./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/reducercommutativity/sep20-1.i -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 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:41:18,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:41:18,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:41:19,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:41:19,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:41:19,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:41:19,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:41:19,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:41:19,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:41:19,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:41:19,018 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:41:19,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:41:19,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:41:19,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:41:19,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:41:19,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:41:19,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:41:19,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:41:19,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:41:19,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:41:19,026 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:41:19,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:41:19,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:41:19,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:41:19,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:41:19,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:41:19,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:41:19,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:41:19,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:41:19,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:41:19,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:41:19,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:41:19,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:41:19,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:41:19,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:41:19,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:41:19,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:41:19,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:41:19,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:41:19,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:41:19,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:41:19,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:41:19,058 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:41:19,076 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:41:19,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:41:19,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:41:19,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:41:19,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:41:19,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:41:19,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:41:19,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:41:19,079 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:41:19,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:41:19,079 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:41:19,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:41:19,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:41:19,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:41:19,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:41:19,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:41:19,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:41:19,080 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:41:19,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:41:19,081 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:41:19,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:41:19,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:41:19,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:41:19,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:41:19,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:41:19,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:41:19,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:41:19,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:41:19,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:41:19,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:41:19,083 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:41:19,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:41:19,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:41:19,083 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c [2022-07-22 09:41:19,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:41:19,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:41:19,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:41:19,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:41:19,309 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:41:19,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep20-1.i [2022-07-22 09:41:19,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a0bdd18a/d9b43fea4fd44e9f8911a1f73595064e/FLAGe23e79b17 [2022-07-22 09:41:19,725 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:41:19,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep20-1.i [2022-07-22 09:41:19,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a0bdd18a/d9b43fea4fd44e9f8911a1f73595064e/FLAGe23e79b17 [2022-07-22 09:41:20,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a0bdd18a/d9b43fea4fd44e9f8911a1f73595064e [2022-07-22 09:41:20,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:41:20,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:41:20,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:41:20,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:41:20,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:41:20,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3172e84e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20, skipping insertion in model container [2022-07-22 09:41:20,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:41:20,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:41:20,331 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/reducercommutativity/sep20-1.i[1293,1306] [2022-07-22 09:41:20,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:41:20,341 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:41:20,372 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/reducercommutativity/sep20-1.i[1293,1306] [2022-07-22 09:41:20,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:41:20,384 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:41:20,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20 WrapperNode [2022-07-22 09:41:20,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:41:20,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:41:20,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:41:20,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:41:20,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,419 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-22 09:41:20,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:41:20,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:41:20,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:41:20,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:41:20,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:41:20,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:41:20,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:41:20,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:41:20,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (1/1) ... [2022-07-22 09:41:20,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:41:20,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:20,490 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 09:41:20,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 09:41:20,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:41:20,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:41:20,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:41:20,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:41:20,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:41:20,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:41:20,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:41:20,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:41:20,522 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-07-22 09:41:20,522 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-07-22 09:41:20,586 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:41:20,587 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:41:20,733 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:41:20,737 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:41:20,738 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 09:41:20,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:41:20 BoogieIcfgContainer [2022-07-22 09:41:20,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:41:20,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:41:20,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:41:20,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:41:20,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:41:20" (1/3) ... [2022-07-22 09:41:20,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2427ab4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:41:20, skipping insertion in model container [2022-07-22 09:41:20,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:41:20" (2/3) ... [2022-07-22 09:41:20,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2427ab4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:41:20, skipping insertion in model container [2022-07-22 09:41:20,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:41:20" (3/3) ... [2022-07-22 09:41:20,746 INFO L111 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2022-07-22 09:41:20,757 