./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 6c24879c 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-?-6c24879 [2022-07-12 06:21:55,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 06:21:55,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 06:21:55,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 06:21:55,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 06:21:55,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 06:21:55,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 06:21:55,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 06:21:55,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 06:21:55,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 06:21:55,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 06:21:55,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 06:21:55,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 06:21:55,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 06:21:55,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 06:21:55,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 06:21:55,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 06:21:55,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 06:21:55,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 06:21:55,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 06:21:55,213 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 06:21:55,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 06:21:55,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 06:21:55,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 06:21:55,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 06:21:55,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 06:21:55,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 06:21:55,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 06:21:55,232 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 06:21:55,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 06:21:55,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 06:21:55,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 06:21:55,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 06:21:55,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 06:21:55,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 06:21:55,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 06:21:55,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 06:21:55,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 06:21:55,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 06:21:55,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 06:21:55,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 06:21:55,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 06:21:55,246 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 06:21:55,275 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 06:21:55,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 06:21:55,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 06:21:55,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 06:21:55,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 06:21:55,276 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 06:21:55,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 06:21:55,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 06:21:55,277 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 06:21:55,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 06:21:55,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 06:21:55,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 06:21:55,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 06:21:55,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 06:21:55,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 06:21:55,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 06:21:55,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 06:21:55,278 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 06:21:55,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 06:21:55,279 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 06:21:55,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 06:21:55,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 06:21:55,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 06:21:55,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 06:21:55,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:21:55,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 06:21:55,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 06:21:55,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 06:21:55,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 06:21:55,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 06:21:55,288 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 06:21:55,288 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 06:21:55,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 06:21:55,288 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 [2022-07-12 06:21:55,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 06:21:55,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 06:21:55,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 06:21:55,574 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 06:21:55,575 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 06:21:55,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd02.c [2022-07-12 06:21:55,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a038d840a/3e5cc1c3a66741f380cb3f1e0dc8803a/FLAGc4a193b9d [2022-07-12 06:21:56,227 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 06:21:56,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c [2022-07-12 06:21:56,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a038d840a/3e5cc1c3a66741f380cb3f1e0dc8803a/FLAGc4a193b9d [2022-07-12 06:21:56,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a038d840a/3e5cc1c3a66741f380cb3f1e0dc8803a [2022-07-12 06:21:56,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 06:21:56,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 06:21:56,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 06:21:56,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 06:21:56,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 06:21:56,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:21:56" (1/1) ... [2022-07-12 06:21:56,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7c08f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:56, skipping insertion in model container [2022-07-12 06:21:56,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:21:56" (1/1) ... [2022-07-12 06:21:56,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 06:21:56,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 06:21:56,930 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] [2022-07-12 06:21:56,975 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] [2022-07-12 06:21:56,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:21:56,983 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 06:21:57,000 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] [2022-07-12 06:21:57,012 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] [2022-07-12 06:21:57,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:21:57,026 INFO L208 MainTranslator]: Completed translation [2022-07-12 06:21:57,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57 WrapperNode [2022-07-12 06:21:57,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 06:21:57,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 06:21:57,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 06:21:57,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 06:21:57,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (1/1) ... [2022-07-12 06:21:57,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (1/1) ... [2022-07-12 06:21:57,061 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2022-07-12 06:21:57,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 06:21:57,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 06:21:57,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 06:21:57,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 06:21:57,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (1/1) ... [2022-07-12 06:21:57,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (1/1) ... [2022-07-12 06:21:57,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (1/1) ... [2022-07-12 06:21:57,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (1/1) ... [2022-07-12 06:21:57,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (1/1) ... [2022-07-12 06:21:57,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (1/1) ... [2022-07-12 06:21:57,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (1/1) ... [2022-07-12 06:21:57,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 06:21:57,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 06:21:57,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 06:21:57,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 06:21:57,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (1/1) ... [2022-07-12 06:21:57,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:21:57,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:21:57,157 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) [2022-07-12 06:21:57,182 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 [2022-07-12 06:21:57,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 06:21:57,209 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2022-07-12 06:21:57,210 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2022-07-12 06:21:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 06:21:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2022-07-12 06:21:57,214 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2022-07-12 06:21:57,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 06:21:57,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 06:21:57,293 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 06:21:57,295 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 06:21:57,484 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 06:21:57,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 06:21:57,507 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 06:21:57,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:21:57 BoogieIcfgContainer [2022-07-12 06:21:57,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 06:21:57,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 06:21:57,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 06:21:57,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 06:21:57,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:21:56" (1/3) ... [2022-07-12 06:21:57,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15341fb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:21:57, skipping insertion in model container [2022-07-12 06:21:57,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:57" (2/3) ... [2022-07-12 06:21:57,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15341fb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:21:57, skipping insertion in model container [2022-07-12 06:21:57,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:21:57" (3/3) ... [2022-07-12 