./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 f4b24e32 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-?-f4b24e3 [2022-07-13 18:01:54,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:01:54,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:01:54,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:01:54,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:01:54,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:01:54,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:01:54,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:01:54,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:01:54,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:01:54,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:01:54,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:01:54,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:01:54,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:01:54,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:01:54,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:01:54,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:01:54,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:01:54,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:01:54,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:01:54,729 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:01:54,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:01:54,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:01:54,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:01:54,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:01:54,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:01:54,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:01:54,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:01:54,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:01:54,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:01:54,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:01:54,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:01:54,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:01:54,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:01:54,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:01:54,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:01:54,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:01:54,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:01:54,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:01:54,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:01:54,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:01:54,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:01:54,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:01:54,811 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:01:54,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:01:54,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:01:54,813 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:01:54,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:01:54,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:01:54,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:01:54,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:01:54,814 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:01:54,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:01:54,815 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:01:54,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:01:54,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:01:54,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:01:54,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:01:54,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:01:54,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:01:54,817 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:01:54,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:01:54,817 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:01:54,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:01:54,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:01:54,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:01:54,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:01:54,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:01:54,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:01:54,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:01:54,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:01:54,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:01:54,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:01:54,819 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:01:54,820 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:01:54,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:01:54,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 [2022-07-13 18:01:55,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:01:55,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:01:55,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:01:55,248 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:01:55,249 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:01:55,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd02.c [2022-07-13 18:01:55,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b85845e99/f4451d4974674d078fff0f46c5a3f92c/FLAG266ef0089 [2022-07-13 18:01:56,022 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:01:56,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c [2022-07-13 18:01:56,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b85845e99/f4451d4974674d078fff0f46c5a3f92c/FLAG266ef0089 [2022-07-13 18:01:56,077 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b85845e99/f4451d4974674d078fff0f46c5a3f92c [2022-07-13 18:01:56,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:01:56,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:01:56,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:01:56,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:01:56,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:01:56,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20644de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56, skipping insertion in model container [2022-07-13 18:01:56,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:01:56,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:01:56,357 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] [2022-07-13 18:01:56,370 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] [2022-07-13 18:01:56,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:01:56,380 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:01:56,392 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] [2022-07-13 18:01:56,397 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] [2022-07-13 18:01:56,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:01:56,409 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:01:56,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56 WrapperNode [2022-07-13 18:01:56,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:01:56,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:01:56,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:01:56,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:01:56,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,440 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2022-07-13 18:01:56,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:01:56,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:01:56,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:01:56,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:01:56,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:01:56,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:01:56,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:01:56,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:01:56,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (1/1) ... [2022-07-13 18:01:56,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:01:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:01:56,552 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) [2022-07-13 18:01:56,612 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 [2022-07-13 18:01:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:01:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2022-07-13 18:01:56,634 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2022-07-13 18:01:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:01:56,634 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2022-07-13 18:01:56,635 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2022-07-13 18:01:56,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:01:56,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:01:56,721 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:01:56,726 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:01:56,948 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:01:56,954 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:01:56,965 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 18:01:56,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:01:56 BoogieIcfgContainer [2022-07-13 18:01:56,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:01:56,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:01:56,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:01:56,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:01:56,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:01:56" (1/3) ... [2022-07-13 18:01:56,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da31c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:01:56, skipping insertion in model container [2022-07-13 18:01:56,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:56" (2/3) ... [2022-07-13 18:01:56,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4da31c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:01:56, skipping insertion in model container [2022-07-13 18:01:56,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:01:56" (3/3) ... [2022-07-13 18:01:56,980 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd02.c [2022-07-13 18:01:57,028 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:01:57,028 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 18:01:57,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:01:57,127 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@5f909985, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57a61ae1 [2022-07-13 18:01:57,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 18:01:57,152 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) [2022-07-13 18:01:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 18:01:57,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:57,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:01:57,159 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:57,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1041004109, now seen corresponding path program 1 times [2022-07-13 18:01:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:57,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314825003] [2022-07-13 18:01:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:01:57,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:57,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314825003] [2022-07-13 18:01:57,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314825003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:01:57,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:01:57,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:01:57,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744055669] [2022-07-13 18:01:57,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:01:57,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:01:57,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:01:57,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:01:57,676 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) [2022-07-13 18:01:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:57,916 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2022-07-13 18:01:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:01:57,925 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 [2022-07-13 18:01:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:57,931 INFO L225 Difference]: With dead ends: 78 [2022-07-13 18:01:57,931 INFO L226 Difference]: Without dead ends: 41 [2022-07-13 18:01:57,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:01:57,955 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 [2022-07-13 18:01:57,956 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] [2022-07-13 18:01:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-13 18:01:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-13 18:01:58,031 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) [2022-07-13 18:01:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-07-13 18:01:58,037 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2022-07-13 18:01:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:58,038 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-07-13 18:01:58,038 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) [2022-07-13 18:01:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-07-13 18:01:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 18:01:58,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:58,041 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:01:58,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:01:58,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1602001293, now seen corresponding path program 1 times [2022-07-13 18:01:58,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:58,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209000249] [2022-07-13 18:01:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:58,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:01:58,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209000249] [2022-07-13 18:01:58,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209000249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:01:58,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:01:58,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:01:58,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906843601] [2022-07-13 18:01:58,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:01:58,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:01:58,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:58,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:01:58,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:01:58,234 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) [2022-07-13 18:01:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:58,418 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-07-13 18:01:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:01:58,419 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 [2022-07-13 18:01:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:58,425 INFO L225 Difference]: With dead ends: 59 [2022-07-13 18:01:58,425 INFO L226 Difference]: Without dead ends: 57 [2022-07-13 18:01:58,426 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 [2022-07-13 18:01:58,427 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 [2022-07-13 18:01:58,428 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] [2022-07-13 18:01:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-13 18:01:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-07-13 18:01:58,465 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) [2022-07-13 18:01:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-07-13 18:01:58,468 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2022-07-13 18:01:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:58,468 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-07-13 18:01:58,468 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) [2022-07-13 18:01:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-07-13 18:01:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-13 18:01:58,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:58,469 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:01:58,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:01:58,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1599171148, now seen corresponding path program 1 times [2022-07-13 18:01:58,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:58,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878669846] [2022-07-13 18:01:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:58,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:01:58,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:58,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878669846] [2022-07-13 18:01:58,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878669846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:01:58,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:01:58,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:01:58,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778581551] [2022-07-13 18:01:58,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:01:58,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:01:58,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:01:58,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:01:58,620 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) [2022-07-13 18:01:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:58,773 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2022-07-13 18:01:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 18:01:58,774 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 [2022-07-13 18:01:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:58,777 INFO L225 Difference]: With dead ends: 63 [2022-07-13 18:01:58,777 INFO L226 Difference]: Without dead ends: 61 [2022-07-13 18:01:58,780 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 [2022-07-13 18:01:58,784 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-13 18:01:58,785 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] [2022-07-13 18:01:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-13 18:01:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2022-07-13 18:01:58,815 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) [2022-07-13 18:01:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-13 18:01:58,817 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 14 [2022-07-13 18:01:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:58,817 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-13 18:01:58,817 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) [2022-07-13 18:01:58,818 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-13 18:01:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 18:01:58,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:58,820 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] [2022-07-13 18:01:58,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:01:58,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2110562560, now seen corresponding path program 1 times [2022-07-13 18:01:58,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:58,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714157819] [2022-07-13 18:01:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:58,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:58,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:01:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:58,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 18:01:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:01:58,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714157819] [2022-07-13 18:01:58,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714157819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:01:58,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:01:58,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:01:58,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188282514] [2022-07-13 18:01:58,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:01:58,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:01:58,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:58,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:01:58,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:01:58,985 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) [2022-07-13 18:01:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:59,021 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-07-13 18:01:59,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:01:59,021 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 [2022-07-13 18:01:59,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:59,024 INFO L225 Difference]: With dead ends: 55 [2022-07-13 18:01:59,024 INFO L226 Difference]: Without dead ends: 51 [2022-07-13 18:01:59,025 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 [2022-07-13 18:01:59,030 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 [2022-07-13 18:01:59,031 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] [2022-07-13 18:01:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-13 18:01:59,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-13 18:01:59,053 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) [2022-07-13 18:01:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-07-13 18:01:59,055 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2022-07-13 18:01:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:59,056 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-07-13 18:01:59,056 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) [2022-07-13 18:01:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-07-13 18:01:59,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 18:01:59,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:59,060 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] [2022-07-13 18:01:59,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 18:01:59,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:59,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:59,061 INFO L85 PathProgramCache]: Analyzing trace with hash -291106652, now seen corresponding path program 1 times [2022-07-13 18:01:59,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:59,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225196938] [2022-07-13 18:01:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:59,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:01:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 18:01:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:01:59,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:59,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225196938] [2022-07-13 18:01:59,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225196938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:01:59,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:01:59,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 