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:41:20,757 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:41:20,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:41:20,799 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1c3473ae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@165eac4e [2022-07-22 09:41:20,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:41:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:41:20,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:20,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:20,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-07-22 09:41:20,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:20,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329589765] [2022-07-22 09:41:20,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:20,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:41:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:20,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 09:41:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:41:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:41:21,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:21,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329589765] [2022-07-22 09:41:21,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329589765] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:41:21,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:41:21,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:41:21,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303541568] [2022-07-22 09:41:21,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:41:21,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:41:21,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:21,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:41:21,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:41:21,047 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:41:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:21,095 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-07-22 09:41:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:41:21,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-22 09:41:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:21,105 INFO L225 Difference]: With dead ends: 52 [2022-07-22 09:41:21,105 INFO L226 Difference]: Without dead ends: 25 [2022-07-22 09:41:21,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:41:21,111 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:21,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-22 09:41:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-22 09:41:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-22 09:41:21,142 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-07-22 09:41:21,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:21,143 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-22 09:41:21,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:41:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-22 09:41:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 09:41:21,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:21,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:21,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:41:21,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-07-22 09:41:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:21,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64103015] [2022-07-22 09:41:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:21,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:41:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 09:41:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:41:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:41:21,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:21,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64103015] [2022-07-22 09:41:21,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64103015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:21,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106354761] [2022-07-22 09:41:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:21,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:21,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:21,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:21,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:41:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:41:21,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 09:41:21,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:41:21,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106354761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:41:21,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:41:21,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 09:41:21,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864852382] [2022-07-22 09:41:21,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:41:21,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:41:21,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:21,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:41:21,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:41:21,304 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:21,311 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-22 09:41:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:41:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-22 09:41:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:21,313 INFO L225 Difference]: With dead ends: 45 [2022-07-22 09:41:21,313 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 09:41:21,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:41:21,314 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:21,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 09:41:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-22 09:41:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-22 09:41:21,318 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-07-22 09:41:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:21,319 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-22 09:41:21,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-22 09:41:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 09:41:21,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:21,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:21,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 09:41:21,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:21,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:21,541 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-07-22 09:41:21,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:21,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575635977] [2022-07-22 09:41:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:21,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:41:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 09:41:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 09:41:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 09:41:21,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:21,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575635977] [2022-07-22 09:41:21,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575635977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:21,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916323445] [2022-07-22 09:41:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:21,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:21,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:21,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:21,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:41:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:41:21,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 09:41:21,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:41:21,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916323445] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:41:21,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:41:21,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 09:41:21,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820786892] [2022-07-22 09:41:21,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:41:21,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:41:21,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:21,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:41:21,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:41:21,724 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:21,732 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-22 09:41:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:41:21,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-22 09:41:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:21,733 INFO L225 Difference]: With dead ends: 41 [2022-07-22 09:41:21,733 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 09:41:21,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:41:21,734 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:21,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 09:41:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-07-22 09:41:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-22 09:41:21,738 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-07-22 09:41:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:21,739 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-22 09:41:21,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:41:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-22 09:41:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 09:41:21,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:21,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-07-22 09:41:21,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:21,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 09:41:21,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:21,950 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-07-22 09:41:21,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:21,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484748499] [2022-07-22 