06:21:57,517 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd02.c [2022-07-12 06:21:57,530 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 06:21:57,543 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 06:21:57,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 06:21:57,639 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@3b121067, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@36da49c6 [2022-07-12 06:21:57,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 06:21:57,651 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) [2022-07-12 06:21:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 06:21:57,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:57,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:21:57,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:57,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1041004109, now seen corresponding path program 1 times [2022-07-12 06:21:57,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:57,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024176241] [2022-07-12 06:21:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:21:58,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:58,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024176241] [2022-07-12 06:21:58,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024176241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:21:58,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:21:58,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 06:21:58,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195236579] [2022-07-12 06:21:58,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:21:58,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 06:21:58,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:58,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 06:21:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:21:58,082 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) [2022-07-12 06:21:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:58,314 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2022-07-12 06:21:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 06:21:58,322 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 [2022-07-12 06:21:58,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:58,328 INFO L225 Difference]: With dead ends: 78 [2022-07-12 06:21:58,329 INFO L226 Difference]: Without dead ends: 41 [2022-07-12 06:21:58,332 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 [2022-07-12 06:21:58,342 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:21:58,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 133 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 06:21:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-12 06:21:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-12 06:21:58,397 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) [2022-07-12 06:21:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-07-12 06:21:58,400 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2022-07-12 06:21:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:58,401 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-07-12 06:21:58,401 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) [2022-07-12 06:21:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-07-12 06:21:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 06:21:58,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:58,402 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:21:58,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 06:21:58,403 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1602001293, now seen corresponding path program 1 times [2022-07-12 06:21:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:58,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073555309] [2022-07-12 06:21:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:21:58,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:58,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073555309] [2022-07-12 06:21:58,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073555309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:21:58,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:21:58,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 06:21:58,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368477646] [2022-07-12 06:21:58,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:21:58,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 06:21:58,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:58,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 06:21:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:21:58,574 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) [2022-07-12 06:21:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:58,753 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-07-12 06:21:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 06:21:58,754 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 [2022-07-12 06:21:58,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:58,759 INFO L225 Difference]: With dead ends: 59 [2022-07-12 06:21:58,759 INFO L226 Difference]: Without dead ends: 57 [2022-07-12 06:21:58,762 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 [2022-07-12 06:21:58,764 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 [2022-07-12 06:21:58,764 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] [2022-07-12 06:21:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-12 06:21:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-07-12 06:21:58,797 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) [2022-07-12 06:21:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-07-12 06:21:58,802 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2022-07-12 06:21:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:58,815 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-07-12 06:21:58,815 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) [2022-07-12 06:21:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-07-12 06:21:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 06:21:58,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:58,816 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:21:58,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 06:21:58,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:58,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1599171148, now seen corresponding path program 1 times [2022-07-12 06:21:58,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:58,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576760797] [2022-07-12 06:21:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:21:58,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:58,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576760797] [2022-07-12 06:21:58,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576760797] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:21:58,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:21:58,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 06:21:58,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469657664] [2022-07-12 06:21:58,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:21:58,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 06:21:58,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:58,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 06:21:58,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-12 06:21:58,975 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) [2022-07-12 06:21:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:59,094 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2022-07-12 06:21:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 06:21:59,095 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 [2022-07-12 06:21:59,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:59,097 INFO L225 Difference]: With dead ends: 63 [2022-07-12 06:21:59,097 INFO L226 Difference]: Without dead ends: 61 [2022-07-12 06:21:59,097 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 [2022-07-12 06:21:59,098 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:21:59,099 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] [2022-07-12 06:21:59,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-12 06:21:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2022-07-12 06:21:59,110 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) [2022-07-12 06:21:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-12 06:21:59,116 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 14 [2022-07-12 06:21:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:59,116 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-12 06:21:59,117 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) [2022-07-12 06:21:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-12 06:21:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 06:21:59,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:59,124 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] [2022-07-12 06:21:59,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 06:21:59,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:59,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2110562560, now seen corresponding path program 1 times [2022-07-12 06:21:59,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:59,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287672842] [2022-07-12 06:21:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:59,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:21:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 06:21:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:21:59,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287672842] [2022-07-12 06:21:59,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287672842] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:21:59,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:21:59,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 06:21:59,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241244603] [2022-07-12 06:21:59,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:21:59,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 06:21:59,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:59,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 06:21:59,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 06:21:59,265 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) [2022-07-12 06:21:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:59,285 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-07-12 06:21:59,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 06:21:59,286 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 [2022-07-12 06:21:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:59,289 INFO L225 Difference]: With dead ends: 55 [2022-07-12 06:21:59,289 INFO L226 Difference]: Without dead ends: 51 [2022-07-12 06:21:59,289 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 [2022-07-12 06:21:59,298 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 [2022-07-12 06:21:59,299 