18:01:59,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562119589] [2022-07-13 18:01:59,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:01:59,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 18:01:59,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:59,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 18:01:59,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:01:59,226 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) [2022-07-13 18:01:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:59,437 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-07-13 18:01:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 18:01:59,440 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 [2022-07-13 18:01:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:59,447 INFO L225 Difference]: With dead ends: 69 [2022-07-13 18:01:59,448 INFO L226 Difference]: Without dead ends: 65 [2022-07-13 18:01:59,448 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 [2022-07-13 18:01:59,449 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 [2022-07-13 18:01:59,450 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] [2022-07-13 18:01:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-13 18:01:59,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2022-07-13 18:01:59,461 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) [2022-07-13 18:01:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-13 18:01:59,462 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 21 [2022-07-13 18:01:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:59,462 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-13 18:01:59,463 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) [2022-07-13 18:01:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-13 18:01:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 18:01:59,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:59,470 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] [2022-07-13 18:01:59,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 18:01:59,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:59,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:59,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1709846180, now seen corresponding path program 1 times [2022-07-13 18:01:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:59,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589736127] [2022-07-13 18:01:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:59,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:01:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 18:01:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:01:59,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:59,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589736127] [2022-07-13 18:01:59,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589736127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:01:59,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:01:59,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:01:59,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051891636] [2022-07-13 18:01:59,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:01:59,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:01:59,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:59,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:01:59,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:01:59,587 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) [2022-07-13 18:01:59,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:59,622 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2022-07-13 18:01:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:01:59,623 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 [2022-07-13 18:01:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:59,624 INFO L225 Difference]: With dead ends: 64 [2022-07-13 18:01:59,624 INFO L226 Difference]: Without dead ends: 55 [2022-07-13 18:01:59,624 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 [2022-07-13 18:01:59,624 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 [2022-07-13 18:01:59,625 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] [2022-07-13 18:01:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-13 18:01:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-13 18:01:59,636 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) [2022-07-13 18:01:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-07-13 18:01:59,637 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2022-07-13 18:01:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:59,638 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-07-13 18:01:59,638 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) [2022-07-13 18:01:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-07-13 18:01:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 18:01:59,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:59,640 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] [2022-07-13 18:01:59,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 18:01:59,640 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:59,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1148028586, now seen corresponding path program 1 times [2022-07-13 18:01:59,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:59,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222294786] [2022-07-13 18:01:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:59,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:01:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 18:01:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 18:01:59,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:59,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222294786] [2022-07-13 18:01:59,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222294786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:01:59,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841064411] [2022-07-13 18:01:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:59,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:01:59,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:01:59,864 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) [2022-07-13 18:01:59,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 18:01:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:59,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 18:01:59,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 18:02:00,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 18:02:00,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841064411] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:00,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:00,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2022-07-13 18:02:00,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880858009] [2022-07-13 18:02:00,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:00,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 18:02:00,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:00,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 18:02:00,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-13 18:02:00,428 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) [2022-07-13 18:02:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:00,687 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-07-13 18:02:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 18:02:00,688 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 [2022-07-13 18:02:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:00,689 INFO L225 Difference]: With dead ends: 63 [2022-07-13 18:02:00,689 INFO L226 Difference]: Without dead ends: 55 [2022-07-13 18:02:00,690 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 [2022-07-13 18:02:00,701 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:00,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:02:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-13 18:02:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-07-13 18:02:00,710 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) [2022-07-13 18:02:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-13 18:02:00,711 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2022-07-13 18:02:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:00,711 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-13 18:02:00,712 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) [2022-07-13 18:02:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-13 18:02:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 18:02:00,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:00,714 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] [2022-07-13 18:02:00,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:00,934 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 [2022-07-13 18:02:00,935 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash -729806600, now seen corresponding path program 1 times [2022-07-13 18:02:00,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:00,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043961935] [2022-07-13 18:02:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:00,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:00,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 18:02:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:02:01,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043961935] [2022-07-13 18:02:01,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043961935] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:01,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710571849] [2022-07-13 18:02:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:01,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:01,139 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) [2022-07-13 18:02:01,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 18:02:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 18:02:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:02:01,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 18:02:01,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710571849] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:01,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:01,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-07-13 18:02:01,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901434389] [2022-07-13 18:02:01,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:01,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 18:02:01,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:01,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 18:02:01,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-13 18:02:01,610 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) [2022-07-13 18:02:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:01,814 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-07-13 18:02:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 18:02:01,815 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 [2022-07-13 18:02:01,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:01,817 INFO L225 Difference]: With dead ends: 74 [2022-07-13 18:02:01,817 INFO L226 Difference]: Without dead ends: 70 [2022-07-13 18:02:01,818 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 [2022-07-13 18:02:01,819 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 [2022-07-13 18:02:01,819 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] [2022-07-13 18:02:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-13 18:02:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2022-07-13 18:02:01,834 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) [2022-07-13 18:02:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-07-13 18:02:01,835 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2022-07-13 18:02:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:01,836 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-07-13 18:02:01,836 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) [2022-07-13 18:02:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-07-13 18:02:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 18:02:01,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:01,839 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] [2022-07-13 18:02:01,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:02,059 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 [2022-07-13 18:02:02,060 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1241581992, now seen corresponding path program 1 times [2022-07-13 18:02:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:02,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826184478] [2022-07-13 18:02:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:02,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:02,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:02,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:02,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 18:02:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:02:02,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:02,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826184478] [2022-07-13 18:02:02,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826184478] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:02:02,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:02:02,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 18:02:02,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923206495] [2022-07-13 18:02:02,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:02:02,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 18:02:02,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:02,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 18:02:02,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:02:02,209 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) [2022-07-13 18:02:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:02,376 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-07-13 18:02:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 18:02:02,377 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 [2022-07-13 18:02:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:02,378 INFO L225 Difference]: With dead ends: 80 [2022-07-13 18:02:02,378 INFO L226 Difference]: Without dead ends: 76 [2022-07-13 18:02:02,379 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 [2022-07-13 18:02:02,380 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 [2022-07-13 18:02:02,381 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] [2022-07-13 18:02:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-13 18:02:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2022-07-13 18:02:02,393 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) [2022-07-13 18:02:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2022-07-13 18:02:02,395 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 29 [2022-07-13 18:02:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:02,395 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2022-07-13 18:02:02,395 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) [2022-07-13 18:02:02,396 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2022-07-13 18:02:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 18:02:02,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:02,396 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] [2022-07-13 18:02:02,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 18:02:02,397 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:02,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:02,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2029271682, now seen corresponding path program 1 times [2022-07-13 18:02:02,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:02,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217733668] [2022-07-13 18:02:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:02,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:02,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:02,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:02,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 18:02:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:02,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:02:02,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217733668] [2022-07-13 18:02:02,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217733668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330541571] [2022-07-13 18:02:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:02,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:02,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:02,588 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) [2022-07-13 18:02:02,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 18:02:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:02,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 18:02:02,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:02:02,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:02:03,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330541571] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:03,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:03,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 20 [2022-07-13 18:02:03,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349002480] [2022-07-13 18:02:03,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:03,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 18:02:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 18:02:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-13 18:02:03,499 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) [2022-07-13 18:02:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:03,764 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2022-07-13 18:02:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 18:02:03,764 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 [2022-07-13 18:02:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:03,765 INFO L225 Difference]: With dead ends: 89 [2022-07-13 18:02:03,765 INFO L226 Difference]: Without dead ends: 85 [2022-07-13 18:02:03,766 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 [2022-07-13 18:02:03,766 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 [2022-07-13 18:02:03,767 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] [2022-07-13 18:02:03,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-13 18:02:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2022-07-13 18:02:03,775 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) [2022-07-13 18:02:03,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2022-07-13 18:02:03,776 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 36 [2022-07-13 18:02:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:03,778 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2022-07-13 18:02:03,778 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) [2022-07-13 18:02:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2022-07-13 18:02:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 18:02:03,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:03,781 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] [2022-07-13 18:02:03,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:03,999 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 [2022-07-13 18:02:04,000 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash -122584798, now seen corresponding path program 1 times [2022-07-13 18:02:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:04,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010231036] [2022-07-13 18:02:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 18:02:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:02:04,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:04,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010231036] [2022-07-13 18:02:04,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010231036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:04,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078897183] [2022-07-13 18:02:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:04,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:04,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:04,342 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) [2022-07-13 18:02:04,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 18:02:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 18:02:04,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:02:04,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:02:04,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078897183] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:04,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:04,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2022-07-13 18:02:04,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63115225] [2022-07-13 18:02:04,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:04,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 18:02:04,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:04,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 18:02:04,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-13 18:02:04,804 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) [2022-07-13 18:02:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:05,165 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-07-13 18:02:05,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 18:02:05,166 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 [2022-07-13 18:02:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:05,167 INFO L225 Difference]: With dead ends: 84 [2022-07-13 18:02:05,167 INFO L226 Difference]: Without dead ends: 75 [2022-07-13 18:02:05,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-07-13 18:02:05,168 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:05,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 119 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:02:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-13 18:02:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-07-13 18:02:05,174 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) [2022-07-13 18:02:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2022-07-13 18:02:05,175 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 36 [2022-07-13 18:02:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:05,175 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2022-07-13 18:02:05,175 