09:41:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:21,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:41:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 09:41:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 09:41:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:41:22,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484748499] [2022-07-22 09:41:22,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484748499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59779766] [2022-07-22 09:41:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:22,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:22,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:22,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:22,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:41:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:41:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:41:22,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 09:41:22,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59779766] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:22,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:22,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-22 09:41:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587900136] [2022-07-22 09:41:22,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:22,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 09:41:22,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:22,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 09:41:22,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 09:41:22,121 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 09:41:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:22,170 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-07-22 09:41:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 09:41:22,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-07-22 09:41:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:22,174 INFO L225 Difference]: With dead ends: 58 [2022-07-22 09:41:22,174 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 09:41:22,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 09:41:22,176 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:22,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 09:41:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-22 09:41:22,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-07-22 09:41:22,184 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-07-22 09:41:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:22,186 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-07-22 09:41:22,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 09:41:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-07-22 09:41:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 09:41:22,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:22,190 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:22,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:22,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:22,410 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:22,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-07-22 09:41:22,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:22,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898260844] [2022-07-22 09:41:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 09:41:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 09:41:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 09:41:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-22 09:41:22,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:22,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898260844] [2022-07-22 09:41:22,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898260844] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:22,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013063575] [2022-07-22 09:41:22,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:41:22,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:22,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:22,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:22,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:41:22,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:41:22,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:22,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 09:41:22,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-22 09:41:22,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-22 09:41:22,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013063575] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:22,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:22,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-22 09:41:22,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380744212] [2022-07-22 09:41:22,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:22,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 09:41:22,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 09:41:22,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:41:22,711 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 09:41:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:22,747 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-07-22 09:41:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:41:22,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-07-22 09:41:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:22,748 INFO L225 Difference]: With dead ends: 74 [2022-07-22 09:41:22,748 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 09:41:22,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:41:22,750 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:22,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 09:41:22,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-22 09:41:22,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-07-22 09:41:22,768 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-07-22 09:41:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:22,768 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-07-22 09:41:22,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 09:41:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-07-22 09:41:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 09:41:22,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:22,770 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:22,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:22,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:22,978 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:22,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-07-22 09:41:22,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:22,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169673649] [2022-07-22 09:41:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:22,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:23,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 09:41:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:23,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 09:41:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 09:41:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 09:41:23,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:23,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169673649] [2022-07-22 09:41:23,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169673649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:23,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297742373] [2022-07-22 09:41:23,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:41:23,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:23,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:23,112 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:23,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:41:23,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 09:41:23,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:23,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:41:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-22 09:41:23,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-22 09:41:23,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297742373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:23,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:23,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-22 09:41:23,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093324652] [2022-07-22 09:41:23,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:23,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 09:41:23,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 09:41:23,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:41:23,251 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:41:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:23,314 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-07-22 09:41:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 09:41:23,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-07-22 09:41:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:23,316 INFO L225 Difference]: With dead ends: 90 [2022-07-22 09:41:23,316 INFO L226 Difference]: Without dead ends: 64 [2022-07-22 09:41:23,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:41:23,317 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:23,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 118 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:41:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-22 09:41:23,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-07-22 09:41:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-07-22 09:41:23,322 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2022-07-22 09:41:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:23,322 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-07-22 09:41:23,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:41:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-07-22 09:41:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-22 09:41:23,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:23,323 