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] [2022-07-12 06:21:59,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-12 06:21:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-12 06:21:59,310 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) [2022-07-12 06:21:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-07-12 06:21:59,312 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2022-07-12 06:21:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:59,313 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-07-12 06:21:59,313 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) [2022-07-12 06:21:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-07-12 06:21:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 06:21:59,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:59,317 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] [2022-07-12 06:21:59,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 06:21:59,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash -291106652, now seen corresponding path program 1 times [2022-07-12 06:21:59,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:59,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046581431] [2022-07-12 06:21:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:59,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:21:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 06:21:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:21:59,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:59,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046581431] [2022-07-12 06:21:59,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046581431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:21:59,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:21:59,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 06:21:59,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057237472] [2022-07-12 06:21:59,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:21:59,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 06:21:59,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:59,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 06:21:59,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-12 06:21:59,489 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) [2022-07-12 06:21:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:59,633 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-07-12 06:21:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 06:21:59,637 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 [2022-07-12 06:21:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:59,643 INFO L225 Difference]: With dead ends: 69 [2022-07-12 06:21:59,643 INFO L226 Difference]: Without dead ends: 65 [2022-07-12 06:21:59,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-12 06:21:59,647 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 [2022-07-12 06:21:59,648 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] [2022-07-12 06:21:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-12 06:21:59,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2022-07-12 06:21:59,678 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) [2022-07-12 06:21:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-07-12 06:21:59,684 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 21 [2022-07-12 06:21:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:59,684 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-07-12 06:21:59,684 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) [2022-07-12 06:21:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-07-12 06:21:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 06:21:59,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:59,687 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] [2022-07-12 06:21:59,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 06:21:59,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:59,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1709846180, now seen corresponding path program 1 times [2022-07-12 06:21:59,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:59,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56617662] [2022-07-12 06:21:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:59,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:21:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 06:21:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 06:21:59,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:59,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56617662] [2022-07-12 06:21:59,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56617662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:21:59,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:21:59,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 06:21:59,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127024548] [2022-07-12 06:21:59,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:21:59,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 06:21:59,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 06:21:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:21:59,817 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) [2022-07-12 06:21:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:59,854 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2022-07-12 06:21:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 06:21:59,855 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 [2022-07-12 06:21:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:59,856 INFO L225 Difference]: With dead ends: 64 [2022-07-12 06:21:59,856 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 06:21:59,856 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 [2022-07-12 06:21:59,857 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 [2022-07-12 06:21:59,858 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] [2022-07-12 06:21:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 06:21:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-12 06:21:59,893 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) [2022-07-12 06:21:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-07-12 06:21:59,894 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2022-07-12 06:21:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:59,894 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-07-12 06:21:59,895 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) [2022-07-12 06:21:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-07-12 06:21:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 06:21:59,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:59,898 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] [2022-07-12 06:21:59,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 06:21:59,898 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:59,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1148028586, now seen corresponding path program 1 times [2022-07-12 06:21:59,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:59,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516469653] [2022-07-12 06:21:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:59,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:59,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:21:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:00,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-12 06:22:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:00,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:22:00,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:00,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516469653] [2022-07-12 06:22:00,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516469653] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:00,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246274819] [2022-07-12 06:22:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:00,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:00,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:00,120 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) [2022-07-12 06:22:00,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 06:22:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:00,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 06:22:00,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:22:00,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:22:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246274819] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:00,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:00,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2022-07-12 06:22:00,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703194279] [2022-07-12 06:22:00,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 06:22:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 06:22:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-12 06:22:00,753 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) [2022-07-12 06:22:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:00,983 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-07-12 06:22:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 06:22:00,984 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 [2022-07-12 06:22:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:00,985 INFO L225 Difference]: With dead ends: 63 [2022-07-12 06:22:00,985 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 06:22:00,986 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 [2022-07-12 06:22:00,987 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:00,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:22:00,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 06:22:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-07-12 06:22:00,996 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) [2022-07-12 06:22:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-12 06:22:00,997 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2022-07-12 06:22:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:00,997 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-12 06:22:00,998 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) [2022-07-12 06:22:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-12 06:22:00,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 06:22:01,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:01,000 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] [2022-07-12 06:22:01,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:01,223 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 [2022-07-12 06:22:01,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:01,224 INFO L85 PathProgramCache]: Analyzing trace with hash -729806600, now seen corresponding path program 1 times [2022-07-12 06:22:01,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:01,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852908651] [2022-07-12 06:22:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:01,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:01,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:01,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:01,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 