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) [2022-07-13 18:02:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2022-07-13 18:02:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 18:02:05,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:05,176 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] [2022-07-13 18:02:05,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:05,377 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 [2022-07-13 18:02:05,377 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:05,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1326914756, now seen corresponding path program 1 times [2022-07-13 18:02:05,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:05,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631082201] [2022-07-13 18:02:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:05,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:05,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:05,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:05,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:05,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 18:02:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 18:02:05,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:05,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631082201] [2022-07-13 18:02:05,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631082201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:05,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815834028] [2022-07-13 18:02:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:05,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:05,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:05,552 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) [2022-07-13 18:02:05,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 18:02:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:05,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 18:02:05,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 18:02:05,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 18:02:07,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815834028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:07,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:07,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-07-13 18:02:07,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232155811] [2022-07-13 18:02:07,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:07,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 18:02:07,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 18:02:07,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 18:02:07,034 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) [2022-07-13 18:02:07,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:07,587 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2022-07-13 18:02:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 18:02:07,588 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 [2022-07-13 18:02:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:07,589 INFO L225 Difference]: With dead ends: 121 [2022-07-13 18:02:07,590 INFO L226 Difference]: Without dead ends: 117 [2022-07-13 18:02:07,591 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 [2022-07-13 18:02:07,591 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-07-13 18:02:07,591 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] [2022-07-13 18:02:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-13 18:02:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2022-07-13 18:02:07,599 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) [2022-07-13 18:02:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2022-07-13 18:02:07,600 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 37 [2022-07-13 18:02:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:07,600 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2022-07-13 18:02:07,600 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) [2022-07-13 18:02:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2022-07-13 18:02:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 18:02:07,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:07,601 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] [2022-07-13 18:02:07,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:07,827 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 [2022-07-13 18:02:07,828 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash -238590844, now seen corresponding path program 2 times [2022-07-13 18:02:07,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:07,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151218683] [2022-07-13 18:02:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:07,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:07,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:08,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:08,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:08,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 18:02:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 18:02:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151218683] [2022-07-13 18:02:08,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151218683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750042486] [2022-07-13 18:02:08,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:02:08,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:08,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:08,113 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) [2022-07-13 18:02:08,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 18:02:08,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:02:08,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:08,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 18:02:08,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 18:02:08,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 18:02:08,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750042486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:08,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:08,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15] total 22 [2022-07-13 18:02:08,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278267094] [2022-07-13 18:02:08,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 18:02:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 18:02:08,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-07-13 18:02:08,865 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) [2022-07-13 18:02:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:09,163 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2022-07-13 18:02:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 18:02:09,164 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 [2022-07-13 18:02:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:09,165 INFO L225 Difference]: With dead ends: 96 [2022-07-13 18:02:09,165 INFO L226 Difference]: Without dead ends: 92 [2022-07-13 18:02:09,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 18:02:09,166 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:09,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 195 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:02:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-13 18:02:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2022-07-13 18:02:09,172 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) [2022-07-13 18:02:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2022-07-13 18:02:09,173 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2022-07-13 18:02:09,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:09,173 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2022-07-13 18:02:09,173 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) [2022-07-13 18:02:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2022-07-13 18:02:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:02:09,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:09,174 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] [2022-07-13 18:02:09,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:09,398 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 [2022-07-13 18:02:09,399 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:09,399 INFO L85 PathProgramCache]: Analyzing trace with hash 861262790, now seen corresponding path program 2 times [2022-07-13 18:02:09,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:09,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597542988] [2022-07-13 18:02:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:09,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:09,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:09,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:09,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:09,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 18:02:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:09,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:09,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:02:09,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597542988] [2022-07-13 18:02:09,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597542988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:09,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92685016] [2022-07-13 18:02:09,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:02:09,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:09,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:09,596 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) [2022-07-13 18:02:09,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 18:02:09,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:02:09,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:09,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 18:02:09,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:02:09,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:02:10,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92685016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:10,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:10,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2022-07-13 18:02:10,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888601917] [2022-07-13 18:02:10,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:10,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 18:02:10,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:10,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 18:02:10,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-13 18:02:10,896 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) [2022-07-13 18:02:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:11,270 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2022-07-13 18:02:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 18:02:11,271 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 [2022-07-13 18:02:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:11,272 INFO L225 Difference]: With dead ends: 94 [2022-07-13 18:02:11,272 INFO L226 Difference]: Without dead ends: 90 [2022-07-13 18:02:11,273 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 [2022-07-13 18:02:11,273 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:11,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 369 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:02:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-13 18:02:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2022-07-13 18:02:11,279 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) [2022-07-13 18:02:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2022-07-13 18:02:11,280 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 51 [2022-07-13 18:02:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:11,280 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2022-07-13 18:02:11,281 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) [2022-07-13 18:02:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2022-07-13 18:02:11,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 18:02:11,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:11,281 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] [2022-07-13 18:02:11,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:11,495 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 [2022-07-13 18:02:11,496 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash -124726374, now seen corresponding path program 3 times [2022-07-13 18:02:11,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:11,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425362320] [2022-07-13 18:02:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:11,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:11,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:11,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:11,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 18:02:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:11,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:11,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:02:11,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:11,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425362320] [2022-07-13 18:02:11,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425362320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:11,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022299410] [2022-07-13 18:02:11,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:02:11,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:11,676 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) [2022-07-13 18:02:11,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 18:02:11,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 18:02:11,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:11,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 18:02:11,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:02:12,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:02:12,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022299410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:12,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:12,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 31 [2022-07-13 18:02:12,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026851152] [2022-07-13 18:02:12,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:12,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 18:02:12,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:12,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 18:02:12,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-07-13 18:02:12,624 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) [2022-07-13 18:02:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:12,953 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-07-13 18:02:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 18:02:12,954 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 [2022-07-13 18:02:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:12,955 INFO L225 Difference]: With dead ends: 84 [2022-07-13 18:02:12,955 INFO L226 Difference]: Without dead ends: 75 [2022-07-13 18:02:12,955 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 [2022-07-13 18:02:12,956 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-13 18:02:12,956 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] [2022-07-13 18:02:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-13 18:02:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-07-13 18:02:12,961 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) [2022-07-13 18:02:12,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2022-07-13 18:02:12,961 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 43 [2022-07-13 18:02:12,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:12,962 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2022-07-13 18:02:12,962 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) [2022-07-13 18:02:12,962 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2022-07-13 18:02:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 18:02:12,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:12,963 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] [2022-07-13 18:02:12,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-13 18:02:13,163 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 [2022-07-13 18:02:13,164 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:13,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1270773450, now seen corresponding path program 1 times [2022-07-13 18:02:13,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:13,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204386814] [2022-07-13 18:02:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:13,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:13,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:13,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:13,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:13,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 18:02:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:13,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 18:02:13,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:13,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204386814] [2022-07-13 18:02:13,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204386814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:13,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386135083] [2022-07-13 18:02:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:13,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:13,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:13,352 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) [2022-07-13 18:02:13,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 18:02:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:13,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 18:02:13,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 18:02:13,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:02:14,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386135083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:14,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:14,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 34 [2022-07-13 18:02:14,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24574189] [2022-07-13 18:02:14,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:14,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 18:02:14,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:14,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 18:02:14,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 18:02:14,601 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) [2022-07-13 18:02:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:15,207 INFO L93 Difference]: Finished difference Result 112 states and 148 transitions. [2022-07-13 18:02:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 18:02:15,208 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 [2022-07-13 18:02:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:15,209 INFO L225 Difference]: With dead ends: 112 [2022-07-13 18:02:15,209 INFO L226 Difference]: Without dead ends: 108 [2022-07-13 18:02:15,210 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 [2022-07-13 18:02:15,210 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:15,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 397 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:02:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-13 18:02:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2022-07-13 18:02:15,238 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) [2022-07-13 18:02:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-07-13 18:02:15,242 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 44 [2022-07-13 18:02:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:15,242 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-07-13 18:02:15,243 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) [2022-07-13 18:02:15,243 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-07-13 18:02:15,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 18:02:15,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:15,251 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] [2022-07-13 18:02:15,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:15,472 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 [2022-07-13 18:02:15,473 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:15,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:15,473 INFO L85 PathProgramCache]: Analyzing trace with hash 132450678, now seen corresponding path program 2 times [2022-07-13 18:02:15,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:15,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533848219] [2022-07-13 18:02:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:15,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:15,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:15,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:15,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:15,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 18:02:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:15,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 18:02:15,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:15,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533848219] [2022-07-13 18:02:15,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533848219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:15,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430420195] [2022-07-13 18:02:15,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:02:15,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:15,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:15,784 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) [2022-07-13 18:02:15,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 18:02:15,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:02:15,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:15,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 18:02:15,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 18:02:16,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 18:02:16,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430420195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:16,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:16,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2022-07-13 18:02:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110576163] [2022-07-13 