./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/gcd02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/recursive/gcd02.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:03:15,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:03:15,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:03:15,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:03:15,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:03:15,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:03:15,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:03:15,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:03:15,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:03:15,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:03:15,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:03:15,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:03:15,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:03:15,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:03:15,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:03:15,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:03:15,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:03:15,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:03:15,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:03:15,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:03:15,535 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:03:15,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:03:15,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:03:15,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:03:15,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:03:15,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:03:15,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:03:15,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:03:15,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:03:15,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:03:15,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:03:15,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:03:15,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:03:15,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:03:15,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:03:15,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:03:15,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:03:15,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:03:15,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:03:15,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:03:15,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:03:15,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:03:15,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:03:15,587 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:03:15,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:03:15,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:03:15,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:03:15,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:03:15,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:03:15,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:03:15,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:03:15,591 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:03:15,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:03:15,592 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:03:15,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:03:15,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:03:15,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:03:15,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:03:15,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:03:15,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:03:15,593 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:03:15,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:03:15,593 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:03:15,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:03:15,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:03:15,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:03:15,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:03:15,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:03:15,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:03:15,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:03:15,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:03:15,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:03:15,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:03:15,596 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:03:15,596 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:03:15,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:03:15,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 [2022-07-21 05:03:15,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:03:15,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:03:15,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:03:15,961 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:03:15,961 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:03:15,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd02.c [2022-07-21 05:03:16,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500357cda/2a9141d8de754f578360ff6e8f1e33a1/FLAG371a4d3bc [2022-07-21 05:03:16,475 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:03:16,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c [2022-07-21 05:03:16,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500357cda/2a9141d8de754f578360ff6e8f1e33a1/FLAG371a4d3bc [2022-07-21 05:03:16,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/500357cda/2a9141d8de754f578360ff6e8f1e33a1 [2022-07-21 05:03:16,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:03:16,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:03:17,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:03:17,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:03:17,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:03:17,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:03:16" (1/1) ... [2022-07-21 05:03:17,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30daadf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17, skipping insertion in model container [2022-07-21 05:03:17,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:03:16" (1/1) ... [2022-07-21 05:03:17,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:03:17,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:03:17,124 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c[623,636] [2022-07-21 05:03:17,134 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/recursive/gcd02.c[1283,1296] [2022-07-21 05:03:17,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:03:17,142 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:03:17,170 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/recursive/gcd02.c[623,636] [2022-07-21 05:03:17,197 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/recursive/gcd02.c[1283,1296] [2022-07-21 05:03:17,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:03:17,209 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:03:17,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17 WrapperNode [2022-07-21 05:03:17,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:03:17,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:03:17,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:03:17,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:03:17,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (1/1) ... [2022-07-21 05:03:17,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (1/1) ... [2022-07-21 05:03:17,238 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2022-07-21 05:03:17,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:03:17,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:03:17,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:03:17,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:03:17,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (1/1) ... [2022-07-21 05:03:17,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (1/1) ... [2022-07-21 05:03:17,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (1/1) ... [2022-07-21 05:03:17,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (1/1) ... [2022-07-21 05:03:17,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (1/1) ... [2022-07-21 05:03:17,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (1/1) ... [2022-07-21 05:03:17,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (1/1) ... [2022-07-21 05:03:17,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:03:17,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:03:17,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:03:17,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:03:17,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (1/1) ... [2022-07-21 05:03:17,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:03:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:17,321 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) [2022-07-21 05:03:17,348 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 [2022-07-21 05:03:17,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:03:17,365 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2022-07-21 05:03:17,366 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2022-07-21 05:03:17,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:03:17,366 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2022-07-21 05:03:17,366 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2022-07-21 05:03:17,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:03:17,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:03:17,428 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:03:17,430 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:03:17,578 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:03:17,584 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:03:17,584 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 05:03:17,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:03:17 BoogieIcfgContainer [2022-07-21 05:03:17,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:03:17,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:03:17,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:03:17,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:03:17,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:03:16" (1/3) ... [2022-07-21 05:03:17,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288fa540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:03:17, skipping insertion in model container [2022-07-21 05:03:17,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:03:17" (2/3) ... [2022-07-21 05:03:17,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288fa540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:03:17, skipping insertion in model container [2022-07-21 05:03:17,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:03:17" (3/3) ... [2022-07-21 05:03:17,593 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd02.c [2022-07-21 05:03:17,605 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:03:17,606 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 05:03:17,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:03:17,660 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@6cfc8dda, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d730526 [2022-07-21 05:03:17,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 05:03:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 05:03:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 05:03:17,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:17,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:17,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:17,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1041004109, now seen corresponding path program 1 times [2022-07-21 05:03:17,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:17,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242678376] [2022-07-21 05:03:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:17,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:03:17,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:17,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242678376] [2022-07-21 05:03:17,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242678376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:03:17,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:03:17,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:03:17,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568873292] [2022-07-21 05:03:17,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:03:17,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:03:17,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:17,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:03:17,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:03:17,975 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:03:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:18,095 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2022-07-21 05:03:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 05:03:18,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 05:03:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:18,104 INFO L225 Difference]: With dead ends: 78 [2022-07-21 05:03:18,104 INFO L226 Difference]: Without dead ends: 41 [2022-07-21 05:03:18,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:03:18,110 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:18,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 133 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:03:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-21 05:03:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-21 05:03:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 05:03:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-07-21 05:03:18,155 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2022-07-21 05:03:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:18,156 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-07-21 05:03:18,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:03:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-07-21 05:03:18,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 05:03:18,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:18,157 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:18,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:03:18,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:18,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1602001293, now seen corresponding path program 1 times [2022-07-21 05:03:18,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:18,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132167171] [2022-07-21 05:03:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:18,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:03:18,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:18,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132167171] [2022-07-21 05:03:18,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132167171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:03:18,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:03:18,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:03:18,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169200245] [2022-07-21 05:03:18,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:03:18,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:03:18,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:03:18,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:03:18,237 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:03:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:18,351 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-07-21 05:03:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 05:03:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 05:03:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:18,354 INFO L225 Difference]: With dead ends: 59 [2022-07-21 05:03:18,355 INFO L226 Difference]: Without dead ends: 57 [2022-07-21 05:03:18,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:03:18,356 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:18,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 120 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:03:18,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-21 05:03:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-07-21 05:03:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 05:03:18,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-07-21 05:03:18,372 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2022-07-21 05:03:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:18,372 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-07-21 05:03:18,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:03:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-07-21 05:03:18,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 05:03:18,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:18,373 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:18,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 05:03:18,374 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:18,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1599171148, now seen corresponding path program 1 times [2022-07-21 05:03:18,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:18,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827576117] [2022-07-21 05:03:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:18,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:03:18,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:18,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827576117] [2022-07-21 05:03:18,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827576117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:03:18,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:03:18,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:03:18,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711972211] [2022-07-21 05:03:18,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:03:18,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:03:18,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:03:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:03:18,477 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:03:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:18,612 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2022-07-21 05:03:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 05:03:18,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 05:03:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:18,615 INFO L225 Difference]: With dead ends: 63 [2022-07-21 05:03:18,615 INFO L226 Difference]: Without dead ends: 61 [2022-07-21 05:03:18,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:03:18,617 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:18,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 147 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:03:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-21 05:03:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2022-07-21 05:03:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 05:03:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-21 05:03:18,644 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 14 [2022-07-21 05:03:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:18,644 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-21 05:03:18,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:03:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-21 05:03:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 05:03:18,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:18,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:18,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 05:03:18,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:18,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2110562560, now seen corresponding path program 1 times [2022-07-21 05:03:18,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:18,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75792750] [2022-07-21 05:03:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:18,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:18,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:18,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:03:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:03:18,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:18,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75792750] [2022-07-21 05:03:18,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75792750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:03:18,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:03:18,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 05:03:18,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529425003] [2022-07-21 05:03:18,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:03:18,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 05:03:18,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:18,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 05:03:18,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 05:03:18,752 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 05:03:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:18,777 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-07-21 05:03:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 05:03:18,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-07-21 05:03:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:18,779 INFO L225 Difference]: With dead ends: 55 [2022-07-21 05:03:18,779 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 05:03:18,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 05:03:18,780 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:18,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:03:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 05:03:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-21 05:03:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-21 05:03:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-07-21 05:03:18,789 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2022-07-21 05:03:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:18,789 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-07-21 05:03:18,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 05:03:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-07-21 05:03:18,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-21 05:03:18,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:18,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:18,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 05:03:18,791 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:18,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:18,792 INFO L85 PathProgramCache]: Analyzing trace with hash -291106652, now seen corresponding path program 1 times [2022-07-21 05:03:18,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:18,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265763999] [2022-07-21 05:03:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:18,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:18,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:18,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:03:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:03:18,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:18,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265763999] [2022-07-21 05:03:18,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265763999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:03:18,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:03:18,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 05:03:18,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052389306] [2022-07-21 05:03:18,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:03:18,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 05:03:18,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 05:03:18,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:03:18,899 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 05:03:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:19,032 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-07-21 05:03:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 05:03:19,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-07-21 05:03:19,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:19,043 INFO L225 Difference]: With dead ends: 69 [2022-07-21 05:03:19,044 INFO L226 Difference]: Without dead ends: 65 [2022-07-21 05:03:19,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-21 