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:23,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:23,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:23,538 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2022-07-22 09:41:23,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:23,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675896284] [2022-07-22 09:41:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:23,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:23,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 09:41:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:23,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-22 09:41:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:23,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-22 09:41:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-07-22 09:41:23,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:23,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675896284] [2022-07-22 09:41:23,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675896284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:23,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668824138] [2022-07-22 09:41:23,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:41:23,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:23,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:23,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:23,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:41:23,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:41:23,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 09:41:23,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-07-22 09:41:23,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-07-22 09:41:23,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668824138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:23,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:23,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2022-07-22 09:41:23,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946449122] [2022-07-22 09:41:23,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:23,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 09:41:23,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 09:41:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:41:23,998 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 09:41:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:24,039 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2022-07-22 09:41:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 09:41:24,039 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2022-07-22 09:41:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:24,040 INFO L225 Difference]: With dead ends: 119 [2022-07-22 09:41:24,040 INFO L226 Difference]: Without dead ends: 81 [2022-07-22 09:41:24,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:41:24,041 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:24,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 74 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-22 09:41:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-22 09:41:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-07-22 09:41:24,047 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 108 [2022-07-22 09:41:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:24,047 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-07-22 09:41:24,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 09:41:24,047 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-07-22 09:41:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-22 09:41:24,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:24,048 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:24,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 09:41:24,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:24,267 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:24,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2004558111, now seen corresponding path program 5 times [2022-07-22 09:41:24,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:24,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478939474] [2022-07-22 09:41:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:24,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:24,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:41:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:24,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-22 09:41:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:24,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-22 09:41:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-07-22 09:41:24,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:24,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478939474] [2022-07-22 09:41:24,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478939474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:24,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021178087] [2022-07-22 09:41:24,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:41:24,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:24,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:24,452 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:24,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:41:26,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-22 09:41:26,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:41:26,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2022-07-22 09:41:26,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-07-22 09:41:26,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021178087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:26,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:26,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-22 09:41:26,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068915609] [2022-07-22 09:41:26,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:26,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 09:41:26,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 09:41:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-07-22 09:41:26,143 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 09:41:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:26,173 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-07-22 09:41:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 09:41:26,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2022-07-22 09:41:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:26,175 INFO L225 Difference]: With dead ends: 142 [2022-07-22 09:41:26,175 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 09:41:26,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-07-22 09:41:26,176 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:26,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 09:41:26,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-22 09:41:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-07-22 09:41:26,181 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 126 [2022-07-22 09:41:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:26,182 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-07-22 09:41:26,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 09:41:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-07-22 09:41:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-07-22 09:41:26,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:26,183 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 20, 20, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:26,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:26,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:26,398 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:26,398 INFO L85 PathProgramCache]: Analyzing trace with hash 848751647, now seen corresponding path program 6 times [2022-07-22 09:41:26,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:26,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986881553] [2022-07-22 09:41:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:26,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:26,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:41:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:26,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-22 09:41:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:26,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-07-22 09:41:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1601 trivial. 0 not checked. [2022-07-22 09:41:26,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:26,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986881553] [2022-07-22 09:41:26,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986881553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:26,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472063820] [2022-07-22 09:41:26,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:41:26,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:26,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:26,628 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:26,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:41:26,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 09:41:26,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:26,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:41:26,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2022-07-22 09:41:26,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-07-22 09:41:26,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472063820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:26,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:26,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-07-22 09:41:26,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784629983] [2022-07-22 09:41:26,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:26,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 09:41:26,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:26,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 