18:02:16,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:16,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 18:02:16,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 18:02:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-07-13 18:02:16,766 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) [2022-07-13 18:02:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:17,068 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2022-07-13 18:02:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 18:02:17,069 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 [2022-07-13 18:02:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:17,070 INFO L225 Difference]: With dead ends: 109 [2022-07-13 18:02:17,070 INFO L226 Difference]: Without dead ends: 105 [2022-07-13 18:02:17,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 16 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-07-13 18:02:17,071 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-13 18:02:17,071 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] [2022-07-13 18:02:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-13 18:02:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2022-07-13 18:02:17,081 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) [2022-07-13 18:02:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2022-07-13 18:02:17,081 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 44 [2022-07-13 18:02:17,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:17,082 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2022-07-13 18:02:17,082 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) [2022-07-13 18:02:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2022-07-13 18:02:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 18:02:17,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:17,084 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] [2022-07-13 18:02:17,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:17,303 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 [2022-07-13 18:02:17,303 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:17,304 INFO L85 PathProgramCache]: Analyzing trace with hash 815065250, now seen corresponding path program 3 times [2022-07-13 18:02:17,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:17,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707913036] [2022-07-13 18:02:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:17,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:17,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:17,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:17,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:17,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:02:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:17,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:02:17,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:17,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707913036] [2022-07-13 18:02:17,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707913036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:17,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144139378] [2022-07-13 18:02:17,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:02:17,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:17,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:17,592 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) [2022-07-13 18:02:17,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 18:02:17,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 18:02:17,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:17,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-13 18:02:17,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 18:02:18,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 18:02:23,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144139378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:23,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:23,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 21] total 45 [2022-07-13 18:02:23,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728322068] [2022-07-13 18:02:23,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:23,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 18:02:23,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:23,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 18:02:23,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1826, Unknown=5, NotChecked=0, Total=1980 [2022-07-13 18:02:23,479 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) [2022-07-13 18:02:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:24,663 INFO L93 Difference]: Finished difference Result 148 states and 196 transitions. [2022-07-13 18:02:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 18:02:24,663 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 [2022-07-13 18:02:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:24,664 INFO L225 Difference]: With dead ends: 148 [2022-07-13 18:02:24,665 INFO L226 Difference]: Without dead ends: 144 [2022-07-13 18:02:24,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=340, Invalid=3077, Unknown=5, NotChecked=0, Total=3422 [2022-07-13 18:02:24,666 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:24,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 492 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 775 Invalid, 0 Unknown, 44 Unchecked, 0.7s Time] [2022-07-13 18:02:24,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-13 18:02:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2022-07-13 18:02:24,676 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) [2022-07-13 18:02:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2022-07-13 18:02:24,677 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 128 transitions. Word has length 52 [2022-07-13 18:02:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:24,678 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 128 transitions. [2022-07-13 18:02:24,678 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) [2022-07-13 18:02:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 128 transitions. [2022-07-13 18:02:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 18:02:24,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:24,679 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] [2022-07-13 18:02:24,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:24,895 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 [2022-07-13 18:02:24,895 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:24,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash 850048834, now seen corresponding path program 4 times [2022-07-13 18:02:24,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:24,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121189184] [2022-07-13 18:02:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:24,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:24,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:24,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:25,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:25,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:25,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:02:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:25,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:02:25,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:25,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121189184] [2022-07-13 18:02:25,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121189184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:25,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925294955] [2022-07-13 18:02:25,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:02:25,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:25,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:25,239 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) [2022-07-13 18:02:25,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 18:02:25,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:02:25,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:25,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 18:02:25,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:02:25,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 18:02:27,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925294955] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:27,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:27,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 20] total 37 [2022-07-13 18:02:27,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557860855] [2022-07-13 18:02:27,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:27,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-13 18:02:27,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-13 18:02:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 18:02:27,136 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) [2022-07-13 18:02:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:27,969 INFO L93 Difference]: Finished difference Result 135 states and 183 transitions. [2022-07-13 18:02:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 18:02:27,973 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 [2022-07-13 18:02:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:27,974 INFO L225 Difference]: With dead ends: 135 [2022-07-13 18:02:27,974 INFO L226 Difference]: Without dead ends: 131 [2022-07-13 18:02:27,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=2205, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 18:02:27,976 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:27,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 464 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 18:02:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-13 18:02:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 70. [2022-07-13 18:02:27,996 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) [2022-07-13 18:02:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-07-13 18:02:27,998 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 52 [2022-07-13 18:02:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:27,999 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-07-13 18:02:27,999 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) [2022-07-13 18:02:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-07-13 18:02:28,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:02:28,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:28,001 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] [2022-07-13 18:02:28,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:28,224 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 [2022-07-13 18:02:28,225 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2103225754, now seen corresponding path program 5 times [2022-07-13 18:02:28,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:28,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131691279] [2022-07-13 18:02:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:28,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:28,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:28,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:28,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:28,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 18:02:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:28,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:28,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:02:28,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:28,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131691279] [2022-07-13 18:02:28,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131691279] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:28,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324499842] [2022-07-13 18:02:28,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:02:28,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:28,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:28,512 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) [2022-07-13 18:02:28,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 18:02:28,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 18:02:28,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 18:02:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:02:28,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:02:29,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324499842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:29,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:29,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2022-07-13 18:02:29,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465774442] [2022-07-13 18:02:29,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:29,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 18:02:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 18:02:29,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-13 18:02:29,952 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) [2022-07-13 18:02:30,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:30,411 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-07-13 18:02:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 18:02:30,412 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 [2022-07-13 18:02:30,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:30,412 INFO L225 Difference]: With dead ends: 97 [2022-07-13 18:02:30,413 INFO L226 Difference]: Without dead ends: 93 [2022-07-13 18:02:30,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 84 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 18:02:30,413 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:30,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 384 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:02:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-13 18:02:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2022-07-13 18:02:30,419 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) [2022-07-13 18:02:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2022-07-13 18:02:30,419 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 51 [2022-07-13 18:02:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:30,420 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2022-07-13 18:02:30,420 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) [2022-07-13 18:02:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2022-07-13 18:02:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:02:30,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:30,421 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] [2022-07-13 18:02:30,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:30,643 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 [2022-07-13 18:02:30,643 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash -262469082, now seen corresponding path program 6 times [2022-07-13 18:02:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:30,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927532743] [2022-07-13 18:02:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:30,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:30,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:30,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:30,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 18:02:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:30,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:30,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 18:02:30,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927532743] [2022-07-13 18:02:30,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927532743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71662098] [2022-07-13 18:02:30,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:02:30,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:30,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:30,897 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) [2022-07-13 18:02:30,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 18:02:31,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 18:02:31,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:31,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 18:02:31,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 18:02:31,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-13 18:02:32,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71662098] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:32,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:32,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 33 [2022-07-13 18:02:32,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098982608] [2022-07-13 18:02:32,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:32,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 18:02:32,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:32,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 18:02:32,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 18:02:32,139 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) [2022-07-13 18:02:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:32,686 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2022-07-13 18:02:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 18:02:32,687 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 [2022-07-13 18:02:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:32,688 INFO L225 Difference]: With dead ends: 91 [2022-07-13 18:02:32,688 INFO L226 Difference]: Without dead ends: 82 [2022-07-13 18:02:32,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 18:02:32,689 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:32,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 329 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:02:32,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-13 18:02:32,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-07-13 18:02:32,693 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) [2022-07-13 18:02:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-07-13 18:02:32,694 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 51 [2022-07-13 18:02:32,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:32,694 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-07-13 18:02:32,694 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) [2022-07-13 18:02:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-07-13 18:02:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 18:02:32,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:32,694 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] [2022-07-13 18:02:32,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:32,925 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 [2022-07-13 18:02:32,925 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:32,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:32,926 INFO L85 PathProgramCache]: Analyzing trace with hash 334535194, now seen corresponding path program 4 times [2022-07-13 18:02:32,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:32,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990070645] [2022-07-13 18:02:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:32,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:33,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:33,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:33,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:33,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:33,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:02:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:33,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:33,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 18:02:33,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990070645] [2022-07-13 18:02:33,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990070645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164806045] [2022-07-13 18:02:33,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:02:33,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:33,525 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) [2022-07-13 18:02:33,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 18:02:33,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:02:33,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:33,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 18:02:33,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 18:02:34,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:38,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164806045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:38,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:02:38,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-07-13 18:02:38,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088548437] [2022-07-13 18:02:38,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:38,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 18:02:38,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:38,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 18:02:38,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1438, Unknown=2, NotChecked=0, Total=1560 [2022-07-13 18:02:38,854 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) [2022-07-13 18:02:39,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:39,775 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2022-07-13 18:02:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 18:02:39,778 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 [2022-07-13 18:02:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:39,779 INFO L225 Difference]: With dead ends: 106 [2022-07-13 18:02:39,779 INFO L226 Difference]: Without dead ends: 102 [2022-07-13 18:02:39,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=239, Invalid=2209, Unknown=2, NotChecked=0, Total=2450 [2022-07-13 18:02:39,780 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:39,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 441 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:02:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-13 18:02:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2022-07-13 18:02:39,785 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) [2022-07-13 18:02:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2022-07-13 18:02:39,786 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 59 [2022-07-13 18:02:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:39,786 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2022-07-13 18:02:39,787 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) [2022-07-13 18:02:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2022-07-13 