06:22:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 06:22:01,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:01,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852908651] [2022-07-12 06:22:01,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852908651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:01,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477192377] [2022-07-12 06:22:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:01,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:01,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:01,343 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) [2022-07-12 06:22:01,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 06:22:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:01,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 06:22:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 06:22:01,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 06:22:01,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477192377] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:01,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:01,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-07-12 06:22:01,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303105254] [2022-07-12 06:22:01,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:01,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 06:22:01,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:01,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 06:22:01,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-12 06:22:01,739 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) [2022-07-12 06:22:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:01,929 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-07-12 06:22:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 06:22:01,930 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 [2022-07-12 06:22:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:01,931 INFO L225 Difference]: With dead ends: 74 [2022-07-12 06:22:01,931 INFO L226 Difference]: Without dead ends: 70 [2022-07-12 06:22:01,932 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 [2022-07-12 06:22:01,932 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 [2022-07-12 06:22:01,932 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] [2022-07-12 06:22:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-12 06:22:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2022-07-12 06:22:01,939 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) [2022-07-12 06:22:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-07-12 06:22:01,940 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2022-07-12 06:22:01,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:01,941 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-07-12 06:22:01,941 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) [2022-07-12 06:22:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-07-12 06:22:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 06:22:01,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:01,942 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] [2022-07-12 06:22:01,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:02,159 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 [2022-07-12 06:22:02,159 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:02,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:02,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1241581992, now seen corresponding path program 1 times [2022-07-12 06:22:02,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:02,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112232864] [2022-07-12 06:22:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:02,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:02,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:02,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:02,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 06:22:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 06:22:02,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:02,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112232864] [2022-07-12 06:22:02,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112232864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:22:02,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:22:02,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 06:22:02,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441776074] [2022-07-12 06:22:02,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:22:02,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 06:22:02,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:02,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 06:22:02,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-12 06:22:02,253 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) [2022-07-12 06:22:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:02,371 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-07-12 06:22:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 06:22:02,372 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 [2022-07-12 06:22:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:02,373 INFO L225 Difference]: With dead ends: 80 [2022-07-12 06:22:02,373 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 06:22:02,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-12 06:22:02,374 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 [2022-07-12 06:22:02,375 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] [2022-07-12 06:22:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 06:22:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2022-07-12 06:22:02,381 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) [2022-07-12 06:22:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2022-07-12 06:22:02,382 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 29 [2022-07-12 06:22:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:02,383 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2022-07-12 06:22:02,383 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) [2022-07-12 06:22:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2022-07-12 06:22:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 06:22:02,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:02,384 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] [2022-07-12 06:22:02,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 06:22:02,385 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2029271682, now seen corresponding path program 1 times [2022-07-12 06:22:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964050279] [2022-07-12 06:22:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:02,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:02,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:02,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:02,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 06:22:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:02,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 06:22:02,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:02,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964050279] [2022-07-12 06:22:02,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964050279] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:02,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561309431] [2022-07-12 06:22:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:02,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:02,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:02,528 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) [2022-07-12 06:22:02,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 06:22:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:02,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 06:22:02,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 06:22:02,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 06:22:03,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561309431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:03,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:03,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 20 [2022-07-12 06:22:03,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339789335] [2022-07-12 06:22:03,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:03,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 06:22:03,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:03,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 06:22:03,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-12 06:22:03,199 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) [2022-07-12 06:22:03,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:03,419 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2022-07-12 06:22:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 06:22:03,419 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 [2022-07-12 06:22:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:03,420 INFO L225 Difference]: With dead ends: 89 [2022-07-12 06:22:03,420 INFO L226 Difference]: Without dead ends: 85 [2022-07-12 06:22:03,421 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 [2022-07-12 06:22:03,421 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 [2022-07-12 06:22:03,421 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] [2022-07-12 06:22:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-12 06:22:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2022-07-12 06:22:03,428 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) [2022-07-12 06:22:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2022-07-12 06:22:03,429 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 36 [2022-07-12 06:22:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:03,429 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2022-07-12 06:22:03,429 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) [2022-07-12 06:22:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2022-07-12 06:22:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 06:22:03,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:03,430 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] [2022-07-12 06:22:03,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 06:22:03,652 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 [2022-07-12 06:22:03,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:03,653 INFO L85 PathProgramCache]: Analyzing trace with hash -122584798, now seen corresponding path program 1 times [2022-07-12 06:22:03,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:03,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113632038] [2022-07-12 06:22:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:03,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:03,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:03,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 