05:03:19,049 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:19,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:03:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-21 05:03:19,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2022-07-21 05:03:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-21 05:03:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-21 05:03:19,081 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 21 [2022-07-21 05:03:19,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:19,082 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-21 05:03:19,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 05:03:19,083 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-21 05:03:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 05:03:19,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:19,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:19,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 05:03:19,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:19,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1709846180, now seen corresponding path program 1 times [2022-07-21 05:03:19,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:19,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797655254] [2022-07-21 05:03:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:19,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:19,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:19,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:03:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:19,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:03:19,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:19,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797655254] [2022-07-21 05:03:19,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797655254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:03:19,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:03:19,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:03:19,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565904571] [2022-07-21 05:03:19,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:03:19,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:03:19,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:19,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:03:19,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:03:19,204 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 05:03:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:19,226 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2022-07-21 05:03:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:03:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-21 05:03:19,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:19,230 INFO L225 Difference]: With dead ends: 64 [2022-07-21 05:03:19,231 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 05:03:19,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:03:19,232 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:19,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:03:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 05:03:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-21 05:03:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-21 05:03:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-07-21 05:03:19,242 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2022-07-21 05:03:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:19,242 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-07-21 05:03:19,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 05:03:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-07-21 05:03:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 05:03:19,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:19,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:19,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 05:03:19,244 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1148028586, now seen corresponding path program 1 times [2022-07-21 05:03:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:19,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985562614] [2022-07-21 05:03:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:19,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:19,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:19,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:03:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:19,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 05:03:19,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:19,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985562614] [2022-07-21 05:03:19,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985562614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:19,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486659121] [2022-07-21 05:03:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:19,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:19,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:19,391 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) [2022-07-21 05:03:19,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:03:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:19,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 05:03:19,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 05:03:19,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 05:03:19,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486659121] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:19,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:19,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2022-07-21 05:03:19,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641625942] [2022-07-21 05:03:19,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:19,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 05:03:19,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:19,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 05:03:19,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-21 05:03:19,888 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 05:03:20,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:20,082 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-07-21 05:03:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:03:20,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-07-21 05:03:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:20,084 INFO L225 Difference]: With dead ends: 63 [2022-07-21 05:03:20,085 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 05:03:20,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-21 05:03:20,086 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:20,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:03:20,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 05:03:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-07-21 05:03:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 05:03:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-21 05:03:20,106 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2022-07-21 05:03:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:20,106 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-21 05:03:20,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 05:03:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-21 05:03:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 05:03:20,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:20,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:20,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 05:03:20,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:20,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash -729806600, now seen corresponding path program 1 times [2022-07-21 05:03:20,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:20,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937748893] [2022-07-21 05:03:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:20,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:20,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:20,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 05:03:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:03:20,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:20,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937748893] [2022-07-21 05:03:20,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937748893] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:20,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286471782] [2022-07-21 05:03:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:20,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:20,449 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) [2022-07-21 05:03:20,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 05:03:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 05:03:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:03:20,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 05:03:20,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286471782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:20,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:20,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-07-21 05:03:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216007063] [2022-07-21 05:03:20,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:20,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 05:03:20,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:20,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 05:03:20,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-21 05:03:20,892 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-21 05:03:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:21,050 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-07-21 05:03:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:03:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 29 [2022-07-21 05:03:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:21,053 INFO L225 Difference]: With dead ends: 74 [2022-07-21 05:03:21,053 INFO L226 Difference]: Without dead ends: 70 [2022-07-21 05:03:21,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-07-21 05:03:21,056 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:21,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 174 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:03:21,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-21 05:03:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2022-07-21 05:03:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-21 05:03:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-07-21 05:03:21,078 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2022-07-21 05:03:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:21,078 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-07-21 05:03:21,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-21 05:03:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-07-21 05:03:21,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 05:03:21,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:21,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:21,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:21,306 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,SelfDestructingSolverStorable7 [2022-07-21 05:03:21,307 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1241581992, now seen corresponding path program 1 times [2022-07-21 05:03:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781973959] [2022-07-21 05:03:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:21,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:21,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:21,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:21,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 05:03:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 05:03:21,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:21,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781973959] [2022-07-21 05:03:21,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781973959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:03:21,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:03:21,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 05:03:21,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676763754] [2022-07-21 05:03:21,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:03:21,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 05:03:21,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:21,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 05:03:21,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:03:21,406 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 05:03:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:21,522 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-07-21 05:03:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 05:03:21,522 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-07-21 05:03:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:21,523 INFO L225 Difference]: With dead ends: 80 [2022-07-21 05:03:21,523 INFO L226 Difference]: Without dead ends: 76 [2022-07-21 05:03:21,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-21 05:03:21,526 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:21,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 113 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:03:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-21 05:03:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2022-07-21 05:03:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-21 05:03:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2022-07-21 05:03:21,546 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 29 [2022-07-21 05:03:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:21,546 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2022-07-21 05:03:21,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 05:03:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2022-07-21 05:03:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 05:03:21,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:21,548 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:21,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 05:03:21,548 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:21,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:21,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2029271682, now seen corresponding path program 1 times [2022-07-21 05:03:21,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:21,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830283112] [2022-07-21 05:03:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:21,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:21,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:21,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:21,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 05:03:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:21,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:03:21,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:21,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830283112] [2022-07-21 05:03:21,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830283112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:21,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219161211] [2022-07-21 05:03:21,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:21,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:21,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:21,686 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) [2022-07-21 05:03:21,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 05:03:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:21,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 05:03:21,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:03:21,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:03:22,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219161211] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:22,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:22,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 20 [2022-07-21 05:03:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816197899] [2022-07-21 05:03:22,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:22,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 05:03:22,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 05:03:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-21 05:03:22,374 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 05:03:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:22,603 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2022-07-21 05:03:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:03:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2022-07-21 05:03:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:22,605 INFO L225 Difference]: With dead ends: 89 [2022-07-21 05:03:22,605 INFO L226 Difference]: Without dead ends: 85 [2022-07-21 05:03:22,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 11 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-07-21 05:03:22,606 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:22,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 201 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:03:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-21 05:03:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2022-07-21 05:03:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 11 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (27), 17 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-21 05:03:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2022-07-21 05:03:22,614 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 36 [2022-07-21 05:03:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:22,614 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2022-07-21 05:03:22,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 05:03:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2022-07-21 05:03:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 05:03:22,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:22,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:22,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:22,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:22,840 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:22,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:22,840 INFO L85 PathProgramCache]: Analyzing trace with hash -122584798, now seen corresponding path program 1 times [2022-07-21 05:03:22,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:22,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535693126] [2022-07-21 05:03:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:22,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:22,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:22,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:22,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 05:03:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:22,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:03:23,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:23,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535693126] [2022-07-21 05:03:23,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535693126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:23,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309773652] [2022-07-21 05:03:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:23,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:23,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:23,008 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) [2022-07-21 05:03:23,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 05:03:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 05:03:23,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:03:23,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:23,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:03:23,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309773652] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:23,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:23,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2022-07-21 05:03:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701312486] [2022-07-21 05:03:23,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:23,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 05:03:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 05:03:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-21 05:03:23,348 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-21 05:03:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:23,522 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-07-21 05:03:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 05:03:23,522 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36 [2022-07-21 05:03:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:23,523 INFO L225 Difference]: With dead ends: 84 [2022-07-21 05:03:23,523 INFO L226 Difference]: Without dead ends: 75 [2022-07-21 05:03:23,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-07-21 05:03:23,524 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:23,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 119 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:03:23,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-21 05:03:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-07-21 05:03:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 11 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (26), 16 states have call predecessors, (26), 11 states have call successors, (26) [2022-07-21 05:03:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2022-07-21 05:03:23,531 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 36 [2022-07-21 05:03:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:23,531 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2022-07-21 05:03:23,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-21 05:03:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2022-07-21 05:03:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 05:03:23,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:23,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:23,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:23,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:23,733 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1326914756, now seen corresponding path program 1 times [2022-07-21 05:03:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:23,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458360770] [2022-07-21 05:03:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:23,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:23,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:23,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:23,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:23,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 05:03:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 05:03:23,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:23,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458360770] [2022-07-21 05:03:23,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458360770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:23,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562399048] [2022-07-21 05:03:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:23,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:23,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:23,918 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) [2022-07-21 05:03:23,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 05:03:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 05:03:23,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 05:03:24,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 05:03:24,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562399048] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:24,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:24,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-07-21 05:03:24,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790426842] [2022-07-21 05:03:24,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:24,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 05:03:24,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:24,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 05:03:24,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 05:03:24,871 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 39 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (9), 