18:02:39,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 18:02:39,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:39,795 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] [2022-07-13 18:02:39,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:40,015 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 [2022-07-13 18:02:40,015 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:40,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1972765050, now seen corresponding path program 7 times [2022-07-13 18:02:40,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:40,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074760567] [2022-07-13 18:02:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:40,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:40,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:40,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:40,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:40,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:40,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:02:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:40,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:40,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 18:02:40,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:40,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074760567] [2022-07-13 18:02:40,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074760567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:40,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197563208] [2022-07-13 18:02:40,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 18:02:40,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:40,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:40,340 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) [2022-07-13 18:02:40,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 18:02:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:40,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 18:02:40,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 18:02:40,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 18:02:42,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197563208] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:42,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:42,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2022-07-13 18:02:42,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213899444] [2022-07-13 18:02:42,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:42,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 18:02:42,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:42,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 18:02:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-07-13 18:02:42,006 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) [2022-07-13 18:02:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:42,457 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2022-07-13 18:02:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 18:02:42,458 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 [2022-07-13 18:02:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:42,459 INFO L225 Difference]: With dead ends: 109 [2022-07-13 18:02:42,459 INFO L226 Difference]: Without dead ends: 105 [2022-07-13 18:02:42,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 21 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 18:02:42,460 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:42,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 344 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:02:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-13 18:02:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2022-07-13 18:02:42,466 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) [2022-07-13 18:02:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-07-13 18:02:42,467 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2022-07-13 18:02:42,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:42,468 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-07-13 18:02:42,471 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) [2022-07-13 18:02:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-07-13 18:02:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 18:02:42,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:42,473 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] [2022-07-13 18:02:42,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:42,687 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 [2022-07-13 18:02:42,688 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash 12091098, now seen corresponding path program 8 times [2022-07-13 18:02:42,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:42,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559964400] [2022-07-13 18:02:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:42,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:42,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:42,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:42,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:42,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:42,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:02:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:42,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 18:02:42,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:42,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559964400] [2022-07-13 18:02:42,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559964400] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:42,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609306703] [2022-07-13 18:02:42,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:02:42,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:42,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:42,979 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) [2022-07-13 18:02:43,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 18:02:43,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:02:43,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 18:02:43,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 18:02:43,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 18:02:44,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609306703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:44,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:44,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2022-07-13 18:02:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140600928] [2022-07-13 18:02:44,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:44,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 18:02:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 18:02:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-07-13 18:02:44,711 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) [2022-07-13 18:02:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:45,110 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2022-07-13 18:02:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 18:02:45,110 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 [2022-07-13 18:02:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:45,111 INFO L225 Difference]: With dead ends: 113 [2022-07-13 18:02:45,111 INFO L226 Difference]: Without dead ends: 109 [2022-07-13 18:02:45,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 98 SyntacticMatches, 20 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 18:02:45,112 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 [2022-07-13 18:02:45,113 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] [2022-07-13 18:02:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-13 18:02:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2022-07-13 18:02:45,119 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) [2022-07-13 18:02:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-07-13 18:02:45,119 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2022-07-13 18:02:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:45,120 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-07-13 18:02:45,120 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) [2022-07-13 18:02:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-07-13 18:02:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 18:02:45,121 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:45,121 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] [2022-07-13 18:02:45,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-13 18:02:45,333 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 [2022-07-13 18:02:45,334 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1626138758, now seen corresponding path program 9 times [2022-07-13 18:02:45,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:45,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615310709] [2022-07-13 18:02:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:45,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:45,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:45,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:45,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:45,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:45,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:02:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:45,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:45,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 18:02:45,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615310709] [2022-07-13 18:02:45,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615310709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227636338] [2022-07-13 18:02:45,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:02:45,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:45,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:45,621 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) [2022-07-13 18:02:45,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 18:02:45,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 18:02:45,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:45,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 18:02:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-13 18:02:46,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:50,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227636338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:50,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:02:50,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 34 [2022-07-13 18:02:50,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146947352] [2022-07-13 18:02:50,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:50,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 18:02:50,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:50,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 18:02:50,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1671, Unknown=4, NotChecked=0, Total=1806 [2022-07-13 18:02:50,566 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) [2022-07-13 18:02:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:53,337 INFO L93 Difference]: Finished difference Result 157 states and 208 transitions. [2022-07-13 18:02:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 18:02:53,338 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 [2022-07-13 18:02:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:53,339 INFO L225 Difference]: With dead ends: 157 [2022-07-13 18:02:53,339 INFO L226 Difference]: Without dead ends: 153 [2022-07-13 18:02:53,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=303, Invalid=2885, Unknown=4, NotChecked=0, Total=3192 [2022-07-13 18:02:53,340 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:53,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 522 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 828 Invalid, 0 Unknown, 79 Unchecked, 0.4s Time] [2022-07-13 18:02:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-13 18:02:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2022-07-13 18:02:53,381 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) [2022-07-13 18:02:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2022-07-13 18:02:53,382 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 59 [2022-07-13 18:02:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:53,382 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2022-07-13 18:02:53,382 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) [2022-07-13 18:02:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2022-07-13 18:02:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 18:02:53,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:53,383 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] [2022-07-13 18:02:53,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:53,599 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 [2022-07-13 18:02:53,599 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1786558534, now seen corresponding path program 10 times [2022-07-13 18:02:53,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:53,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697080094] [2022-07-13 18:02:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:53,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:53,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:53,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:53,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:53,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:53,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:02:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:53,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:53,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 18:02:53,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:53,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697080094] [2022-07-13 18:02:53,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697080094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:53,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055824324] [2022-07-13 18:02:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:02:53,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:54,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:54,007 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) [2022-07-13 18:02:54,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 18:02:54,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:02:54,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 18:02:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 18:02:55,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:56,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055824324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:56,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:02:56,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2022-07-13 18:02:56,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309969767] [2022-07-13 18:02:56,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:56,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 18:02:56,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 18:02:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 18:02:56,374 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) [2022-07-13 18:02:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:57,053 INFO L93 Difference]: Finished difference Result 168 states and 229 transitions. [2022-07-13 18:02:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 18:02:57,053 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 [2022-07-13 18:02:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:57,055 INFO L225 Difference]: With dead ends: 168 [2022-07-13 18:02:57,055 INFO L226 Difference]: Without dead ends: 164 [2022-07-13 18:02:57,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=2454, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 18:02:57,056 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-13 18:02:57,056 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] [2022-07-13 18:02:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-13 18:02:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 109. [2022-07-13 18:02:57,084 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) [2022-07-13 18:02:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 145 transitions. [2022-07-13 18:02:57,086 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 145 transitions. Word has length 59 [2022-07-13 18:02:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:57,086 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 145 transitions. [2022-07-13 18:02:57,086 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) [2022-07-13 18:02:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 145 transitions. [2022-07-13 18:02:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-13 18:02:57,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:57,098 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] [2022-07-13 18:02:57,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:57,317 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 [2022-07-13 18:02:57,317 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash 547734810, now seen corresponding path program 11 times [2022-07-13 18:02:57,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:57,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705814980] [2022-07-13 18:02:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:57,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:57,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:02:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:57,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:57,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:57,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:57,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:02:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:57,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:57,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 18:02:57,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:57,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705814980] [2022-07-13 18:02:57,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705814980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:57,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537663301] [2022-07-13 18:02:57,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:02:57,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:57,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:57,643 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) [2022-07-13 18:02:57,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 18:02:57,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 18:02:57,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 18:02:57,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 18:02:58,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 18:03:00,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537663301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:03:00,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:03:00,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 22] total 41 [2022-07-13 18:03:00,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096760966] [2022-07-13 18:03:00,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-13 18:03:00,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-13 18:03:00,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 18:03:00,060 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) [2022-07-13 18:03:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:01,192 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2022-07-13 18:03:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 18:03:01,193 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 [2022-07-13 18:03:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:01,194 INFO L225 Difference]: With dead ends: 201 [2022-07-13 18:03:01,194 INFO L226 Difference]: Without dead ends: 197 [2022-07-13 18:03:01,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 96 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 18:03:01,195 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 18:03:01,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 621 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 18:03:01,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-13 18:03:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 124. [2022-07-13 18:03:01,224 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) [2022-07-13 18:03:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2022-07-13 18:03:01,225 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 59 [2022-07-13 18:03:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:01,226 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2022-07-13 18:03:01,226 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) [2022-07-13 18:03:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2022-07-13 18:03:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 18:03:01,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:01,228 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] [2022-07-13 18:03:01,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 18:03:01,447 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 [2022-07-13 18:03:01,447 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:01,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:01,448 INFO L85 PathProgramCache]: Analyzing trace with hash 789094822, now seen corresponding path program 12 times [2022-07-13 18:03:01,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:01,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710822473] [2022-07-13 18:03:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:01,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:01,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:01,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:01,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:01,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:01,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:01,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 18:03:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:01,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:01,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-13 18:03:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710822473] [2022-07-13 18:03:01,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710822473] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883158229] [2022-07-13 