06:22:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:03,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:22:03,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:03,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113632038] [2022-07-12 06:22:03,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113632038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:03,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137734016] [2022-07-12 06:22:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:03,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:03,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:03,804 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) [2022-07-12 06:22:03,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 06:22:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:03,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 06:22:03,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:22:03,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:22:04,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137734016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:04,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:04,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2022-07-12 06:22:04,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554045486] [2022-07-12 06:22:04,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:04,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 06:22:04,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:04,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 06:22:04,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-12 06:22:04,147 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) [2022-07-12 06:22:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:04,317 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-07-12 06:22:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 06:22:04,317 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 [2022-07-12 06:22:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:04,318 INFO L225 Difference]: With dead ends: 84 [2022-07-12 06:22:04,318 INFO L226 Difference]: Without dead ends: 75 [2022-07-12 06:22:04,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-07-12 06:22:04,319 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:04,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 119 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:22:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-12 06:22:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-07-12 06:22:04,325 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) [2022-07-12 06:22:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2022-07-12 06:22:04,328 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 36 [2022-07-12 06:22:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:04,328 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2022-07-12 06:22:04,329 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) [2022-07-12 06:22:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2022-07-12 06:22:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 06:22:04,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:04,330 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] [2022-07-12 06:22:04,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:04,547 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 [2022-07-12 06:22:04,547 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1326914756, now seen corresponding path program 1 times [2022-07-12 06:22:04,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:04,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583068851] [2022-07-12 06:22:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:04,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:04,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:04,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:04,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:04,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 06:22:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 06:22:04,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:04,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583068851] [2022-07-12 06:22:04,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583068851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:04,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168403740] [2022-07-12 06:22:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:04,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:04,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:04,743 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) [2022-07-12 06:22:04,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 06:22:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:04,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 06:22:04,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 06:22:05,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 06:22:05,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168403740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:05,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:05,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-07-12 06:22:05,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035640020] [2022-07-12 06:22:05,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:06,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 06:22:06,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 06:22:06,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1349, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 06:22:06,001 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) [2022-07-12 06:22:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:06,508 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2022-07-12 06:22:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 06:22:06,509 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 [2022-07-12 06:22:06,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:06,510 INFO L225 Difference]: With dead ends: 121 [2022-07-12 06:22:06,510 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 06:22:06,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 06:22:06,512 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:06,512 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] [2022-07-12 06:22:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 06:22:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2022-07-12 06:22:06,520 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) [2022-07-12 06:22:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2022-07-12 06:22:06,521 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 37 [2022-07-12 06:22:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:06,521 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2022-07-12 06:22:06,521 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) [2022-07-12 06:22:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2022-07-12 06:22:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 06:22:06,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:06,522 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] [2022-07-12 06:22:06,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:06,743 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 [2022-07-12 06:22:06,743 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash -238590844, now seen corresponding path program 2 times [2022-07-12 06:22:06,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:06,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336990897] [2022-07-12 06:22:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:06,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 06:22:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 06:22:07,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:07,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336990897] [2022-07-12 06:22:07,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336990897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:07,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93833682] [2022-07-12 06:22:07,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:22:07,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:07,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:07,632 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) [2022-07-12 06:22:07,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 06:22:07,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:22:07,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:07,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 06:22:07,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 06:22:07,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 06:22:08,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93833682] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:08,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:08,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15] total 22 [2022-07-12 06:22:08,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153370762] [2022-07-12 06:22:08,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:08,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 06:22:08,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:08,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 06:22:08,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-07-12 06:22:08,505 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) [2022-07-12 06:22:08,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:08,841 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2022-07-12 06:22:08,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 06:22:08,843 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 [2022-07-12 06:22:08,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:08,844 INFO L225 Difference]: With dead ends: 96 [2022-07-12 06:22:08,844 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 06:22:08,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 06:22:08,845 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 [2022-07-12 06:22:08,845 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] [2022-07-12 06:22:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 06:22:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2022-07-12 06:22:08,864 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) [2022-07-12 06:22:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2022-07-12 06:22:08,866 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2022-07-12 06:22:08,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:08,866 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2022-07-12 06:22:08,866 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) [2022-07-12 06:22:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2022-07-12 06:22:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 06:22:08,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:08,868 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] [2022-07-12 06:22:08,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:09,087 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 [2022-07-12 