1 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-21 05:03:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:25,378 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2022-07-21 05:03:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 05:03:25,379 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (9), 1 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 37 [2022-07-21 05:03:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:25,380 INFO L225 Difference]: With dead ends: 121 [2022-07-21 05:03:25,380 INFO L226 Difference]: Without dead ends: 117 [2022-07-21 05:03:25,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 05:03:25,382 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:25,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 332 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:03:25,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-21 05:03:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2022-07-21 05:03:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 11 states have call successors, (11), 4 states have call predecessors, (11), 13 states have return successors, (31), 18 states have call predecessors, (31), 11 states have call successors, (31) [2022-07-21 05:03:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2022-07-21 05:03:25,390 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 37 [2022-07-21 05:03:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:25,390 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2022-07-21 05:03:25,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (9), 1 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-21 05:03:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2022-07-21 05:03:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 05:03:25,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:25,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:25,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:25,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 05:03:25,607 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:25,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash -238590844, now seen corresponding path program 2 times [2022-07-21 05:03:25,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:25,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062199105] [2022-07-21 05:03:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:25,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:25,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:25,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:25,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 05:03:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 05:03:25,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:25,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062199105] [2022-07-21 05:03:25,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062199105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:25,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434715405] [2022-07-21 05:03:25,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:03:25,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:25,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:25,725 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) [2022-07-21 05:03:25,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 05:03:25,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:03:25,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 05:03:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 05:03:25,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 05:03:26,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434715405] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:26,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:26,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15] total 22 [2022-07-21 05:03:26,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186193366] [2022-07-21 05:03:26,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:26,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 05:03:26,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 05:03:26,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-07-21 05:03:26,301 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 22 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 05:03:26,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:26,613 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2022-07-21 05:03:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 05:03:26,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 37 [2022-07-21 05:03:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:26,615 INFO L225 Difference]: With dead ends: 96 [2022-07-21 05:03:26,615 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 05:03:26,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 05:03:26,616 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:26,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 195 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:03:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 05:03:26,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2022-07-21 05:03:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 10 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-21 05:03:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2022-07-21 05:03:26,622 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2022-07-21 05:03:26,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:26,623 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2022-07-21 05:03:26,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 05:03:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2022-07-21 05:03:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 05:03:26,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:26,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:26,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:26,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:26,848 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash 861262790, now seen corresponding path program 2 times [2022-07-21 05:03:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:26,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288351249] [2022-07-21 05:03:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:26,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:26,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:26,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:26,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:26,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 05:03:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:26,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:27,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:03:27,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:27,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288351249] [2022-07-21 05:03:27,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288351249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:27,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790803429] [2022-07-21 05:03:27,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:03:27,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:27,037 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) [2022-07-21 05:03:27,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 05:03:27,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:03:27,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:27,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 05:03:27,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:03:27,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:03:28,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790803429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:28,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:28,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2022-07-21 05:03:28,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773433825] [2022-07-21 05:03:28,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:28,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 05:03:28,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:28,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 05:03:28,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-21 05:03:28,336 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2022-07-21 05:03:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:28,716 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2022-07-21 05:03:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 05:03:28,717 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) Word has length 51 [2022-07-21 05:03:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:28,717 INFO L225 Difference]: With dead ends: 94 [2022-07-21 05:03:28,718 INFO L226 Difference]: Without dead ends: 90 [2022-07-21 05:03:28,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 05:03:28,719 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:28,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 369 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:03:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-21 05:03:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2022-07-21 05:03:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 11 states have call successors, (11), 4 states have call predecessors, (11), 12 states have return successors, (28), 17 states have call predecessors, (28), 11 states have call successors, (28) [2022-07-21 05:03:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2022-07-21 05:03:28,726 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 51 [2022-07-21 05:03:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:28,726 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2022-07-21 05:03:28,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2022-07-21 05:03:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2022-07-21 05:03:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 05:03:28,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:28,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:28,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-21 05:03:28,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:28,944 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash -124726374, now seen corresponding path program 3 times [2022-07-21 05:03:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:28,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749194700] [2022-07-21 05:03:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:28,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:28,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:29,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:29,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 05:03:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:29,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:29,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:03:29,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:29,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749194700] [2022-07-21 05:03:29,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749194700] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:29,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202228344] [2022-07-21 05:03:29,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:03:29,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:29,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:29,131 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) [2022-07-21 05:03:29,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 05:03:29,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 05:03:29,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 05:03:29,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:03:29,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:03:30,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202228344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:30,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:30,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 31 [2022-07-21 05:03:30,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309417397] [2022-07-21 05:03:30,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:30,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 05:03:30,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:30,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 05:03:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-07-21 05:03:30,083 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 31 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (13), 7 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-21 05:03:30,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:30,398 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-07-21 05:03:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 05:03:30,399 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (13), 7 states have call predecessors, (13), 12 states have call successors, (13) Word has length 43 [2022-07-21 05:03:30,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:30,399 INFO L225 Difference]: With dead ends: 84 [2022-07-21 05:03:30,399 INFO L226 Difference]: Without dead ends: 75 [2022-07-21 05:03:30,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 05:03:30,401 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:30,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 259 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:03:30,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-21 05:03:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-07-21 05:03:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 10 states have call successors, (10), 4 states have call predecessors, (10), 11 states have return successors, (24), 15 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-21 05:03:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2022-07-21 05:03:30,406 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 43 [2022-07-21 05:03:30,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:30,406 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2022-07-21 05:03:30,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (13), 7 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-21 05:03:30,406 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2022-07-21 05:03:30,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 05:03:30,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:30,407 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:30,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 05:03:30,610 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,SelfDestructingSolverStorable14 [2022-07-21 05:03:30,611 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:30,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1270773450, now seen corresponding path program 1 times [2022-07-21 05:03:30,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:30,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024166869] [2022-07-21 05:03:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:30,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:30,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:30,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:30,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:30,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 05:03:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:30,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 05:03:30,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:30,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024166869] [2022-07-21 05:03:30,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024166869] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:30,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334735299] [2022-07-21 05:03:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:30,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:30,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:30,810 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) [2022-07-21 05:03:30,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 05:03:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:30,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 05:03:30,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 05:03:31,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:03:31,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334735299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:31,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:31,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 34 [2022-07-21 05:03:31,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647352112] [2022-07-21 05:03:31,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:31,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 05:03:31,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 05:03:31,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 05:03:31,917 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 34 states, 31 states have (on average 2.225806451612903) internal successors, (69), 27 states have internal predecessors, (69), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-21 05:03:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:32,447 INFO L93 Difference]: Finished difference Result 112 states and 148 transitions. [2022-07-21 05:03:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 05:03:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.225806451612903) internal successors, (69), 27 states have internal predecessors, (69), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) Word has length 44 [2022-07-21 05:03:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:32,448 INFO L225 Difference]: With dead ends: 112 [2022-07-21 05:03:32,448 INFO L226 Difference]: Without dead ends: 108 [2022-07-21 05:03:32,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=1791, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 05:03:32,449 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:32,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 397 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:03:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-21 05:03:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2022-07-21 05:03:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 57 states have internal predecessors, (62), 11 states have call successors, (11), 4 states have call predecessors, (11), 14 states have return successors, (32), 20 states have call predecessors, (32), 11 states have call successors, (32) [2022-07-21 05:03:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-07-21 05:03:32,456 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 44 [2022-07-21 05:03:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:32,457 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-07-21 05:03:32,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.225806451612903) internal successors, (69), 27 states have internal predecessors, (69), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-21 05:03:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-07-21 05:03:32,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 05:03:32,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:32,458 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:32,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:32,671 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,SelfDestructingSolverStorable15 [2022-07-21 05:03:32,671 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash 132450678, now seen corresponding path program 2 times [2022-07-21 05:03:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:32,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712680418] [2022-07-21 05:03:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:32,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:32,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:32,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:32,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:32,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 05:03:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:32,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 05:03:32,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:32,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712680418] [2022-07-21 05:03:32,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712680418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:32,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965310015] [2022-07-21 05:03:32,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:03:32,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:32,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:32,796 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) [2022-07-21 05:03:32,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 05:03:32,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:03:32,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:32,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 05:03:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 05:03:33,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 05:03:33,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965310015] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:33,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:33,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2022-07-21 05:03:33,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026589873] [2022-07-21 05:03:33,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:33,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 05:03:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:33,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 05:03:33,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-07-21 05:03:33,588 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-21 05:03:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:33,821 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2022-07-21 05:03:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 05:03:33,822 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 44 [2022-07-21 05:03:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:33,823 INFO L225 Difference]: With dead ends: 109 [2022-07-21 05:03:33,823 INFO L226 Difference]: Without dead ends: 105 [2022-07-21 05:03:33,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 16 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-07-21 05:03:33,824 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:33,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 297 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:03:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-21 05:03:33,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2022-07-21 05:03:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 states have internal predecessors, (67), 11 states have call successors, (11), 4 states have call predecessors, (11), 16 states have return successors, (38), 23 states have call predecessors, (38), 11 states have call successors, (38) [2022-07-21 05:03:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2022-07-21 05:03:33,832 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 44 [2022-07-21 05:03:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:33,832 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2022-07-21 05:03:33,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 18 states have internal predecessors, (55), 8 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-21 05:03:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2022-07-21 05:03:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 05:03:33,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:33,834 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:33,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:34,047 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,SelfDestructingSolverStorable16 [2022-07-21 05:03:34,047 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash 815065250, now seen corresponding path program 3 times [2022-07-21 05:03:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:34,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894468846] [2022-07-21 05:03:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:34,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:34,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:34,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:34,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:34,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:34,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:03:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:34,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:03:34,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894468846] [2022-07-21 