18:03:01,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:03:01,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:01,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:01,818 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) [2022-07-13 18:03:01,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 18:03:02,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-13 18:03:02,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:03:02,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-13 18:03:02,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 18:03:02,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:04,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883158229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:04,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:03:04,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 32 [2022-07-13 18:03:04,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326582645] [2022-07-13 18:03:04,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:04,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 18:03:04,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:04,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 18:03:04,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 18:03:04,608 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) [2022-07-13 18:03:05,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:05,694 INFO L93 Difference]: Finished difference Result 189 states and 265 transitions. [2022-07-13 18:03:05,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 18:03:05,694 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 [2022-07-13 18:03:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:05,696 INFO L225 Difference]: With dead ends: 189 [2022-07-13 18:03:05,696 INFO L226 Difference]: Without dead ends: 185 [2022-07-13 18:03:05,697 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 [2022-07-13 18:03:05,697 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-07-13 18:03:05,697 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] [2022-07-13 18:03:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-13 18:03:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 132. [2022-07-13 18:03:05,729 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) [2022-07-13 18:03:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 182 transitions. [2022-07-13 18:03:05,731 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 182 transitions. Word has length 67 [2022-07-13 18:03:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:05,732 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 182 transitions. [2022-07-13 18:03:05,732 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) [2022-07-13 18:03:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 182 transitions. [2022-07-13 18:03:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 18:03:05,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:05,747 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] [2022-07-13 18:03:05,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 18:03:05,963 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 [2022-07-13 18:03:05,963 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:05,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1906616390, now seen corresponding path program 13 times [2022-07-13 18:03:05,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:05,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164034602] [2022-07-13 18:03:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:05,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:06,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:06,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:06,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:06,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:06,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:06,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 18:03:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:06,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:06,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-13 18:03:06,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:06,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164034602] [2022-07-13 18:03:06,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164034602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:06,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56498564] [2022-07-13 18:03:06,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 18:03:06,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:06,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:06,657 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) [2022-07-13 18:03:06,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 18:03:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:07,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-13 18:03:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 18:03:07,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 18:03:10,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56498564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:03:10,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:03:10,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 25] total 45 [2022-07-13 18:03:10,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218929861] [2022-07-13 18:03:10,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:10,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-13 18:03:10,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:10,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-13 18:03:10,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 18:03:10,070 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) [2022-07-13 18:03:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:11,212 INFO L93 Difference]: Finished difference Result 189 states and 261 transitions. [2022-07-13 18:03:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 18:03:11,212 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 [2022-07-13 18:03:11,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:11,214 INFO L225 Difference]: With dead ends: 189 [2022-07-13 18:03:11,214 INFO L226 Difference]: Without dead ends: 185 [2022-07-13 18:03:11,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 109 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=436, Invalid=3224, Unknown=0, NotChecked=0, Total=3660 [2022-07-13 18:03:11,215 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 97 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 18:03:11,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 713 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 18:03:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-13 18:03:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 111. [2022-07-13 18:03:11,226 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) [2022-07-13 18:03:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 149 transitions. [2022-07-13 18:03:11,227 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 149 transitions. Word has length 67 [2022-07-13 18:03:11,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:11,227 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 149 transitions. [2022-07-13 18:03:11,227 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) [2022-07-13 18:03:11,227 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 149 transitions. [2022-07-13 18:03:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 18:03:11,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:11,228 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] [2022-07-13 18:03:11,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 18:03:11,453 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 [2022-07-13 18:03:11,453 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:11,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1155297274, now seen corresponding path program 14 times [2022-07-13 18:03:11,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:11,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268293939] [2022-07-13 18:03:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:11,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:11,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:11,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:11,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:11,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:11,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:11,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 18:03:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:11,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:11,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-13 18:03:11,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:11,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268293939] [2022-07-13 18:03:11,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268293939] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:11,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540005201] [2022-07-13 18:03:11,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:03:11,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:11,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:11,709 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) [2022-07-13 18:03:11,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 18:03:11,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:03:11,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:03:11,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 18:03:11,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 18:03:12,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 18:03:14,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540005201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:03:14,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:03:14,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 25] total 48 [2022-07-13 18:03:14,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44209388] [2022-07-13 18:03:14,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:14,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 18:03:14,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:14,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 18:03:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2022-07-13 18:03:14,422 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) [2022-07-13 18:03:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:15,233 INFO L93 Difference]: Finished difference Result 183 states and 253 transitions. [2022-07-13 18:03:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 18:03:15,234 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 [2022-07-13 18:03:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:15,235 INFO L225 Difference]: With dead ends: 183 [2022-07-13 18:03:15,235 INFO L226 Difference]: Without dead ends: 179 [2022-07-13 18:03:15,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=396, Invalid=3386, Unknown=0, NotChecked=0, Total=3782 [2022-07-13 18:03:15,237 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:03:15,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 622 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:03:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-13 18:03:15,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 96. [2022-07-13 18:03:15,246 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) [2022-07-13 18:03:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2022-07-13 18:03:15,247 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 67 [2022-07-13 18:03:15,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:15,247 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2022-07-13 18:03:15,248 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) [2022-07-13 18:03:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2022-07-13 18:03:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 18:03:15,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:15,249 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] [2022-07-13 18:03:15,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-13 18:03:15,463 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 [2022-07-13 18:03:15,463 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash -37775706, now seen corresponding path program 15 times [2022-07-13 18:03:15,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:15,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585390658] [2022-07-13 18:03:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:15,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:15,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:15,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:15,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:15,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:15,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:15,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 18:03:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:15,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:15,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 18:03:15,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585390658] [2022-07-13 18:03:15,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585390658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159865633] [2022-07-13 18:03:15,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:03:15,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:15,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:15,734 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) [2022-07-13 18:03:15,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 18:03:16,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 18:03:16,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:03:16,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 18:03:16,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 18:03:16,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:20,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159865633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:20,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:03:20,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2022-07-13 18:03:20,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409251952] [2022-07-13 18:03:20,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:20,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 18:03:20,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:20,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 18:03:20,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1754, Unknown=1, NotChecked=0, Total=1892 [2022-07-13 18:03:20,659 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) [2022-07-13 18:03:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:22,399 INFO L93 Difference]: Finished difference Result 172 states and 231 transitions. [2022-07-13 18:03:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 18:03:22,400 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 [2022-07-13 18:03:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:22,401 INFO L225 Difference]: With dead ends: 172 [2022-07-13 18:03:22,401 INFO L226 Difference]: Without dead ends: 168 [2022-07-13 18:03:22,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=377, Invalid=3528, Unknown=1, NotChecked=0, Total=3906 [2022-07-13 18:03:22,402 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 53 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:03:22,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 462 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 18:03:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-13 18:03:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 63. [2022-07-13 18:03:22,420 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) [2022-07-13 18:03:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-13 18:03:22,424 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 67 [2022-07-13 18:03:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:22,424 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-13 18:03:22,425 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) [2022-07-13 18:03:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-13 18:03:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 18:03:22,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:22,428 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] [2022-07-13 18:03:22,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-13 18:03:22,655 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 [2022-07-13 18:03:22,655 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:22,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:22,656 INFO L85 PathProgramCache]: Analyzing trace with hash -835098444, now seen corresponding path program 5 times [2022-07-13 18:03:22,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:22,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544550162] [2022-07-13 18:03:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:22,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:22,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:22,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:22,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:22,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 18:03:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:22,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:22,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:22,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 18:03:23,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:23,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544550162] [2022-07-13 18:03:23,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544550162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:23,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293725567] [2022-07-13 18:03:23,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:03:23,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:23,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:23,029 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) [2022-07-13 18:03:23,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 18:03:23,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 18:03:23,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:03:23,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 18:03:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 18:03:23,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:25,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293725567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:25,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:03:25,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2022-07-13 18:03:25,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419987519] [2022-07-13 18:03:25,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:25,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 18:03:25,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 18:03:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 18:03:25,198 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) [2022-07-13 18:03:25,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:25,878 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2022-07-13 18:03:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 18:03:25,878 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 [2022-07-13 18:03:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:25,879 INFO L225 Difference]: With dead ends: 85 [2022-07-13 18:03:25,879 INFO L226 Difference]: Without dead ends: 76 [2022-07-13 18:03:25,880 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 [2022-07-13 18:03:25,880 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:03:25,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 392 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:03:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-13 18:03:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2022-07-13 18:03:25,886 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) [2022-07-13 18:03:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-07-13 18:03:25,888 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 58 [2022-07-13 18:03:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:25,889 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-07-13 18:03:25,889 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) [2022-07-13 18:03:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-07-13 18:03:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 18:03:25,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:25,890 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] [2022-07-13 18:03:25,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-13 18:03:26,102 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 [2022-07-13 18:03:26,102 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:26,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:26,102 INFO L85 PathProgramCache]: Analyzing trace with hash -551668204, now seen corresponding path program 16 times [2022-07-13 18:03:26,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:26,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367266247] [2022-07-13 18:03:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:26,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:26,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:26,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:26,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:26,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 18:03:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:26,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:26,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:26,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 18:03:26,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:26,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367266247] [2022-07-13 18:03:26,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367266247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:26,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239578489] [2022-07-13 18:03:26,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:03:26,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:26,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:26,438 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) [2022-07-13 18:03:26,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 18:03:26,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:03:26,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:03:26,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 