06:22:09,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:09,088 INFO L85 PathProgramCache]: Analyzing trace with hash 861262790, now seen corresponding path program 2 times [2022-07-12 06:22:09,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:09,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377311441] [2022-07-12 06:22:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:09,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:09,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:09,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:09,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:09,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 06:22:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:09,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:09,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:22:09,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:09,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377311441] [2022-07-12 06:22:09,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377311441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:09,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615962908] [2022-07-12 06:22:09,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:22:09,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:09,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:09,518 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) [2022-07-12 06:22:09,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 06:22:09,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:22:09,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:09,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 06:22:09,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:22:09,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:22:10,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615962908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:10,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:10,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2022-07-12 06:22:10,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397938415] [2022-07-12 06:22:10,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:10,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 06:22:10,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 06:22:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-12 06:22:10,906 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) [2022-07-12 06:22:11,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:11,387 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2022-07-12 06:22:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 06:22:11,388 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 [2022-07-12 06:22:11,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:11,389 INFO L225 Difference]: With dead ends: 94 [2022-07-12 06:22:11,389 INFO L226 Difference]: Without dead ends: 90 [2022-07-12 06:22:11,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 06:22:11,390 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:11,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 369 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:22:11,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-12 06:22:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2022-07-12 06:22:11,394 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) [2022-07-12 06:22:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2022-07-12 06:22:11,395 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 51 [2022-07-12 06:22:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:11,398 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2022-07-12 06:22:11,398 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) [2022-07-12 06:22:11,399 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2022-07-12 06:22:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-12 06:22:11,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:11,399 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] [2022-07-12 06:22:11,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:11,600 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 [2022-07-12 06:22:11,600 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash -124726374, now seen corresponding path program 3 times [2022-07-12 06:22:11,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:11,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082550423] [2022-07-12 06:22:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:11,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:11,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:11,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:11,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-12 06:22:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:11,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:11,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:22:11,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:11,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082550423] [2022-07-12 06:22:11,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082550423] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:11,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708466361] [2022-07-12 06:22:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:22:11,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:11,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:11,895 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) [2022-07-12 06:22:11,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 06:22:12,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 06:22:12,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:12,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 06:22:12,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:22:12,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 06:22:13,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708466361] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:13,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:13,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 31 [2022-07-12 06:22:13,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839347150] [2022-07-12 06:22:13,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:13,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 06:22:13,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:13,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 06:22:13,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-07-12 06:22:13,186 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) [2022-07-12 06:22:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:13,618 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-07-12 06:22:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 06:22:13,619 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 [2022-07-12 06:22:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:13,627 INFO L225 Difference]: With dead ends: 84 [2022-07-12 06:22:13,627 INFO L226 Difference]: Without dead ends: 75 [2022-07-12 06:22:13,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 06:22:13,634 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:13,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 259 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:22:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-12 06:22:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-07-12 06:22:13,646 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) [2022-07-12 06:22:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2022-07-12 06:22:13,650 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 43 [2022-07-12 06:22:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:13,651 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2022-07-12 06:22:13,652 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) [2022-07-12 06:22:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2022-07-12 06:22:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 06:22:13,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:13,659 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] [2022-07-12 06:22:13,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 06:22:13,882 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 [2022-07-12 06:22:13,882 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:13,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1270773450, now seen corresponding path program 1 times [2022-07-12 06:22:13,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:13,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693795671] [2022-07-12 06:22:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:13,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:14,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:14,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:14,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:14,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 06:22:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:14,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 06:22:14,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:14,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693795671] [2022-07-12 06:22:14,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693795671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:14,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507107138] [2022-07-12 06:22:14,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:14,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:14,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:14,231 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) [2022-07-12 06:22:14,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 06:22:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:14,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 06:22:14,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 06:22:14,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 06:22:15,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507107138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:15,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:15,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17] total 34 [2022-07-12 06:22:15,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618158665] [2022-07-12 06:22:15,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:15,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 06:22:15,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 06:22:15,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 06:22:15,680 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) [2022-07-12 06:22:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:16,188 INFO L93 Difference]: Finished difference Result 112 states and 148 transitions. [2022-07-12 06:22:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 06:22:16,189 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 [2022-07-12 06:22:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:16,190 INFO L225 Difference]: With dead ends: 112 [2022-07-12 06:22:16,190 INFO L226 Difference]: Without dead ends: 108 [2022-07-12 