05:03:34,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894468846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:34,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963709451] [2022-07-21 05:03:34,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:03:34,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:34,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:34,242 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) [2022-07-21 05:03:34,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 05:03:34,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 05:03:34,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:34,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 05:03:34,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 05:03:34,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 05:03:37,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963709451] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:37,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:37,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 21] total 45 [2022-07-21 05:03:37,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356994088] [2022-07-21 05:03:37,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:37,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 05:03:37,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:37,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 05:03:37,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1829, Unknown=2, NotChecked=0, Total=1980 [2022-07-21 05:03:37,388 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand has 45 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 33 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-21 05:03:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:38,171 INFO L93 Difference]: Finished difference Result 148 states and 196 transitions. [2022-07-21 05:03:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 05:03:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 33 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) Word has length 52 [2022-07-21 05:03:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:38,175 INFO L225 Difference]: With dead ends: 148 [2022-07-21 05:03:38,175 INFO L226 Difference]: Without dead ends: 144 [2022-07-21 05:03:38,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=340, Invalid=3080, Unknown=2, NotChecked=0, Total=3422 [2022-07-21 05:03:38,178 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:38,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 492 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 775 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-07-21 05:03:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-21 05:03:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2022-07-21 05:03:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 65 states have internal predecessors, (73), 11 states have call successors, (11), 4 states have call predecessors, (11), 18 states have return successors, (44), 27 states have call predecessors, (44), 11 states have call successors, (44) [2022-07-21 05:03:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2022-07-21 05:03:38,192 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 128 transitions. Word has length 52 [2022-07-21 05:03:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:38,192 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 128 transitions. [2022-07-21 05:03:38,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 33 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-21 05:03:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 128 transitions. [2022-07-21 05:03:38,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 05:03:38,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:38,194 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:38,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-21 05:03:38,399 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,SelfDestructingSolverStorable17 [2022-07-21 05:03:38,399 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:38,400 INFO L85 PathProgramCache]: Analyzing trace with hash 850048834, now seen corresponding path program 4 times [2022-07-21 05:03:38,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:38,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706597138] [2022-07-21 05:03:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:38,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:38,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:38,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:38,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:38,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:38,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:03:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:38,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:03:38,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:38,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706597138] [2022-07-21 05:03:38,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706597138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:38,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793786653] [2022-07-21 05:03:38,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:03:38,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:38,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:38,620 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) [2022-07-21 05:03:38,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 05:03:38,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:03:38,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 05:03:38,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:03:39,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 05:03:40,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793786653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:40,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:40,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 20] total 37 [2022-07-21 05:03:40,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961182470] [2022-07-21 05:03:40,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:40,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 05:03:40,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:40,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 05:03:40,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 05:03:40,091 INFO L87 Difference]: Start difference. First operand 97 states and 128 transitions. Second operand has 37 states, 34 states have (on average 2.264705882352941) internal successors, (77), 28 states have internal predecessors, (77), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2022-07-21 05:03:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:40,750 INFO L93 Difference]: Finished difference Result 135 states and 183 transitions. [2022-07-21 05:03:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 05:03:40,750 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.264705882352941) internal successors, (77), 28 states have internal predecessors, (77), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) Word has length 52 [2022-07-21 05:03:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:40,751 INFO L225 Difference]: With dead ends: 135 [2022-07-21 05:03:40,752 INFO L226 Difference]: Without dead ends: 131 [2022-07-21 05:03:40,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=2205, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 05:03:40,753 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:40,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 464 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 05:03:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-21 05:03:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 70. [2022-07-21 05:03:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 10 states have call successors, (10), 4 states have call predecessors, (10), 11 states have return successors, (22), 15 states have call predecessors, (22), 10 states have call successors, (22) [2022-07-21 05:03:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-07-21 05:03:40,761 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 52 [2022-07-21 05:03:40,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:40,761 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-07-21 05:03:40,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.264705882352941) internal successors, (77), 28 states have internal predecessors, (77), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2022-07-21 05:03:40,761 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-07-21 05:03:40,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 05:03:40,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:40,762 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:40,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:40,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:40,963 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:40,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:40,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2103225754, now seen corresponding path program 5 times [2022-07-21 05:03:40,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:40,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433682970] [2022-07-21 05:03:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:40,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:40,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:41,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:41,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:41,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 05:03:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:41,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:41,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:03:41,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:41,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433682970] [2022-07-21 05:03:41,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433682970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:41,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683278257] [2022-07-21 05:03:41,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 05:03:41,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:41,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:41,162 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) [2022-07-21 05:03:41,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 05:03:41,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-21 05:03:41,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:41,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 05:03:41,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:03:41,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:03:42,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683278257] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:42,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:42,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2022-07-21 05:03:42,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690287011] [2022-07-21 05:03:42,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:42,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 05:03:42,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:42,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 05:03:42,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-21 05:03:42,308 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2022-07-21 05:03:42,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:42,658 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-07-21 05:03:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 05:03:42,659 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) Word has length 51 [2022-07-21 05:03:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:42,660 INFO L225 Difference]: With dead ends: 97 [2022-07-21 05:03:42,660 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 05:03:42,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 84 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 05:03:42,661 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:42,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 384 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:03:42,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 05:03:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2022-07-21 05:03:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.12) internal successors, (56), 52 states have internal predecessors, (56), 10 states have call successors, (10), 4 states have call predecessors, (10), 12 states have return successors, (24), 16 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-21 05:03:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2022-07-21 05:03:42,667 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 51 [2022-07-21 05:03:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:42,667 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2022-07-21 05:03:42,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2022-07-21 05:03:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2022-07-21 05:03:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 05:03:42,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:42,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:42,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:42,879 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,SelfDestructingSolverStorable19 [2022-07-21 05:03:42,879 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:42,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:42,880 INFO L85 PathProgramCache]: Analyzing trace with hash -262469082, now seen corresponding path program 6 times [2022-07-21 05:03:42,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:42,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366533664] [2022-07-21 05:03:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:42,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:42,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:42,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:43,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 05:03:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:43,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:43,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 05:03:43,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:43,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366533664] [2022-07-21 05:03:43,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366533664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:43,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386335495] [2022-07-21 05:03:43,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 05:03:43,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:43,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:43,120 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) [2022-07-21 05:03:43,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 05:03:43,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-21 05:03:43,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 05:03:43,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 05:03:43,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 05:03:44,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386335495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:44,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:44,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 33 [2022-07-21 05:03:44,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072146147] [2022-07-21 05:03:44,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:44,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 05:03:44,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:44,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 05:03:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 05:03:44,246 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 33 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-21 05:03:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:44,603 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2022-07-21 05:03:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 05:03:44,604 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) Word has length 51 [2022-07-21 05:03:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:44,605 INFO L225 Difference]: With dead ends: 91 [2022-07-21 05:03:44,605 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 05:03:44,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 05:03:44,606 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:44,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 329 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:03:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 05:03:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-07-21 05:03:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 10 states have call successors, (10), 4 states have call predecessors, (10), 12 states have return successors, (24), 17 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-21 05:03:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-07-21 05:03:44,616 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 51 [2022-07-21 05:03:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:44,616 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-07-21 05:03:44,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-21 05:03:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-07-21 05:03:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:03:44,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:44,618 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:44,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:44,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:44,842 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:44,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:44,842 INFO L85 PathProgramCache]: Analyzing trace with hash 334535194, now seen corresponding path program 4 times [2022-07-21 05:03:44,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:44,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86829989] [2022-07-21 05:03:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:44,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:44,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:44,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:44,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:44,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:45,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:03:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:45,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:45,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 05:03:45,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:45,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86829989] [2022-07-21 05:03:45,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86829989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:45,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656681223] [2022-07-21 05:03:45,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:03:45,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:45,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:45,090 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) [2022-07-21 05:03:45,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 05:03:45,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:03:45,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:45,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 05:03:45,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 05:03:45,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:47,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656681223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:47,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:03:47,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-07-21 05:03:47,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210208672] [2022-07-21 05:03:47,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:47,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 05:03:47,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:47,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 05:03:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 05:03:47,255 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 31 states, 28 states have (on average 2.107142857142857) internal successors, (59), 23 states have internal predecessors, (59), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:03:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:47,822 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2022-07-21 05:03:47,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 05:03:47,832 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.107142857142857) internal successors, (59), 23 states have internal predecessors, (59), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-07-21 05:03:47,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:47,833 INFO L225 Difference]: With dead ends: 106 [2022-07-21 05:03:47,833 INFO L226 Difference]: Without dead ends: 102 [2022-07-21 05:03:47,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=239, Invalid=2211, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 05:03:47,836 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:47,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 441 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:03:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-21 05:03:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2022-07-21 05:03:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 10 states have call successors, (10), 4 states have call predecessors, (10), 13 states have return successors, (27), 17 states have call predecessors, (27), 10 states have call successors, (27) [2022-07-21 05:03:47,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2022-07-21 05:03:47,845 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 59 [2022-07-21 05:03:47,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:47,846 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2022-07-21 05:03:47,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.107142857142857) internal successors, (59), 23 states have internal predecessors, (59), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:03:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2022-07-21 05:03:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:03:47,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:47,851 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:47,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:48,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:48,077 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1972765050, now seen corresponding path program 7 times [2022-07-21 05:03:48,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:48,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909018131] [2022-07-21 05:03:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:48,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:48,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:48,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:48,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:48,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:48,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:03:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:48,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:48,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 05:03:48,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:48,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909018131] [2022-07-21 05:03:48,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909018131] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:48,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182734224] [2022-07-21 05:03:48,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 05:03:48,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:48,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:48,275 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:03:48,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 05:03:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:48,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 05:03:48,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 05:03:48,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 