09:41:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:41:26,819 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:41:26,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:26,879 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2022-07-22 09:41:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 09:41:26,879 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 198 [2022-07-22 09:41:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:26,882 INFO L225 Difference]: With dead ends: 179 [2022-07-22 09:41:26,882 INFO L226 Difference]: Without dead ends: 118 [2022-07-22 09:41:26,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-07-22 09:41:26,884 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:26,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 236 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:26,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-22 09:41:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-07-22 09:41:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2022-07-22 09:41:26,900 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 198 [2022-07-22 09:41:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:26,901 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2022-07-22 09:41:26,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 09:41:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2022-07-22 09:41:26,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-22 09:41:26,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:26,902 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:26,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:27,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 09:41:27,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:27,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:27,104 INFO L85 PathProgramCache]: Analyzing trace with hash -217509715, now seen corresponding path program 7 times [2022-07-22 09:41:27,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:27,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113490857] [2022-07-22 09:41:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:27,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:27,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:41:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:27,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 09:41:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:27,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-07-22 09:41:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2022-07-22 09:41:27,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:27,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113490857] [2022-07-22 09:41:27,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113490857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:27,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311353012] [2022-07-22 09:41:27,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:41:27,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:27,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:27,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:27,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:41:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:27,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 09:41:27,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2022-07-22 09:41:27,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2022-07-22 09:41:27,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311353012] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:27,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:27,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2022-07-22 09:41:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558882024] [2022-07-22 09:41:27,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:27,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:41:27,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:41:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:41:27,634 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 09:41:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:27,676 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2022-07-22 09:41:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 09:41:27,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 215 [2022-07-22 09:41:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:27,677 INFO L225 Difference]: With dead ends: 203 [2022-07-22 09:41:27,677 INFO L226 Difference]: Without dead ends: 131 [2022-07-22 09:41:27,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 431 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:41:27,678 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:27,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 152 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-22 09:41:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-07-22 09:41:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2022-07-22 09:41:27,682 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 215 [2022-07-22 09:41:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:27,683 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2022-07-22 09:41:27,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 09:41:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2022-07-22 09:41:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-22 09:41:27,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:27,685 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:27,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-22 09:41:27,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 09:41:27,903 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:27,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2054059049, now seen corresponding path program 8 times [2022-07-22 09:41:27,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:27,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679926218] [2022-07-22 09:41:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:27,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:41:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-22 09:41:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-22 09:41:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-07-22 09:41:28,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:28,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679926218] [2022-07-22 09:41:28,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679926218] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:28,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121020779] [2022-07-22 09:41:28,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:41:28,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:28,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:28,071 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:28,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:41:28,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:41:28,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:28,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 09:41:28,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 2490 proven. 36 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2022-07-22 09:41:28,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-07-22 09:41:28,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121020779] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:28,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:28,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-22 09:41:28,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756617580] [2022-07-22 09:41:28,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:28,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 09:41:28,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 09:41:28,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:41:28,344 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:41:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:28,374 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2022-07-22 09:41:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 09:41:28,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 260 [2022-07-22 09:41:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:28,375 INFO L225 Difference]: With dead ends: 218 [2022-07-22 09:41:28,375 INFO L226 Difference]: Without dead ends: 147 [2022-07-22 09:41:28,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:41:28,376 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:28,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 95 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-22 09:41:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-07-22 09:41:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 142 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:28,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2022-07-22 09:41:28,381 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 260 [2022-07-22 09:41:28,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:28,381 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2022-07-22 09:41:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:41:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2022-07-22 09:41:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-07-22 09:41:28,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:28,383 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:28,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:28,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 09:41:28,602 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash -371662137, now seen corresponding path program 9 times [2022-07-22 09:41:28,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:28,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105523481] [2022-07-22 09:41:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:28,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:41:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-22 09:41:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-07-22 09:41:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-07-22 09:41:28,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:28,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105523481] [2022-07-22 09:41:28,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105523481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:28,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037466450] [2022-07-22 09:41:28,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:41:28,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:28,890 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:28,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:41:31,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-22 09:41:31,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 09:41:31,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 2490 proven. 