06:22:16,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1791, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 06:22:16,191 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:16,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 397 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:22:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-12 06:22:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2022-07-12 06:22:16,198 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) [2022-07-12 06:22:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-07-12 06:22:16,199 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 44 [2022-07-12 06:22:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:16,199 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-07-12 06:22:16,199 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) [2022-07-12 06:22:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-07-12 06:22:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 06:22:16,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:16,200 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] [2022-07-12 06:22:16,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-12 06:22:16,417 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 [2022-07-12 06:22:16,417 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:16,417 INFO L85 PathProgramCache]: Analyzing trace with hash 132450678, now seen corresponding path program 2 times [2022-07-12 06:22:16,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:16,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078225751] [2022-07-12 06:22:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:16,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:16,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:16,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:16,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:16,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 06:22:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:16,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 06:22:16,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078225751] [2022-07-12 06:22:16,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078225751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724149343] [2022-07-12 06:22:16,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:22:16,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:16,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:16,543 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) [2022-07-12 06:22:16,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 06:22:16,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:22:16,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:16,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 06:22:16,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 06:22:16,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 06:22:17,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724149343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:17,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:17,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2022-07-12 06:22:17,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37633564] [2022-07-12 06:22:17,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:17,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 06:22:17,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:17,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 06:22:17,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-07-12 06:22:17,344 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) [2022-07-12 06:22:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:17,569 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2022-07-12 06:22:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 06:22:17,570 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 [2022-07-12 06:22:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:17,571 INFO L225 Difference]: With dead ends: 109 [2022-07-12 06:22:17,571 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 06:22:17,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 16 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-07-12 06:22:17,572 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:17,572 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] [2022-07-12 06:22:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 06:22:17,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2022-07-12 06:22:17,578 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) [2022-07-12 06:22:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2022-07-12 06:22:17,579 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 44 [2022-07-12 06:22:17,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:17,579 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2022-07-12 06:22:17,579 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) [2022-07-12 06:22:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2022-07-12 06:22:17,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 06:22:17,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:17,580 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] [2022-07-12 06:22:17,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:17,795 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 [2022-07-12 06:22:17,795 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash 815065250, now seen corresponding path program 3 times [2022-07-12 06:22:17,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:17,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276916741] [2022-07-12 06:22:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:17,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:17,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:17,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:17,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:17,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:22:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:17,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:22:18,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:18,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276916741] [2022-07-12 06:22:18,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276916741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:18,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647969] [2022-07-12 06:22:18,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:22:18,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:18,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:18,004 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) [2022-07-12 06:22:18,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 06:22:18,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 06:22:18,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:18,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 06:22:18,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 06:22:18,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 06:22:23,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:23,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:23,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 21] total 45 [2022-07-12 06:22:23,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185080601] [2022-07-12 06:22:23,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:23,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 06:22:23,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:23,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 06:22:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1829, Unknown=2, NotChecked=0, Total=1980 [2022-07-12 06:22:23,495 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) [2022-07-12 06:22:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:24,690 INFO L93 Difference]: Finished difference Result 148 states and 196 transitions. [2022-07-12 06:22:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 06:22:24,690 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 [2022-07-12 06:22:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:24,692 INFO L225 Difference]: With dead ends: 148 [2022-07-12 06:22:24,692 INFO L226 Difference]: Without dead ends: 144 [2022-07-12 06:22:24,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=340, Invalid=3080, Unknown=2, NotChecked=0, Total=3422 [2022-07-12 06:22:24,693 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:24,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 492 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 775 Invalid, 0 Unknown, 44 Unchecked, 0.6s Time] [2022-07-12 06:22:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-12 06:22:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2022-07-12 06:22:24,700 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) [2022-07-12 06:22:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2022-07-12 06:22:24,701 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 128 transitions. Word has length 52 [2022-07-12 06:22:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:24,701 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 128 transitions. [2022-07-12 06:22:24,702 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) [2022-07-12 06:22:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 128 transitions. [2022-07-12 06:22:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 06:22:24,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:24,722 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] [2022-07-12 06:22:24,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:24,939 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 [2022-07-12 06:22:24,939 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:24,940 INFO L85 PathProgramCache]: Analyzing trace with hash 850048834, now seen corresponding path program 4 times [2022-07-12 06:22:24,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:24,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175829700] [2022-07-12 06:22:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:24,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:24,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:25,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:25,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:25,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:25,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:22:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:25,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:22:25,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:25,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175829700] [2022-07-12 06:22:25,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175829700] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:25,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980000657] [2022-07-12 06:22:25,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:22:25,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:25,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:25,280 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) [2022-07-12 06:22:25,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 