05:03:49,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182734224] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:49,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:49,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2022-07-21 05:03:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965177704] [2022-07-21 05:03:49,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:49,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 05:03:49,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:49,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 05:03:49,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-07-21 05:03:49,807 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-21 05:03:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:50,092 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2022-07-21 05:03:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 05:03:50,093 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) Word has length 59 [2022-07-21 05:03:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:50,094 INFO L225 Difference]: With dead ends: 109 [2022-07-21 05:03:50,094 INFO L226 Difference]: Without dead ends: 105 [2022-07-21 05:03:50,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 21 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 05:03:50,095 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:50,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 344 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:03:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-21 05:03:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2022-07-21 05:03:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (33), 21 states have call predecessors, (33), 10 states have call successors, (33) [2022-07-21 05:03:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-07-21 05:03:50,102 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2022-07-21 05:03:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:50,102 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-07-21 05:03:50,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-21 05:03:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-07-21 05:03:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:03:50,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:50,104 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:50,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:50,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 05:03:50,323 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash 12091098, now seen corresponding path program 8 times [2022-07-21 05:03:50,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:50,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142736066] [2022-07-21 05:03:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:50,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:50,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:50,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:50,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:50,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:50,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:03:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:50,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:50,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 05:03:50,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:50,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142736066] [2022-07-21 05:03:50,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142736066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:50,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612006908] [2022-07-21 05:03:50,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:03:50,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:50,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:50,512 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:03:50,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 05:03:50,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:03:50,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:50,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 05:03:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 05:03:50,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 05:03:52,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612006908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:03:52,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:03:52,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2022-07-21 05:03:52,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455549416] [2022-07-21 05:03:52,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:52,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 05:03:52,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:52,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 05:03:52,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-07-21 05:03:52,002 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-21 05:03:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:52,397 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2022-07-21 05:03:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 05:03:52,397 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) Word has length 59 [2022-07-21 05:03:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:52,398 INFO L225 Difference]: With dead ends: 113 [2022-07-21 05:03:52,398 INFO L226 Difference]: Without dead ends: 109 [2022-07-21 05:03:52,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 98 SyntacticMatches, 20 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 05:03:52,399 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:52,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 444 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:03:52,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-21 05:03:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2022-07-21 05:03:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (33), 21 states have call predecessors, (33), 10 states have call successors, (33) [2022-07-21 05:03:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-07-21 05:03:52,411 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2022-07-21 05:03:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:52,411 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-07-21 05:03:52,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 23 states have internal predecessors, (72), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-21 05:03:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-07-21 05:03:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:03:52,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:52,413 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:52,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:52,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:52,637 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:52,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1626138758, now seen corresponding path program 9 times [2022-07-21 05:03:52,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:52,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593412951] [2022-07-21 05:03:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:52,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:52,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:52,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:52,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:52,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:52,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:03:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:52,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 05:03:52,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:52,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593412951] [2022-07-21 05:03:52,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593412951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:52,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208217082] [2022-07-21 05:03:52,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:03:52,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:52,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:52,879 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:03:52,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 05:03:53,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 05:03:53,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 05:03:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:03:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 05:03:53,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:03:55,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208217082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:55,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:03:55,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 34 [2022-07-21 05:03:55,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619449199] [2022-07-21 05:03:55,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:03:55,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 05:03:55,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:03:55,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 05:03:55,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1673, Unknown=2, NotChecked=0, Total=1806 [2022-07-21 05:03:55,534 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 34 states, 30 states have (on average 2.1) internal successors, (63), 26 states have internal predecessors, (63), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:03:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:03:58,281 INFO L93 Difference]: Finished difference Result 157 states and 208 transitions. [2022-07-21 05:03:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 05:03:58,284 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.1) internal successors, (63), 26 states have internal predecessors, (63), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-07-21 05:03:58,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:03:58,285 INFO L225 Difference]: With dead ends: 157 [2022-07-21 05:03:58,285 INFO L226 Difference]: Without dead ends: 153 [2022-07-21 05:03:58,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=303, Invalid=2887, Unknown=2, NotChecked=0, Total=3192 [2022-07-21 05:03:58,287 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:03:58,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 522 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 828 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-07-21 05:03:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-21 05:03:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2022-07-21 05:03:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 70 states have internal predecessors, (78), 10 states have call successors, (10), 4 states have call predecessors, (10), 21 states have return successors, (50), 29 states have call predecessors, (50), 10 states have call successors, (50) [2022-07-21 05:03:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2022-07-21 05:03:58,296 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 59 [2022-07-21 05:03:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:03:58,297 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2022-07-21 05:03:58,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.1) internal successors, (63), 26 states have internal predecessors, (63), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:03:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2022-07-21 05:03:58,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:03:58,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:03:58,298 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:03:58,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 05:03:58,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:58,519 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:03:58,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:03:58,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1786558534, now seen corresponding path program 10 times [2022-07-21 05:03:58,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:03:58,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365520136] [2022-07-21 05:03:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:03:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:03:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:58,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:03:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:58,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:58,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:58,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:03:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:58,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:03:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:58,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:58,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:03:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:03:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 05:03:58,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:03:58,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365520136] [2022-07-21 05:03:58,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365520136] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:03:58,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201943095] [2022-07-21 05:03:58,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:03:58,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:03:58,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:03:58,775 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:03:58,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 05:03:58,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:03:58,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:03:58,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 05:03:58,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 05:04:01,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:02,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201943095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:02,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:04:02,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2022-07-21 05:04:02,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323234554] [2022-07-21 05:04:02,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:02,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 05:04:02,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:02,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 05:04:02,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 05:04:02,920 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 32 states, 29 states have (on average 2.103448275862069) internal successors, (61), 24 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:04:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:03,604 INFO L93 Difference]: Finished difference Result 168 states and 229 transitions. [2022-07-21 05:04:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 05:04:03,605 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.103448275862069) internal successors, (61), 24 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-07-21 05:04:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:03,606 INFO L225 Difference]: With dead ends: 168 [2022-07-21 05:04:03,606 INFO L226 Difference]: Without dead ends: 164 [2022-07-21 05:04:03,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=302, Invalid=2454, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 05:04:03,607 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:03,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 507 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 529 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2022-07-21 05:04:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-21 05:04:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 109. [2022-07-21 05:04:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 72 states have internal predecessors, (82), 10 states have call successors, (10), 4 states have call predecessors, (10), 22 states have return successors, (53), 32 states have call predecessors, (53), 10 states have call successors, (53) [2022-07-21 05:04:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 145 transitions. [2022-07-21 05:04:03,618 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 145 transitions. Word has length 59 [2022-07-21 05:04:03,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:03,618 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 145 transitions. [2022-07-21 05:04:03,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.103448275862069) internal successors, (61), 24 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:04:03,618 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 145 transitions. [2022-07-21 05:04:03,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 05:04:03,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:03,619 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:03,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 05:04:03,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:03,833 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:03,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash 547734810, now seen corresponding path program 11 times [2022-07-21 05:04:03,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:03,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398859894] [2022-07-21 05:04:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:03,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:03,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:03,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:03,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:03,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:04,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:04:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:04,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:04,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 05:04:04,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:04,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398859894] [2022-07-21 05:04:04,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398859894] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:04,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743708112] [2022-07-21 05:04:04,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 05:04:04,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:04,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:04,140 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:04,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 05:04:04,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 05:04:04,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:04:04,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 05:04:04,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 05:04:04,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 05:04:06,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743708112] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:04:06,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:04:06,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 22] total 41 [2022-07-21 05:04:06,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79724251] [2022-07-21 05:04:06,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:06,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 05:04:06,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:06,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 05:04:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 05:04:06,288 INFO L87 Difference]: Start difference. First operand 109 states and 145 transitions. Second operand has 41 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) [2022-07-21 05:04:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:07,170 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2022-07-21 05:04:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 05:04:07,171 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) Word has length 59 [2022-07-21 05:04:07,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:07,173 INFO L225 Difference]: With dead ends: 201 [2022-07-21 05:04:07,173 INFO L226 Difference]: Without dead ends: 197 [2022-07-21 05:04:07,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 96 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 05:04:07,174 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:07,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 621 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 05:04:07,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-21 05:04:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 124. [2022-07-21 05:04:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 86 states have (on average 1.069767441860465) internal successors, (92), 82 states have internal predecessors, (92), 10 states have call successors, (10), 4 states have call predecessors, (10), 27 states have return successors, (68), 37 states have call predecessors, (68), 10 states have call successors, (68) [2022-07-21 05:04:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2022-07-21 05:04:07,186 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 59 [2022-07-21 05:04:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:07,186 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2022-07-21 05:04:07,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) [2022-07-21 05:04:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2022-07-21 05:04:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:04:07,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:07,188 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:07,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 05:04:07,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 05:04:07,411 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:07,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:07,412 INFO L85 PathProgramCache]: Analyzing trace with hash 789094822, now seen corresponding path program 12 times [2022-07-21 05:04:07,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:07,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309319513] [2022-07-21 05:04:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:07,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:07,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:07,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:07,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:07,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:07,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:07,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 05:04:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:07,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:07,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 05:04:07,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:07,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309319513] [2022-07-21 05:04:07,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309319513] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:07,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432542748] [2022-07-21 05:04:07,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 05:04:07,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:07,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:07,712 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:07,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 05:04:07,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 05:04:07,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:04:07,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 05:04:07,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 05:04:08,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:10,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432542748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:10,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:04:10,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 32 [2022-07-21 05:04:10,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470667457] [2022-07-21 05:04:10,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:10,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 05:04:10,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 05:04:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 05:04:10,321 INFO L87 Difference]: Start difference. First operand 124 states and 170 transitions. Second operand has 32 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 24 states have internal