196 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2022-07-22 09:41:31,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-07-22 09:41:31,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037466450] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:31,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:31,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-07-22 09:41:31,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829796581] [2022-07-22 09:41:31,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:31,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:41:31,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:41:31,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:41:31,979 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:41:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:32,012 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2022-07-22 09:41:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 09:41:32,012 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 276 [2022-07-22 09:41:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:32,013 INFO L225 Difference]: With dead ends: 228 [2022-07-22 09:41:32,013 INFO L226 Difference]: Without dead ends: 157 [2022-07-22 09:41:32,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 552 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:41:32,014 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:32,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 72 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:41:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-22 09:41:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-07-22 09:41:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:41:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2022-07-22 09:41:32,019 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 276 [2022-07-22 09:41:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:32,019 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2022-07-22 09:41:32,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 09:41:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2022-07-22 09:41:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-22 09:41:32,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:32,021 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:32,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:32,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 09:41:32,243 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:32,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2076360355, now seen corresponding path program 10 times [2022-07-22 09:41:32,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:32,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886465991] [2022-07-22 09:41:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:32,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:34,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:41:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:34,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-22 09:41:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:34,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-07-22 09:41:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 116 proven. 5524 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2022-07-22 09:41:35,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886465991] [2022-07-22 09:41:35,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886465991] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621818526] [2022-07-22 09:41:35,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:41:35,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:35,777 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:35,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:41:38,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:41:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:41:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 148 conjunts are in the unsatisfiable core [2022-07-22 09:41:38,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2022-07-22 09:41:40,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5314 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2022-07-22 09:41:42,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621818526] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:42,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:42,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 30, 31] total 97 [2022-07-22 09:41:42,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824826105] [2022-07-22 09:41:42,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:42,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-22 09:41:42,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-22 09:41:42,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=9011, Unknown=0, NotChecked=0, Total=9312 [2022-07-22 09:41:42,420 INFO L87 Difference]: Start difference. First operand 157 states and 181 transitions. Second operand has 97 states, 95 states have (on average 2.473684210526316) internal successors, (235), 88 states have internal predecessors, (235), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 09:41:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:41:47,756 INFO L93 Difference]: Finished difference Result 902 states and 1308 transitions. [2022-07-22 09:41:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-22 09:41:47,757 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 95 states have (on average 2.473684210526316) internal successors, (235), 88 states have internal predecessors, (235), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 286 [2022-07-22 09:41:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:41:47,765 INFO L225 Difference]: With dead ends: 902 [2022-07-22 09:41:47,765 INFO L226 Difference]: Without dead ends: 898 [2022-07-22 09:41:47,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 558 SyntacticMatches, 8 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2602 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=329, Invalid=9571, Unknown=0, NotChecked=0, Total=9900 [2022-07-22 09:41:47,768 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 198 mSDsluCounter, 6197 mSDsCounter, 0 mSdLazyCounter, 12523 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 6317 SdHoareTripleChecker+Invalid, 12668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 12523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:41:47,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 6317 Invalid, 12668 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [145 Valid, 12523 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-22 09:41:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-07-22 09:41:47,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 584. [2022-07-22 09:41:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 576 states have (on average 1.2864583333333333) internal successors, (741), 577 states have internal predecessors, (741), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-22 09:41:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 755 transitions. [2022-07-22 09:41:47,832 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 755 transitions. Word has length 286 [2022-07-22 09:41:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:41:47,832 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 755 transitions. [2022-07-22 09:41:47,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 95 states have (on average 2.473684210526316) internal successors, (235), 88 states have internal predecessors, (235), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 09:41:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 755 transitions. [2022-07-22 09:41:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-22 09:41:47,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:41:47,836 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:41:47,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 09:41:48,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 09:41:48,052 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:41:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:41:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1396301985, now seen corresponding path program 1 times [2022-07-22 09:41:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:41:48,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843744253] [2022-07-22 09:41:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:41:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:50,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:41:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:50,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-22 09:41:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:50,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-07-22 09:41:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1244 proven. 