18:03:26,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 18:03:27,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:28,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239578489] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:28,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:03:28,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2022-07-13 18:03:28,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143855782] [2022-07-13 18:03:28,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:28,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 18:03:28,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:28,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 18:03:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 18:03:28,391 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) [2022-07-13 18:03:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:29,074 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2022-07-13 18:03:29,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 18:03:29,082 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 [2022-07-13 18:03:29,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:29,082 INFO L225 Difference]: With dead ends: 89 [2022-07-13 18:03:29,082 INFO L226 Difference]: Without dead ends: 80 [2022-07-13 18:03:29,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 18:03:29,083 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:03:29,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 435 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:03:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-13 18:03:29,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2022-07-13 18:03:29,099 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) [2022-07-13 18:03:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2022-07-13 18:03:29,100 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 58 [2022-07-13 18:03:29,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:29,100 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2022-07-13 18:03:29,100 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) [2022-07-13 18:03:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2022-07-13 18:03:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 18:03:29,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:29,102 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] [2022-07-13 18:03:29,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-13 18:03:29,314 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 [2022-07-13 18:03:29,314 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:29,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:29,314 INFO L85 PathProgramCache]: Analyzing trace with hash 590358656, now seen corresponding path program 17 times [2022-07-13 18:03:29,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:29,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363430407] [2022-07-13 18:03:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:29,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:29,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:29,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:29,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:29,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:29,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:03:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:29,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:29,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 18:03:29,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:29,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363430407] [2022-07-13 18:03:29,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363430407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:29,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389568804] [2022-07-13 18:03:29,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:03:29,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:29,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:29,690 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) [2022-07-13 18:03:29,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-13 18:03:30,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 18:03:30,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:03:30,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 18:03:30,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 18:03:30,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:33,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389568804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:33,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:03:33,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2022-07-13 18:03:33,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695353138] [2022-07-13 18:03:33,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:33,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 18:03:33,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:33,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 18:03:33,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1283, Unknown=1, NotChecked=0, Total=1406 [2022-07-13 18:03:33,466 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) [2022-07-13 18:03:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:34,143 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-07-13 18:03:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 18:03:34,144 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 [2022-07-13 18:03:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:34,145 INFO L225 Difference]: With dead ends: 90 [2022-07-13 18:03:34,145 INFO L226 Difference]: Without dead ends: 81 [2022-07-13 18:03:34,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=260, Invalid=2091, Unknown=1, NotChecked=0, Total=2352 [2022-07-13 18:03:34,146 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 [2022-07-13 18:03:34,146 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] [2022-07-13 18:03:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-13 18:03:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-07-13 18:03:34,150 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) [2022-07-13 18:03:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-07-13 18:03:34,150 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2022-07-13 18:03:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:34,151 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-07-13 18:03:34,151 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) [2022-07-13 18:03:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-07-13 18:03:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 18:03:34,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:34,174 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] [2022-07-13 18:03:34,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-13 18:03:34,383 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 [2022-07-13 18:03:34,383 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 720804832, now seen corresponding path program 6 times [2022-07-13 18:03:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963327384] [2022-07-13 18:03:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:34,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:34,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:34,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:34,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:34,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:34,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:03:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:34,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:34,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:34,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 18:03:34,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963327384] [2022-07-13 18:03:34,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963327384] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:34,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125464731] [2022-07-13 18:03:34,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:03:34,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:34,713 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) [2022-07-13 18:03:34,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-13 18:03:35,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 18:03:35,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:03:35,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-13 18:03:35,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 18:03:35,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:38,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125464731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:38,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:03:38,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2022-07-13 18:03:38,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896302279] [2022-07-13 18:03:38,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:38,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 18:03:38,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:38,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 18:03:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2022-07-13 18:03:38,532 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) [2022-07-13 18:03:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:38,916 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2022-07-13 18:03:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 18:03:38,916 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 [2022-07-13 18:03:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:38,917 INFO L225 Difference]: With dead ends: 101 [2022-07-13 18:03:38,917 INFO L226 Difference]: Without dead ends: 97 [2022-07-13 18:03:38,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=157, Invalid=1402, Unknown=1, NotChecked=0, Total=1560 [2022-07-13 18:03:38,918 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 29 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:03:38,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 466 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:03:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-13 18:03:38,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2022-07-13 18:03:38,924 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) [2022-07-13 18:03:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-07-13 18:03:38,924 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2022-07-13 18:03:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:38,925 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-07-13 18:03:38,925 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) [2022-07-13 18:03:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-07-13 18:03:38,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 18:03:38,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:38,926 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] [2022-07-13 18:03:38,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-13 18:03:39,143 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 [2022-07-13 18:03:39,143 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:39,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:39,144 INFO L85 PathProgramCache]: Analyzing trace with hash 354934560, now seen corresponding path program 18 times [2022-07-13 18:03:39,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:39,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286112678] [2022-07-13 18:03:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:39,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:39,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:39,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:39,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:39,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:39,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:03:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:39,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:39,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:39,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 18:03:39,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:39,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286112678] [2022-07-13 18:03:39,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286112678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:39,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036061794] [2022-07-13 18:03:39,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:03:39,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:39,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:39,424 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) [2022-07-13 18:03:39,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-13 18:03:39,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-13 18:03:39,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:03:39,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 18:03:39,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 18:03:40,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:43,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036061794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:43,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:03:43,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2022-07-13 18:03:43,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099105231] [2022-07-13 18:03:43,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:43,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-13 18:03:43,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-13 18:03:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1283, Unknown=1, NotChecked=0, Total=1406 [2022-07-13 18:03:43,261 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) [2022-07-13 18:03:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:43,921 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2022-07-13 18:03:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 18:03:43,922 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 [2022-07-13 18:03:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:43,922 INFO L225 Difference]: With dead ends: 102 [2022-07-13 18:03:43,922 INFO L226 Difference]: Without dead ends: 93 [2022-07-13 18:03:43,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 88 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=260, Invalid=2091, Unknown=1, NotChecked=0, Total=2352 [2022-07-13 18:03:43,923 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:03:43,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 496 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:03:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-13 18:03:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2022-07-13 18:03:43,940 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) [2022-07-13 18:03:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-07-13 18:03:43,941 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2022-07-13 18:03:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:43,941 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-07-13 18:03:43,941 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) [2022-07-13 18:03:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-07-13 18:03:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 18:03:43,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:43,943 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] [2022-07-13 18:03:43,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-13 18:03:44,143 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 [2022-07-13 18:03:44,144 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash 485380736, now seen corresponding path program 19 times [2022-07-13 18:03:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:44,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948625361] [2022-07-13 18:03:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:44,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:44,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:44,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:44,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:44,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:03:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:44,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:44,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:44,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-13 18:03:44,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:44,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948625361] [2022-07-13 18:03:44,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948625361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:44,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319719740] [2022-07-13 18:03:44,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 18:03:44,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:44,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:44,461 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) [2022-07-13 18:03:44,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-13 18:03:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:44,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 18:03:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-13 18:03:51,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:53,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319719740] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:53,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:03:53,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 33 [2022-07-13 18:03:53,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289372324] [2022-07-13 18:03:53,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:53,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 18:03:53,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:53,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 18:03:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1589, Unknown=1, NotChecked=0, Total=1722 [2022-07-13 18:03:53,406 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) [2022-07-13 18:03:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:54,246 INFO L93 Difference]: Finished difference Result 129 states and 168 transitions. [2022-07-13 18:03:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 18:03:54,246 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 [2022-07-13 18:03:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:54,247 INFO L225 Difference]: With dead ends: 129 [2022-07-13 18:03:54,247 INFO L226 Difference]: Without dead ends: 125 [2022-07-13 18:03:54,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 85 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=303, Invalid=2666, Unknown=1, NotChecked=0, Total=2970 [2022-07-13 18:03:54,248 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 [2022-07-13 18:03:54,248 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] [2022-07-13 18:03:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-13 18:03:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2022-07-13 18:03:54,256 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) [2022-07-13 18:03:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2022-07-13 18:03:54,256 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 66 [2022-07-13 18:03:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:54,257 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2022-07-13 18:03:54,257 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) [2022-07-13 18:03:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2022-07-13 18:03:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 18:03:54,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:54,258 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] [2022-07-13 18:03:54,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-13 18:03:54,475 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 [2022-07-13 18:03:54,475 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:54,476 INFO L85 PathProgramCache]: Analyzing trace with hash 959666752, now seen corresponding path program 20 times [2022-07-13 18:03:54,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:54,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779183650] [2022-07-13 18:03:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:54,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:54,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:03:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:54,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:54,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:54,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:54,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:03:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:54,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:54,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:54,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-13 18:03:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779183650] [2022-07-13 18:03:54,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779183650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217487294] [2022-07-13 18:03:54,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:03:54,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:54,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:54,752 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) [2022-07-13 18:03:54,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-13 18:03:55,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:03:55,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:03:55,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 18:03:55,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 18:03:57,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:04:03,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217487294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:03,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:04:03,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 33 [2022-07-13 18:04:03,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865305379] [2022-07-13 18:04:03,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:04:03,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 18:04:03,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:04:03,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 18:04:03,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1505, Unknown=2, NotChecked=0, Total=1640 [2022-07-13 18:04:03,604 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) [2022-07-13 18:04:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:04:04,377 