predecessors, (65), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:04:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:11,433 INFO L93 Difference]: Finished difference Result 189 states and 265 transitions. [2022-07-21 05:04:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 05:04:11,434 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 24 states have internal predecessors, (65), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 67 [2022-07-21 05:04:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:11,435 INFO L225 Difference]: With dead ends: 189 [2022-07-21 05:04:11,435 INFO L226 Difference]: Without dead ends: 185 [2022-07-21 05:04:11,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 81 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=340, Invalid=2740, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 05:04:11,437 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:11,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 648 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 05:04:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-21 05:04:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 132. [2022-07-21 05:04:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 92 states have (on average 1.065217391304348) internal successors, (98), 86 states have internal predecessors, (98), 10 states have call successors, (10), 4 states have call predecessors, (10), 29 states have return successors, (74), 41 states have call predecessors, (74), 10 states have call successors, (74) [2022-07-21 05:04:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 182 transitions. [2022-07-21 05:04:11,453 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 182 transitions. Word has length 67 [2022-07-21 05:04:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:11,453 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 182 transitions. [2022-07-21 05:04:11,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 24 states have internal predecessors, (65), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:04:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 182 transitions. [2022-07-21 05:04:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:04:11,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:11,455 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:11,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 05:04:11,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 05:04:11,675 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1906616390, now seen corresponding path program 13 times [2022-07-21 05:04:11,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:11,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661922006] [2022-07-21 05:04:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:11,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:11,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:11,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:11,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:11,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:11,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:11,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 05:04:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:12,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 05:04:12,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661922006] [2022-07-21 05:04:12,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661922006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356531626] [2022-07-21 05:04:12,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 05:04:12,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:12,052 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:12,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 05:04:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:12,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 05:04:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 05:04:12,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 05:04:15,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356531626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:04:15,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:04:15,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 25] total 45 [2022-07-21 05:04:15,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262750783] [2022-07-21 05:04:15,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:15,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 05:04:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 05:04:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 05:04:15,285 INFO L87 Difference]: Start difference. First operand 132 states and 182 transitions. Second operand has 45 states, 40 states have (on average 2.3) internal successors, (92), 35 states have internal predecessors, (92), 17 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (24), 13 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-21 05:04:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:16,485 INFO L93 Difference]: Finished difference Result 189 states and 261 transitions. [2022-07-21 05:04:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 05:04:16,485 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 2.3) internal successors, (92), 35 states have internal predecessors, (92), 17 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (24), 13 states have call predecessors, (24), 17 states have call successors, (24) Word has length 67 [2022-07-21 05:04:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:16,487 INFO L225 Difference]: With dead ends: 189 [2022-07-21 05:04:16,487 INFO L226 Difference]: Without dead ends: 185 [2022-07-21 05:04:16,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 109 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=436, Invalid=3224, Unknown=0, NotChecked=0, Total=3660 [2022-07-21 05:04:16,488 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 97 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:16,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 713 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 05:04:16,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-21 05:04:16,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 111. [2022-07-21 05:04:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.077922077922078) internal successors, (83), 74 states have internal predecessors, (83), 10 states have call successors, (10), 4 states have call predecessors, (10), 23 states have return successors, (56), 32 states have call predecessors, (56), 10 states have call successors, (56) [2022-07-21 05:04:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 149 transitions. [2022-07-21 05:04:16,499 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 149 transitions. Word has length 67 [2022-07-21 05:04:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:16,500 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 149 transitions. [2022-07-21 05:04:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 2.3) internal successors, (92), 35 states have internal predecessors, (92), 17 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (24), 13 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-21 05:04:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 149 transitions. [2022-07-21 05:04:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:04:16,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:16,501 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:16,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-21 05:04:16,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 05:04:16,715 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:16,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1155297274, now seen corresponding path program 14 times [2022-07-21 05:04:16,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:16,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426291488] [2022-07-21 05:04:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:16,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:16,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:16,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:16,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:16,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:16,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:16,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 05:04:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:16,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:17,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 05:04:17,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:17,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426291488] [2022-07-21 05:04:17,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426291488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:17,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596201446] [2022-07-21 05:04:17,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:04:17,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:17,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:17,044 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:17,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 05:04:17,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:04:17,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:04:17,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 05:04:17,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 05:04:17,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-21 05:04:20,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596201446] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:04:20,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:04:20,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 25] total 48 [2022-07-21 05:04:20,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897406372] [2022-07-21 05:04:20,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:20,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-21 05:04:20,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:20,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-21 05:04:20,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 05:04:20,432 INFO L87 Difference]: Start difference. First operand 111 states and 149 transitions. Second operand has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 35 states have internal predecessors, (95), 17 states have call successors, (19), 1 states have call predecessors, (19), 13 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2022-07-21 05:04:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:21,382 INFO L93 Difference]: Finished difference Result 183 states and 253 transitions. [2022-07-21 05:04:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 05:04:21,382 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 35 states have internal predecessors, (95), 17 states have call successors, (19), 1 states have call predecessors, (19), 13 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) Word has length 67 [2022-07-21 05:04:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:21,384 INFO L225 Difference]: With dead ends: 183 [2022-07-21 05:04:21,384 INFO L226 Difference]: Without dead ends: 179 [2022-07-21 05:04:21,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=396, Invalid=3386, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 05:04:21,385 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:21,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 622 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 05:04:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-21 05:04:21,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 96. [2022-07-21 05:04:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (44), 25 states have call predecessors, (44), 10 states have call successors, (44) [2022-07-21 05:04:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2022-07-21 05:04:21,395 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 67 [2022-07-21 05:04:21,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:21,396 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2022-07-21 05:04:21,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 35 states have internal predecessors, (95), 17 states have call successors, (19), 1 states have call predecessors, (19), 13 states have return successors, (23), 16 states have call predecessors, (23), 17 states have call successors, (23) [2022-07-21 05:04:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2022-07-21 05:04:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:04:21,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:21,397 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:21,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 05:04:21,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:21,621 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:21,621 INFO L85 PathProgramCache]: Analyzing trace with hash -37775706, now seen corresponding path program 15 times [2022-07-21 05:04:21,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:21,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080047382] [2022-07-21 05:04:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:21,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:21,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:21,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:21,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:21,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:21,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:21,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 05:04:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:21,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:21,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-21 05:04:21,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:21,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080047382] [2022-07-21 05:04:21,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080047382] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:21,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230815288] [2022-07-21 05:04:21,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:04:21,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:21,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:21,994 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:21,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 05:04:22,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 05:04:22,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:04:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 05:04:22,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 05:04:22,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:28,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230815288] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:28,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:04:28,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2022-07-21 05:04:28,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026556930] [2022-07-21 05:04:28,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:28,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 05:04:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:28,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 05:04:28,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1754, Unknown=1, NotChecked=0, Total=1892 [2022-07-21 05:04:28,498 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 34 states, 31 states have (on average 2.064516129032258) internal successors, (64), 24 states have internal predecessors, (64), 11 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (16), 13 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-21 05:04:29,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:29,669 INFO L93 Difference]: Finished difference Result 172 states and 231 transitions. [2022-07-21 05:04:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 05:04:29,669 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.064516129032258) internal successors, (64), 24 states have internal predecessors, (64), 11 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (16), 13 states have call predecessors, (16), 11 states have call successors, (16) Word has length 67 [2022-07-21 05:04:29,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:29,671 INFO L225 Difference]: With dead ends: 172 [2022-07-21 05:04:29,671 INFO L226 Difference]: Without dead ends: 168 [2022-07-21 05:04:29,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=377, Invalid=3528, Unknown=1, NotChecked=0, Total=3906 [2022-07-21 05:04:29,672 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 53 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:29,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 462 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 05:04:29,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-21 05:04:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 63. [2022-07-21 05:04:29,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-21 05:04:29,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-21 05:04:29,678 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 67 [2022-07-21 05:04:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:29,679 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-21 05:04:29,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.064516129032258) internal successors, (64), 24 states have internal predecessors, (64), 11 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (16), 13 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-21 05:04:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-21 05:04:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 05:04:29,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:29,680 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:29,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 05:04:29,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:29,904 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash -835098444, now seen corresponding path program 5 times [2022-07-21 05:04:29,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:29,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427640533] [2022-07-21 05:04:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:29,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:29,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:29,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:30,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:30,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 05:04:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:30,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:30,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:30,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 05:04:30,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:30,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427640533] [2022-07-21 05:04:30,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427640533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:30,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579586496] [2022-07-21 05:04:30,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 05:04:30,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:30,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:30,212 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:30,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 05:04:30,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 05:04:30,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:04:30,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 05:04:30,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 05:04:30,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:32,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579586496] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:32,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:04:32,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2022-07-21 05:04:32,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493025272] [2022-07-21 05:04:32,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:32,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 05:04:32,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:32,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 05:04:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 05:04:32,053 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 29 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:04:32,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:32,603 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2022-07-21 05:04:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 05:04:32,603 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 58 [2022-07-21 05:04:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:32,604 INFO L225 Difference]: With dead ends: 85 [2022-07-21 05:04:32,604 INFO L226 Difference]: Without dead ends: 76 [2022-07-21 05:04:32,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 77 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 05:04:32,605 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:32,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 392 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:04:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-21 05:04:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2022-07-21 05:04:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 9 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (18), 14 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-21 05:04:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-07-21 05:04:32,618 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 58 [2022-07-21 05:04:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:32,619 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-07-21 05:04:32,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:04:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-07-21 05:04:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 05:04:32,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:32,620 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:32,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 05:04:32,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-21 05:04:32,837 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash -551668204, now seen corresponding path program 16 times [2022-07-21 05:04:32,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:32,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355172478] [2022-07-21 05:04:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:32,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:32,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:32,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:32,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:32,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 05:04:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:33,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:33,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:33,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 05:04:33,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:33,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355172478] [2022-07-21 05:04:33,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355172478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:33,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037900882] [2022-07-21 05:04:33,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:04:33,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:33,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:33,146 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:33,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 05:04:33,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:04:33,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:04:33,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 05:04:33,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 05:04:33,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:34,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037900882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:34,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:04:34,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2022-07-21 05:04:34,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777011342] [2022-07-21 05:04:34,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:34,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 05:04:34,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:34,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 05:04:34,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 05:04:34,925 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 