3639 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2022-07-22 09:41:50,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:41:50,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843744253] [2022-07-22 09:41:50,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843744253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:41:50,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797300754] [2022-07-22 09:41:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:41:50,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:41:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:41:50,985 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:41:50,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 09:41:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:41:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-22 09:41:51,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:41:51,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-07-22 09:41:51,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-22 09:41:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2491 proven. 1872 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2022-07-22 09:41:53,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:41:55,987 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-22 09:41:55,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-22 09:41:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2546 proven. 1815 refuted. 0 times theorem prover too weak. 1905 trivial. 0 not checked. [2022-07-22 09:41:56,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797300754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:41:56,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:41:56,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 32, 30] total 105 [2022-07-22 09:41:56,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24260552] [2022-07-22 09:41:56,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:41:56,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-22 09:41:56,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:41:56,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-22 09:41:56,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=10541, Unknown=0, NotChecked=0, Total=10920 [2022-07-22 09:41:56,063 INFO L87 Difference]: Start difference. First operand 584 states and 755 transitions. Second operand has 105 states, 103 states have (on average 2.8155339805825244) internal successors, (290), 102 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-22 09:42:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:42:03,839 INFO L93 Difference]: Finished difference Result 2351 states and 3197 transitions. [2022-07-22 09:42:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-22 09:42:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 103 states have (on average 2.8155339805825244) internal successors, (290), 102 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2022-07-22 09:42:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:42:03,849 INFO L225 Difference]: With dead ends: 2351 [2022-07-22 09:42:03,849 INFO L226 Difference]: Without dead ends: 1732 [2022-07-22 09:42:03,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 600 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6037 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1296, Invalid=28116, Unknown=0, NotChecked=0, Total=29412 [2022-07-22 09:42:03,861 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 452 mSDsluCounter, 5396 mSDsCounter, 0 mSdLazyCounter, 6699 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 5491 SdHoareTripleChecker+Invalid, 11283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 6699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4453 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:42:03,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 5491 Invalid, 11283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 6699 Invalid, 0 Unknown, 4453 Unchecked, 3.0s Time] [2022-07-22 09:42:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-07-22 09:42:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1643. [2022-07-22 09:42:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1623 states have (on average 1.3351817621688231) internal successors, (2167), 1628 states have internal predecessors, (2167), 11 states have call successors, (11), 3 states have call predecessors, (11), 8 states have return successors, (68), 11 states have call predecessors, (68), 11 states have call successors, (68) [2022-07-22 09:42:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2246 transitions. [2022-07-22 09:42:03,940 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2246 transitions. Word has length 286 [2022-07-22 09:42:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:42:03,941 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 2246 transitions. [2022-07-22 09:42:03,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 103 states have (on average 2.8155339805825244) internal successors, (290), 102 states have internal predecessors, (290), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-22 09:42:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2246 transitions. [2022-07-22 09:42:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-22 09:42:03,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:42:03,953 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:42:03,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 09:42:04,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 09:42:04,173 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:42:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:42:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1818194917, now seen corresponding path program 2 times [2022-07-22 09:42:04,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:42:04,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786316445] [2022-07-22 09:42:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:42:04,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:42:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:06,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:42:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:07,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-22 09:42:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:07,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-07-22 09:42:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4372 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-22 09:42:08,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:42:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786316445] [2022-07-22 09:42:08,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786316445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:42:08,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027594564] [2022-07-22 09:42:08,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:42:08,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:42:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:42:08,049 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:42:08,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 09:42:08,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:42:08,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:42:08,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 277 conjunts are in the unsatisfiable core [2022-07-22 09:42:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:42:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:08,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:08,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 33 [2022-07-22 09:42:10,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,399 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,429 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,469 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,503 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,536 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,576 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,612 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,649 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,686 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,728 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,804 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,845 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,894 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,939 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:10,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:10,985 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:11,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:11,042 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:11,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:11,096 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:11,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:11,145 INFO L390 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 35 treesize of output 28 [2022-07-22 09:42:11,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:11,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:11,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:42:11,261 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-07-22 09:42:11,261 INFO L390 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 56 treesize of output 52 [2022-07-22 09:42:11,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 09:42:11,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:42:11,392 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:42:11,392 INFO L390 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 3 case distinctions, treesize of input 65 treesize of output 58 [2022-07-22 09:42:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 57 proven. 6205 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:42:14,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:42:36,475 INFO L356 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-07-22 09:42:36,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-07-22 09:42:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1337 proven. 