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2022-07-13 18:04:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 18:04:04,377 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 [2022-07-13 18:04:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:04:04,378 INFO L225 Difference]: With dead ends: 147 [2022-07-13 18:04:04,378 INFO L226 Difference]: Without dead ends: 143 [2022-07-13 18:04:04,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 87 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=335, Invalid=2743, Unknown=2, NotChecked=0, Total=3080 [2022-07-13 18:04:04,380 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-13 18:04:04,380 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] [2022-07-13 18:04:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-13 18:04:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 99. [2022-07-13 18:04:04,388 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) [2022-07-13 18:04:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2022-07-13 18:04:04,389 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 66 [2022-07-13 18:04:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:04:04,390 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2022-07-13 18:04:04,390 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) [2022-07-13 18:04:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2022-07-13 18:04:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 18:04:04,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:04:04,391 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] [2022-07-13 18:04:04,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-13 18:04:04,615 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 [2022-07-13 18:04:04,615 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:04:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:04:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash 724242656, now seen corresponding path program 21 times [2022-07-13 18:04:04,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:04:04,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869769345] [2022-07-13 18:04:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:04:04,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:04:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:04,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:04:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:04,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:04,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:04,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:04,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 18:04:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:04,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:04,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:04,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 18:04:04,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:04:04,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869769345] [2022-07-13 18:04:04,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869769345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:04,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501323581] [2022-07-13 18:04:04,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:04:04,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:04:04,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:04:04,929 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) [2022-07-13 18:04:04,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-13 18:04:05,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 18:04:05,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:04:05,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-13 18:04:05,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:04:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 18:04:05,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:04:08,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501323581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:08,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:04:08,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2022-07-13 18:04:08,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227455879] [2022-07-13 18:04:08,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:04:08,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 18:04:08,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:04:08,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 18:04:08,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=736, Unknown=2, NotChecked=0, Total=812 [2022-07-13 18:04:08,604 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) [2022-07-13 18:04:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:04:09,068 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2022-07-13 18:04:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 18:04:09,069 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 [2022-07-13 18:04:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:04:09,070 INFO L225 Difference]: With dead ends: 127 [2022-07-13 18:04:09,070 INFO L226 Difference]: Without dead ends: 123 [2022-07-13 18:04:09,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=157, Invalid=1401, Unknown=2, NotChecked=0, Total=1560 [2022-07-13 18:04:09,071 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 [2022-07-13 18:04:09,072 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] [2022-07-13 18:04:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-13 18:04:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 103. [2022-07-13 18:04:09,079 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) [2022-07-13 18:04:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2022-07-13 18:04:09,080 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 66 [2022-07-13 18:04:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:04:09,080 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2022-07-13 18:04:09,081 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) [2022-07-13 18:04:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2022-07-13 18:04:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 18:04:09,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:04:09,082 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] [2022-07-13 18:04:09,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-13 18:04:09,299 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 [2022-07-13 18:04:09,299 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:04:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:04:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1898709812, now seen corresponding path program 7 times [2022-07-13 18:04:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:04:09,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912379891] [2022-07-13 18:04:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:04:09,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:04:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:04:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 18:04:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-13 18:04:09,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:04:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912379891] [2022-07-13 18:04:09,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912379891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180760293] [2022-07-13 18:04:09,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 18:04:09,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:04:09,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:04:09,620 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) [2022-07-13 18:04:09,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-13 18:04:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-13 18:04:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:04:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 18:04:10,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:04:13,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180760293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:13,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:04:13,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2022-07-13 18:04:13,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968879447] [2022-07-13 18:04:13,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:04:13,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 18:04:13,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:04:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 18:04:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1164, Unknown=2, NotChecked=0, Total=1260 [2022-07-13 18:04:13,622 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) [2022-07-13 18:04:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:04:14,534 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2022-07-13 18:04:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 18:04:14,535 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 [2022-07-13 18:04:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:04:14,535 INFO L225 Difference]: With dead ends: 133 [2022-07-13 18:04:14,535 INFO L226 Difference]: Without dead ends: 129 [2022-07-13 18:04:14,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=251, Invalid=2099, Unknown=2, NotChecked=0, Total=2352 [2022-07-13 18:04:14,536 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 [2022-07-13 18:04:14,536 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] [2022-07-13 18:04:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-13 18:04:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 97. [2022-07-13 18:04:14,559 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) [2022-07-13 18:04:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2022-07-13 18:04:14,560 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 74 [2022-07-13 18:04:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:04:14,560 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2022-07-13 18:04:14,561 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) [2022-07-13 18:04:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2022-07-13 18:04:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 18:04:14,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:04:14,562 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] [2022-07-13 18:04:14,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-13 18:04:14,775 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 [2022-07-13 18:04:14,775 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:04:14,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:04:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash -599965996, now seen corresponding path program 22 times [2022-07-13 18:04:14,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:04:14,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136553319] [2022-07-13 18:04:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:04:14,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:04:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:14,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:04:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:15,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:15,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:15,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:15,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:15,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 18:04:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:15,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:15,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:15,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 18:04:15,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:04:15,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136553319] [2022-07-13 18:04:15,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136553319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:15,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022433172] [2022-07-13 18:04:15,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:04:15,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:04:15,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:04:15,321 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) [2022-07-13 18:04:15,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-13 18:04:15,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:04:15,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:04:15,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 18:04:15,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:04:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 18:04:16,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:04:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 18:04:19,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022433172] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:04:19,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:04:19,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 35 [2022-07-13 18:04:19,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315935249] [2022-07-13 18:04:19,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:04:19,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 18:04:19,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:04:19,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 18:04:19,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 18:04:19,127 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) [2022-07-13 18:04:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:04:19,726 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2022-07-13 18:04:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 18:04:19,727 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 [2022-07-13 18:04:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:04:19,728 INFO L225 Difference]: With dead ends: 131 [2022-07-13 18:04:19,728 INFO L226 Difference]: Without dead ends: 127 [2022-07-13 18:04:19,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 24 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2022-07-13 18:04:19,729 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 [2022-07-13 18:04:19,729 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] [2022-07-13 18:04:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-13 18:04:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2022-07-13 18:04:19,737 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) [2022-07-13 18:04:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2022-07-13 18:04:19,737 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 134 transitions. Word has length 74 [2022-07-13 18:04:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:04:19,738 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 134 transitions. [2022-07-13 18:04:19,738 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) [2022-07-13 18:04:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 134 transitions. [2022-07-13 18:04:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 18:04:19,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:04:19,739 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] [2022-07-13 18:04:19,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-13 18:04:19,963 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 [2022-07-13 18:04:19,963 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:04:19,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:04:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash -437615564, now seen corresponding path program 23 times [2022-07-13 18:04:19,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:04:19,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953878143] [2022-07-13 18:04:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:04:19,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:04:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:20,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:04:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:20,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:20,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:20,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:20,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:20,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 18:04:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:20,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:20,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:20,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 18:04:20,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:04:20,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953878143] [2022-07-13 18:04:20,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953878143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:20,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40907090] [2022-07-13 18:04:20,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:04:20,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:04:20,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:04:20,268 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) [2022-07-13 18:04:20,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-13 18:04:20,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-13 18:04:20,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:04:20,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-13 18:04:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:04:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-13 18:04:24,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:04:31,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40907090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:31,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:04:31,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2022-07-13 18:04:31,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490527135] [2022-07-13 18:04:31,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:04:31,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 18:04:31,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:04:31,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 18:04:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1367, Unknown=4, NotChecked=0, Total=1482 [2022-07-13 18:04:31,412 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) [2022-07-13 18:04:32,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:04:32,575 INFO L93 Difference]: Finished difference Result 158 states and 209 transitions. [2022-07-13 18:04:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 18:04:32,576 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 [2022-07-13 18:04:32,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:04:32,577 INFO L225 Difference]: With dead ends: 158 [2022-07-13 18:04:32,577 INFO L226 Difference]: Without dead ends: 154 [2022-07-13 18:04:32,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=298, Invalid=2560, Unknown=4, NotChecked=0, Total=2862 [2022-07-13 18:04:32,578 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 [2022-07-13 18:04:32,578 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] [2022-07-13 18:04:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-13 18:04:32,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 112. [2022-07-13 18:04:32,606 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) [2022-07-13 18:04:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 145 transitions. [2022-07-13 18:04:32,607 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 145 transitions. Word has length 74 [2022-07-13 18:04:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:04:32,608 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 145 transitions. [2022-07-13 18:04:32,608 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) [2022-07-13 18:04:32,608 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 145 transitions. [2022-07-13 18:04:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 18:04:32,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:04:32,609 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] [2022-07-13 18:04:32,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-13 18:04:32,821 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 [2022-07-13 18:04:32,822 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:04:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:04:32,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1410533388, now seen corresponding path program 24 times [2022-07-13 18:04:32,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:04:32,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094454314] [2022-07-13 18:04:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:04:32,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:04:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:32,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 18:04:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:32,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:32,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:33,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:33,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:33,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 18:04:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:33,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:33,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:33,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 18:04:33,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:04:33,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094454314] [2022-07-13 18:04:33,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094454314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:33,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320631121] [2022-07-13 18:04:33,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:04:33,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:04:33,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:04:33,321 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) [2022-07-13 18:04:33,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-13 18:04:33,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-13 18:04:33,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:04:33,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 18:04:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:04:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 44 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 18:04:38,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:06:04,478 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification that was a NOOP. DAG size: 318 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)