) [2023-02-18 02:56:25,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 02:56:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 02:56:25,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:56:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 02:56:25,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 02:56:25,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:25,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223853857] [2023-02-18 02:56:25,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:56:25,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712306658] [2023-02-18 02:56:25,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712306658] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 02:56:25,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 02:56:25,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 02:56:25,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923312466] [2023-02-18 02:56:25,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 02:56:25,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 02:56:25,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:25,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 02:56:25,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 02:56:25,754 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 02:56:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:26,076 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2023-02-18 02:56:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 02:56:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2023-02-18 02:56:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:26,077 INFO L225 Difference]: With dead ends: 72 [2023-02-18 02:56:26,077 INFO L226 Difference]: Without dead ends: 61 [2023-02-18 02:56:26,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-18 02:56:26,078 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:26,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 147 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 02:56:26,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-18 02:56:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-02-18 02:56:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2023-02-18 02:56:26,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-02-18 02:56:26,098 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 41 [2023-02-18 02:56:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:26,100 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-02-18 02:56:26,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 02:56:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-02-18 02:56:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-18 02:56:26,103 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:26,103 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:26,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 02:56:26,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:26,308 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:26,309 INFO L85 PathProgramCache]: Analyzing trace with hash -421337323, now seen corresponding path program 1 times [2023-02-18 02:56:26,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:26,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166398160] [2023-02-18 02:56:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:26,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:26,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:56:26,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729645518] [2023-02-18 02:56:26,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:26,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:26,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:26,321 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) [2023-02-18 02:56:26,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 02:56:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:26,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 02:56:26,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:56:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 02:56:26,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:56:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 02:56:27,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:27,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166398160] [2023-02-18 02:56:27,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:56:27,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729645518] [2023-02-18 02:56:27,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729645518] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:56:27,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:56:27,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-02-18 02:56:27,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498261087] [2023-02-18 02:56:27,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:56:27,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 02:56:27,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 02:56:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-02-18 02:56:27,683 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-18 02:56:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:29,754 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2023-02-18 02:56:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 02:56:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 58 [2023-02-18 02:56:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:29,756 INFO L225 Difference]: With dead ends: 76 [2023-02-18 02:56:29,756 INFO L226 Difference]: Without dead ends: 74 [2023-02-18 02:56:29,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2023-02-18 02:56:29,757 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:29,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 106 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-18 02:56:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-18 02:56:29,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2023-02-18 02:56:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 47 states have internal predecessors, (48), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 02:56:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2023-02-18 02:56:29,771 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 58 [2023-02-18 02:56:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:29,771 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2023-02-18 02:56:29,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-18 02:56:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2023-02-18 02:56:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 02:56:29,776 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:29,776 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:29,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 02:56:29,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:29,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:29,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1609951834, now seen corresponding path program 1 times [2023-02-18 02:56:29,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:29,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396178751] [2023-02-18 02:56:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:29,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:29,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:56:29,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863757551] [2023-02-18 02:56:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:30,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:30,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:30,005 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) [2023-02-18 02:56:30,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 02:56:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:30,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 02:56:30,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:56:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-18 02:56:43,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 02:56:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-02-18 02:56:44,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 02:56:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396178751] [2023-02-18 02:56:44,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 02:56:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863757551] [2023-02-18 02:56:44,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863757551] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 02:56:44,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 02:56:44,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 18 [2023-02-18 02:56:44,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058587317] [2023-02-18 02:56:44,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 02:56:44,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 02:56:44,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 02:56:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 02:56:44,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-02-18 02:56:44,118 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-18 02:56:50,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 02:56:52,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:54,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-18 02:56:58,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 02:56:58,955 INFO L93 Difference]: Finished difference Result 113 states and 144 transitions. [2023-02-18 02:56:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 02:56:58,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) Word has length 68 [2023-02-18 02:56:58,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 02:56:58,958 INFO L225 Difference]: With dead ends: 113 [2023-02-18 02:56:58,958 INFO L226 Difference]: Without dead ends: 101 [2023-02-18 02:56:58,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-02-18 02:56:58,959 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 75 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2023-02-18 02:56:58,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 183 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 563 Invalid, 1 Unknown, 0 Unchecked, 14.6s Time] [2023-02-18 02:56:58,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-18 02:56:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2023-02-18 02:56:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-02-18 02:56:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2023-02-18 02:56:58,978 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 68 [2023-02-18 02:56:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 02:56:58,979 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2023-02-18 02:56:58,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 9 states have call predecessors, (20), 7 states have call successors, (20) [2023-02-18 02:56:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2023-02-18 02:56:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 02:56:58,980 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 02:56:58,980 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 02:56:58,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 02:56:59,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:59,181 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 02:56:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 02:56:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2023-02-18 02:56:59,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 02:56:59,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620436403] [2023-02-18 02:56:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:59,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 02:56:59,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 02:56:59,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977999791] [2023-02-18 02:56:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 02:56:59,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 02:56:59,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 02:56:59,199 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) [2023-02-18 02:56:59,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 02:56:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 02:56:59,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 02:56:59,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 02:57:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-18 02:57:00,059 INFO L328 TraceCheckSpWp]: Computing backward predicates...