3934 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-07-22 09:42:38,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027594564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:42:38,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:42:38,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 110, 86] total 200 [2022-07-22 09:42:38,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075099036] [2022-07-22 09:42:38,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:42:38,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-07-22 09:42:38,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:42:38,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-07-22 09:42:38,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=39010, Unknown=10, NotChecked=0, Total=39800 [2022-07-22 09:42:38,791 INFO L87 Difference]: Start difference. First operand 1643 states and 2246 transitions. Second operand has 200 states, 200 states have (on average 2.36) internal successors, (472), 199 states have internal predecessors, (472), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-22 09:42:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:42:53,526 INFO L93 Difference]: Finished difference Result 4382 states and 6067 transitions. [2022-07-22 09:42:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-07-22 09:42:53,527 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 2.36) internal successors, (472), 199 states have internal predecessors, (472), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 286 [2022-07-22 09:42:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:42:53,543 INFO L225 Difference]: With dead ends: 4382 [2022-07-22 09:42:53,543 INFO L226 Difference]: Without dead ends: 4128 [2022-07-22 09:42:53,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 507 SyntacticMatches, 26 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20555 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=1672, Invalid=68808, Unknown=10, NotChecked=0, Total=70490 [2022-07-22 09:42:53,551 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 395 mSDsluCounter, 14198 mSDsCounter, 0 mSdLazyCounter, 10500 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 14331 SdHoareTripleChecker+Invalid, 25250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 10500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14657 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:42:53,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 14331 Invalid, 25250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 10500 Invalid, 0 Unknown, 14657 Unchecked, 4.7s Time] [2022-07-22 09:42:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2022-07-22 09:42:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 4002. [2022-07-22 09:42:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 3963 states have (on average 1.341912692404744) internal successors, (5318), 3978 states have internal predecessors, (5318), 17 states have call successors, (17), 6 states have call predecessors, (17), 21 states have return successors, (199), 17 states have call predecessors, (199), 17 states have call successors, (199) [2022-07-22 09:42:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5534 transitions. [2022-07-22 09:42:53,772 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5534 transitions. Word has length 286 [2022-07-22 09:42:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:42:53,772 INFO L495 AbstractCegarLoop]: Abstraction has 4002 states and 5534 transitions. [2022-07-22 09:42:53,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 2.36) internal successors, (472), 199 states have internal predecessors, (472), 6 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-22 09:42:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5534 transitions. [2022-07-22 09:42:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-22 09:42:53,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:42:53,794 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:42:53,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 09:42:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:42:54,007 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:42:54,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:42:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash 938743263, now seen corresponding path program 3 times [2022-07-22 09:42:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:42:54,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014813086] [2022-07-22 09:42:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:42:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:42:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:56,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-22 09:42:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:56,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-22 09:42:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:57,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-07-22 09:42:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:42:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2490 proven. 3130 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2022-07-22 09:42:57,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:42:57,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014813086] [2022-07-22 09:42:57,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014813086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:42:57,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612328424] [2022-07-22 09:42:57,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:42:57,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:42:57,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:42:57,708 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:42:57,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 09:43:20,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2022-07-22 09:43:20,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:43:20,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 198 conjunts are in the unsatisfiable core [2022-07-22 09:43:20,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:43:21,636 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:21,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:43:21,713 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:21,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:43:21,791 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:21,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:43:21,876 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:21,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:43:21,955 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:21,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:43:22,037 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:22,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:43:22,119 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:22,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:43:22,202 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:22,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:43:22,289 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:22,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:43:22,374 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:43:22,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-07-22 09:43:22,390 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-22 09:43:22,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-07-22 09:43:22,552 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-22 09:43:22,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-07-22 09:43:22,710 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-22 09:43:22,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-07-22 09:43:22,794 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-22 09:43:22,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-07-22 09:43:22,889 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-22 09:43:22,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-07-22 09:43:22,969 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-22 09:43:22,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-07-22 09:43:23,052 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-22 09:43:23,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-07-22 09:43:23,141 INFO L356 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-07-22 09:43:23,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 52 [2022-07-22 09:43:23,347 INFO L356 Elim1Store]: treesize reduction 99, result has 27.7 percent of original size [2022-07-22 09:43:23,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 67 [2022-07-22 09:43:23,643 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:43:23,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 28 [2022-07-22 09:44:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2284 proven. 2537 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2022-07-22 09:44:06,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:44:33,054 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_181| Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_181| (+ |c_ULTIMATE.start_main_~i~2#1| 1))) (forall ((v_ArrVal_1562 Int) (v_ArrVal_1559 Int)) (<= 0 (let ((.cse0 (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~2#1_181| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_1559) (+ .cse1 |c_ULTIMATE.start_main_~#x~0#1.offset| 4) v_ArrVal_1562)) (+ 72 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ .cse0 (* (div (* .cse0 (- 1)) 2) 2))))))) is different from false [2022-07-22 09:45:03,086 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_182| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~2#1_181| Int) (v_ArrVal_1562 Int) (v_ArrVal_1557 Int) (v_ArrVal_1559 Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_181| (+ |v_ULTIMATE.start_main_~i~2#1_182| 1))) (<= 0 (let ((.cse0 (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~2#1_181| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_182| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_1557) (+ .cse1 |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_1559) (+ .cse1 |c_ULTIMATE.start_main_~#x~0#1.offset| 4) v_ArrVal_1562)) (+ 72 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ .cse0 (* (div (* (- 1) .cse0) 2) 2)))))) (not (<= |v_ULTIMATE.start_main_~i~2#1_182| (+ |c_ULTIMATE.start_main_~i~2#1| 1))))) is different from false