29 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:04:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:35,518 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2022-07-21 05:04:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 05:04:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 58 [2022-07-21 05:04:35,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:35,520 INFO L225 Difference]: With dead ends: 89 [2022-07-21 05:04:35,520 INFO L226 Difference]: Without dead ends: 80 [2022-07-21 05:04:35,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 05:04:35,521 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:35,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 435 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:04:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-21 05:04:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2022-07-21 05:04:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.125) internal successors, (54), 49 states have internal predecessors, (54), 9 states have call successors, (9), 4 states have call predecessors, (9), 11 states have return successors, (20), 15 states have call predecessors, (20), 9 states have call successors, (20) [2022-07-21 05:04:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2022-07-21 05:04:35,527 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 58 [2022-07-21 05:04:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:35,527 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2022-07-21 05:04:35,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (11), 1 states have call predecessors, (11), 10 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-07-21 05:04:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2022-07-21 05:04:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 05:04:35,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:35,528 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:35,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 05:04:35,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-21 05:04:35,739 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:35,740 INFO L85 PathProgramCache]: Analyzing trace with hash 590358656, now seen corresponding path program 17 times [2022-07-21 05:04:35,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:35,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229673757] [2022-07-21 05:04:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:35,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:35,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:35,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:35,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:35,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:35,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:04:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:35,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:36,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:36,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 05:04:36,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:36,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229673757] [2022-07-21 05:04:36,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229673757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:36,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311865298] [2022-07-21 05:04:36,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 05:04:36,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:36,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:36,116 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:36,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 05:04:36,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 05:04:36,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:04:36,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 05:04:36,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 05:04:36,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:40,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311865298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:40,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:04:40,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2022-07-21 05:04:40,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933568202] [2022-07-21 05:04:40,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:40,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 05:04:40,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:40,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 05:04:40,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1283, Unknown=1, NotChecked=0, Total=1406 [2022-07-21 05:04:40,534 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 31 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 23 states have internal predecessors, (60), 11 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-21 05:04:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:41,228 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-07-21 05:04:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 05:04:41,228 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 23 states have internal predecessors, (60), 11 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) Word has length 66 [2022-07-21 05:04:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:41,229 INFO L225 Difference]: With dead ends: 90 [2022-07-21 05:04:41,229 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 05:04:41,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=260, Invalid=2091, Unknown=1, NotChecked=0, Total=2352 [2022-07-21 05:04:41,230 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:41,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 529 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 05:04:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 05:04:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-07-21 05:04:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (22), 15 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 05:04:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-07-21 05:04:41,236 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2022-07-21 05:04:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:41,236 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-07-21 05:04:41,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 23 states have internal predecessors, (60), 11 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-21 05:04:41,237 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-07-21 05:04:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 05:04:41,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:41,238 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:41,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 05:04:41,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:41,451 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash 720804832, now seen corresponding path program 6 times [2022-07-21 05:04:41,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:41,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102784998] [2022-07-21 05:04:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:41,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:41,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:41,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:41,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:41,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:41,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:04:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:41,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:41,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:41,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 05:04:41,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:41,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102784998] [2022-07-21 05:04:41,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102784998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:41,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431994656] [2022-07-21 05:04:41,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 05:04:41,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:41,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:41,726 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:41,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 05:04:42,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 05:04:42,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:04:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 05:04:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 05:04:42,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:45,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431994656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:45,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:04:45,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2022-07-21 05:04:45,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533024092] [2022-07-21 05:04:45,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:45,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 05:04:45,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 05:04:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2022-07-21 05:04:45,556 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 05:04:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:46,044 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2022-07-21 05:04:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 05:04:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) Word has length 66 [2022-07-21 05:04:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:46,045 INFO L225 Difference]: With dead ends: 101 [2022-07-21 05:04:46,045 INFO L226 Difference]: Without dead ends: 97 [2022-07-21 05:04:46,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=157, Invalid=1402, Unknown=1, NotChecked=0, Total=1560 [2022-07-21 05:04:46,046 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:46,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 466 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:04:46,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-21 05:04:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2022-07-21 05:04:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (29), 19 states have call predecessors, (29), 10 states have call successors, (29) [2022-07-21 05:04:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-07-21 05:04:46,053 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2022-07-21 05:04:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:46,054 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-07-21 05:04:46,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 05:04:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-07-21 05:04:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 05:04:46,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:46,055 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:46,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-21 05:04:46,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:46,271 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash 354934560, now seen corresponding path program 18 times [2022-07-21 05:04:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:46,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031350645] [2022-07-21 05:04:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:46,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:46,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:46,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:46,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:46,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:46,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:04:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:46,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:46,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:46,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 05:04:46,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:46,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031350645] [2022-07-21 05:04:46,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031350645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:46,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889457058] [2022-07-21 05:04:46,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 05:04:46,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:46,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:46,652 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:46,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 05:04:46,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 05:04:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:04:46,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 05:04:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 05:04:47,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:49,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889457058] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:49,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:04:49,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2022-07-21 05:04:49,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615062784] [2022-07-21 05:04:49,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:49,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 05:04:49,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:49,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 05:04:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1283, Unknown=1, NotChecked=0, Total=1406 [2022-07-21 05:04:49,749 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 31 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 23 states have internal predecessors, (60), 11 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-21 05:04:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:50,381 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2022-07-21 05:04:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 05:04:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 23 states have internal predecessors, (60), 11 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) Word has length 66 [2022-07-21 05:04:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:50,382 INFO L225 Difference]: With dead ends: 102 [2022-07-21 05:04:50,383 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 05:04:50,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 88 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=260, Invalid=2091, Unknown=1, NotChecked=0, Total=2352 [2022-07-21 05:04:50,383 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:50,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 496 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:04:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 05:04:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2022-07-21 05:04:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (29), 19 states have call predecessors, (29), 10 states have call successors, (29) [2022-07-21 05:04:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-07-21 05:04:50,390 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2022-07-21 05:04:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:50,390 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-07-21 05:04:50,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 23 states have internal predecessors, (60), 11 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-21 05:04:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-07-21 05:04:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 05:04:50,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:50,392 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:50,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-21 05:04:50,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:50,610 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:50,610 INFO L85 PathProgramCache]: Analyzing trace with hash 485380736, now seen corresponding path program 19 times [2022-07-21 05:04:50,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:50,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535899858] [2022-07-21 05:04:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:50,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:50,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:50,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:50,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:50,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:50,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:04:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:50,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:50,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:50,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-21 05:04:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:50,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535899858] [2022-07-21 05:04:50,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535899858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:50,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094647547] [2022-07-21 05:04:50,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 05:04:50,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:50,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:50,914 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:50,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 05:04:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 05:04:51,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-21 05:04:52,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:04:54,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094647547] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:54,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:04:54,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 33 [2022-07-21 05:04:54,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554705290] [2022-07-21 05:04:54,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:04:54,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 05:04:54,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:04:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 05:04:54,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1590, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 05:04:54,724 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 33 states, 30 states have (on average 2.1) internal successors, (63), 25 states have internal predecessors, (63), 10 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-21 05:04:56,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:04:56,032 INFO L93 Difference]: Finished difference Result 129 states and 168 transitions. [2022-07-21 05:04:56,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 05:04:56,032 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.1) internal successors, (63), 25 states have internal predecessors, (63), 10 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 66 [2022-07-21 05:04:56,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:04:56,033 INFO L225 Difference]: With dead ends: 129 [2022-07-21 05:04:56,033 INFO L226 Difference]: Without dead ends: 125 [2022-07-21 05:04:56,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 85 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 05:04:56,034 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:04:56,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 506 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 544 Invalid, 0 Unknown, 138 Unchecked, 0.3s Time] [2022-07-21 05:04:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-21 05:04:56,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2022-07-21 05:04:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (40), 25 states have call predecessors, (40), 10 states have call successors, (40) [2022-07-21 05:04:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2022-07-21 05:04:56,042 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 66 [2022-07-21 05:04:56,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:04:56,042 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2022-07-21 05:04:56,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.1) internal successors, (63), 25 states have internal predecessors, (63), 10 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-21 05:04:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2022-07-21 05:04:56,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 05:04:56,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:04:56,043 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:04:56,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-21 05:04:56,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-21 05:04:56,267 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:04:56,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:04:56,268 INFO L85 PathProgramCache]: Analyzing trace with hash 959666752, now seen corresponding path program 20 times [2022-07-21 05:04:56,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:04:56,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145554558] [2022-07-21 05:04:56,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:04:56,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:04:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:56,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:04:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:56,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:56,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:56,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:04:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:56,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:04:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:56,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:56,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:56,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:04:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:04:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-21 05:04:56,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:04:56,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145554558] [2022-07-21 05:04:56,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145554558] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:04:56,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115655238] [2022-07-21 05:04:56,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:04:56,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:04:56,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:04:56,596 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:04:56,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 05:04:56,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:04:56,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:04:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 05:04:56,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:04:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 05:04:59,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:05:04,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115655238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:05:04,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:05:04,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 33 [2022-07-21 05:05:04,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87991133] [2022-07-21 05:05:04,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:05:04,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 05:05:04,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:05:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 05:05:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1504, Unknown=3, NotChecked=0, Total=1640 [2022-07-21 05:05:04,067 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-21 05:05:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:05:04,949 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2022-07-21 05:05:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 05:05:04,949 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) Word has length 66 [2022-07-21 05:05:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:05:04,950 INFO L225 Difference]: With dead ends: 147 [2022-07-21 05:05:04,950 INFO L226 Difference]: Without dead ends: 143 [2022-07-21 05:05:04,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=335, Invalid=2742, Unknown=3, NotChecked=0, Total=3080 [2022-07-21 05:05:04,951 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:05:04,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 450 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 528 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-07-21 05:05:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-21 05:05:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 99. [2022-07-21 05:05:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 10 states have call successors, (10), 4 states have call predecessors, (10), 20 states have return successors, (43), 26 states have call predecessors, (43), 10 states have call successors, (43) [2022-07-21 05:05:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2022-07-21 05:05:04,961 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 66 [2022-07-21 05:05:04,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:05:04,961 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2022-07-21 05:05:04,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2022-07-21 05:05:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2022-07-21 05:05:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 05:05:04,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:05:04,963 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:05:04,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-21 05:05:05,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 05:05:05,189 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:05:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:05:05,189 INFO L85 PathProgramCache]: Analyzing trace with hash 724242656, now seen corresponding path program 21 times [2022-07-21 05:05:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:05:05,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647023987] [2022-07-21 05:05:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:05:05,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:05:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:05,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:05:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:05,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:05,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:05,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:05,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-21 05:05:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:05,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:05,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:05,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 05:05:05,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:05:05,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647023987] [2022-07-21 05:05:05,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647023987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:05:05,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53741696] [2022-07-21 05:05:05,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:05:05,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:05:05,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:05:05,460 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:05:05,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 05:05:05,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 05:05:05,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:05:05,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 05:05:05,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:05:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 05:05:06,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:05:09,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53741696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:05:09,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:05:09,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2022-07-21 05:05:09,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341301581] [2022-07-21 05:05:09,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:05:09,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 05:05:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:05:09,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 05:05:09,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2022-07-21 05:05:09,048 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 05:05:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:05:09,555 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2022-07-21 05:05:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 05:05:09,555 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) Word has length 66 [2022-07-21 05:05:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:05:09,556 INFO L225 Difference]: With dead ends: 127 [2022-07-21 05:05:09,556 INFO L226 Difference]: Without dead ends: 123 [2022-07-21 05:05:09,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=157, Invalid=1402, Unknown=1, NotChecked=0, Total=1560 [2022-07-21 05:05:09,557 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:05:09,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 555 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:05:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-21 05:05:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 103. [2022-07-21 05:05:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 10 states have call successors, (10), 4 states have call predecessors, (10), 21 states have return successors, (45), 28 states have call predecessors, (45), 10 states have call successors, (45) [2022-07-21 05:05:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2022-07-21 05:05:09,566 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 66 [2022-07-21 05:05:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:05:09,566 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2022-07-21 05:05:09,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 8 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (14), 10 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 05:05:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2022-07-21 05:05:09,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 05:05:09,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:05:09,567 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:05:09,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-21 05:05:09,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 05:05:09,781 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:05:09,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:05:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1898709812, now seen corresponding path program 7 times [2022-07-21 05:05:09,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:05:09,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429320720] [2022-07-21 05:05:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:05:09,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:05:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:09,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:05:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:09,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:09,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:09,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:09,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:09,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 05:05:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:10,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:10,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:10,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 05:05:10,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:05:10,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429320720] [2022-07-21 05:05:10,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429320720] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:05:10,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739858579] [2022-07-21 05:05:10,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 05:05:10,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:05:10,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:05:10,118 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:05:10,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 05:05:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 05:05:10,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:05:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 05:05:10,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:05:14,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739858579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:05:14,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:05:14,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2022-07-21 05:05:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263089767] [2022-07-21 05:05:14,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:05:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 05:05:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:05:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 05:05:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1165, Unknown=1, NotChecked=0, Total=1260 [2022-07-21 05:05:14,488 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 24 states have internal predecessors, (64), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-21 05:05:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:05:15,423 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2022-07-21 05:05:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 05:05:15,424 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 24 states have internal predecessors, (64), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 74 [2022-07-21 05:05:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:05:15,424 INFO L225 Difference]: With dead ends: 133 [2022-07-21 05:05:15,424 INFO L226 Difference]: Without dead ends: 129 [2022-07-21 05:05:15,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=251, Invalid=2100, Unknown=1, NotChecked=0, Total=2352 [2022-07-21 05:05:15,425 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 05:05:15,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 635 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 05:05:15,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-21 05:05:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 97. [2022-07-21 05:05:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (39), 26 states have call predecessors, (39), 10 states have call successors, (39) [2022-07-21 05:05:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2022-07-21 05:05:15,434 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 74 [2022-07-21 05:05:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:05:15,434 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2022-07-21 05:05:15,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 24 states have internal predecessors, (64), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-21 05:05:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2022-07-21 05:05:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 05:05:15,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:05:15,436 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 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] [2022-07-21 05:05:15,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-21 05:05:15,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-21 05:05:15,655 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:05:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:05:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash -599965996, now seen corresponding path program 22 times [2022-07-21 05:05:15,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:05:15,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681270386] [2022-07-21 05:05:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:05:15,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:05:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:15,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:05:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:15,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:15,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:15,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:15,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:15,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 05:05:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:15,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:15,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:15,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-21 05:05:15,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:05:15,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681270386] [2022-07-21 05:05:15,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681270386] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:05:15,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554298742] [2022-07-21 05:05:15,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:05:15,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:05:15,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:05:15,984 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:05:15,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 05:05:16,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:05:16,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:05:16,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 05:05:16,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:05:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-21 05:05:16,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:05:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 05:05:19,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554298742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:05:19,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:05:19,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 35 [2022-07-21 05:05:19,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666709662] [2022-07-21 05:05:19,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:05:19,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 05:05:19,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:05:19,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 05:05:19,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 05:05:19,585 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2022-07-21 05:05:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:05:20,144 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2022-07-21 05:05:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 05:05:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) Word has length 74 [2022-07-21 05:05:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:05:20,146 INFO L225 Difference]: With dead ends: 131 [2022-07-21 05:05:20,146 INFO L226 Difference]: Without dead ends: 127 [2022-07-21 05:05:20,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 24 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 05:05:20,146 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 52 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:05:20,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 517 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 05:05:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-21 05:05:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2022-07-21 05:05:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.082191780821918) internal successors, (79), 70 states have internal predecessors, (79), 10 states have call successors, (10), 4 states have call predecessors, (10), 21 states have return successors, (45), 30 states have call predecessors, (45), 10 states have call successors, (45) [2022-07-21 05:05:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2022-07-21 05:05:20,154 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 134 transitions. Word has length 74 [2022-07-21 05:05:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:05:20,155 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 134 transitions. [2022-07-21 05:05:20,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (17), 1 states have call predecessors, (17), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2022-07-21 05:05:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 134 transitions. [2022-07-21 05:05:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 05:05:20,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:05:20,156 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:05:20,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-21 05:05:20,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:05:20,375 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:05:20,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:05:20,376 INFO L85 PathProgramCache]: Analyzing trace with hash -437615564, now seen corresponding path program 23 times [2022-07-21 05:05:20,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:05:20,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395247904] [2022-07-21 05:05:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:05:20,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:05:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:20,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:05:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:20,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:20,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:20,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:20,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:20,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 05:05:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:20,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:20,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:20,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 05:05:20,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:05:20,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395247904] [2022-07-21 05:05:20,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395247904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:05:20,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924926600] [2022-07-21 05:05:20,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 05:05:20,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:05:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:05:20,711 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:05:20,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-21 05:05:21,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 05:05:21,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:05:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 05:05:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:05:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 05:05:23,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:05:26,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924926600] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:05:26,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 05:05:26,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2022-07-21 05:05:26,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842846560] [2022-07-21 05:05:26,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 05:05:26,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 05:05:26,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:05:26,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 05:05:26,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1369, Unknown=2, NotChecked=0, Total=1482 [2022-07-21 05:05:26,514 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. Second operand has 35 states, 32 states have (on average 2.09375) internal successors, (67), 25 states have internal predecessors, (67), 10 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 10 states have call successors, (18) [2022-07-21 05:05:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:05:27,550 INFO L93 Difference]: Finished difference Result 158 states and 209 transitions. [2022-07-21 05:05:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 05:05:27,550 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.09375) internal successors, (67), 25 states have internal predecessors, (67), 10 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 10 states have call successors, (18) Word has length 74 [2022-07-21 05:05:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:05:27,551 INFO L225 Difference]: With dead ends: 158 [2022-07-21 05:05:27,551 INFO L226 Difference]: Without dead ends: 154 [2022-07-21 05:05:27,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=298, Invalid=2562, Unknown=2, NotChecked=0, Total=2862 [2022-07-21 05:05:27,553 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:05:27,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 563 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 590 Invalid, 0 Unknown, 156 Unchecked, 0.3s Time] [2022-07-21 05:05:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-21 05:05:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 112. [2022-07-21 05:05:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 74 states have internal predecessors, (84), 10 states have call successors, (10), 4 states have call predecessors, (10), 23 states have return successors, (51), 33 states have call predecessors, (51), 10 states have call successors, (51) [2022-07-21 05:05:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 145 transitions. [2022-07-21 05:05:27,562 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 145 transitions. Word has length 74 [2022-07-21 05:05:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:05:27,563 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 145 transitions. [2022-07-21 05:05:27,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.09375) internal successors, (67), 25 states have internal predecessors, (67), 10 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (18), 14 states have call predecessors, (18), 10 states have call successors, (18) [2022-07-21 05:05:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 145 transitions. [2022-07-21 05:05:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-21 05:05:27,564 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:05:27,564 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:05:27,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-21 05:05:27,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-21 05:05:27,783 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:05:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:05:27,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1410533388, now seen corresponding path program 24 times [2022-07-21 05:05:27,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:05:27,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409288194] [2022-07-21 05:05:27,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:05:27,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:05:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:27,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-21 05:05:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:27,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:27,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:27,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:27,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-21 05:05:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:27,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-21 05:05:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:28,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:28,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:28,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:05:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:05:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 05:05:28,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:05:28,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409288194] [2022-07-21 05:05:28,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409288194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:05:28,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338937838] [2022-07-21 05:05:28,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 05:05:28,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:05:28,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:05:28,137 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:05:28,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-21 05:05:28,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-21 05:05:28,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:05:28,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 05:05:28,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:05:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 44 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-21 05:05:34,417 INFO L328 TraceCheckSpWp]: Computing backward predicates...