06:22:25,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:22:25,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:25,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 06:22:25,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:22:25,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 06:22:27,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980000657] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:27,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:27,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 20] total 37 [2022-07-12 06:22:27,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157553120] [2022-07-12 06:22:27,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:27,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 06:22:27,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:27,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 06:22:27,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 06:22:27,275 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) [2022-07-12 06:22:28,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:28,090 INFO L93 Difference]: Finished difference Result 135 states and 183 transitions. [2022-07-12 06:22:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 06:22:28,091 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 [2022-07-12 06:22:28,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:28,092 INFO L225 Difference]: With dead ends: 135 [2022-07-12 06:22:28,092 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 06:22:28,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=345, Invalid=2205, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 06:22:28,093 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 [2022-07-12 06:22:28,094 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] [2022-07-12 06:22:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 06:22:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 70. [2022-07-12 06:22:28,105 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) [2022-07-12 06:22:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-07-12 06:22:28,107 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 52 [2022-07-12 06:22:28,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:28,108 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-07-12 06:22:28,108 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) [2022-07-12 06:22:28,108 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-07-12 06:22:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 06:22:28,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:28,109 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] [2022-07-12 06:22:28,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:28,323 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 [2022-07-12 06:22:28,323 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2103225754, now seen corresponding path program 5 times [2022-07-12 06:22:28,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:28,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378859571] [2022-07-12 06:22:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:28,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:28,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:28,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:28,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 06:22:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:28,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:28,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:22:28,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:28,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378859571] [2022-07-12 06:22:28,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378859571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901201486] [2022-07-12 06:22:28,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:22:28,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:28,564 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) [2022-07-12 06:22:28,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 06:22:28,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 06:22:28,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:28,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 06:22:28,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:22:28,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:22:29,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901201486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:29,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:29,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2022-07-12 06:22:29,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168875116] [2022-07-12 06:22:29,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:29,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 06:22:29,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:29,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 06:22:29,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-12 06:22:29,772 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) [2022-07-12 06:22:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:30,147 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-07-12 06:22:30,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 06:22:30,147 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 [2022-07-12 06:22:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:30,148 INFO L225 Difference]: With dead ends: 97 [2022-07-12 06:22:30,148 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 06:22:30,149 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 [2022-07-12 06:22:30,149 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:30,149 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] [2022-07-12 06:22:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 06:22:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2022-07-12 06:22:30,156 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) [2022-07-12 06:22:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2022-07-12 06:22:30,158 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 51 [2022-07-12 06:22:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:30,159 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2022-07-12 06:22:30,159 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) [2022-07-12 06:22:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2022-07-12 06:22:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 06:22:30,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:30,160 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] [2022-07-12 06:22:30,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:30,375 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 [2022-07-12 06:22:30,375 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:30,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:30,376 INFO L85 PathProgramCache]: Analyzing trace with hash -262469082, now seen corresponding path program 6 times [2022-07-12 06:22:30,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:30,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725073580] [2022-07-12 06:22:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:30,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:30,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:30,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:30,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:30,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 06:22:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:30,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:30,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 06:22:30,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:30,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725073580] [2022-07-12 06:22:30,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725073580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:30,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214906711] [2022-07-12 06:22:30,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:22:30,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:30,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:30,588 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) [2022-07-12 06:22:30,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 06:22:30,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 06:22:30,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:30,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 06:22:30,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 06:22:30,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 06:22:31,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214906711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:31,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:31,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 33 [2022-07-12 06:22:31,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8145763] [2022-07-12 06:22:31,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:31,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 06:22:31,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:31,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 06:22:31,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 06:22:31,750 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) [2022-07-12 06:22:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:32,124 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2022-07-12 06:22:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 06:22:32,124 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 [2022-07-12 06:22:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:32,125 INFO L225 Difference]: With dead ends: 91 [2022-07-12 06:22:32,125 INFO L226 Difference]: Without dead ends: 82 [2022-07-12 06:22:32,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 06:22:32,127 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:32,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 329 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 06:22:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-12 06:22:32,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-07-12 06:22:32,131 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) [2022-07-12 06:22:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-07-12 06:22:32,132 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 51 [2022-07-12 06:22:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:32,132 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-07-12 06:22:32,132 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) [2022-07-12 06:22:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-07-12 06:22:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 06:22:32,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:32,133 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] [2022-07-12 06:22:32,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:32,355 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 [2022-07-12 06:22:32,355 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:32,356 INFO L85 PathProgramCache]: Analyzing trace with hash 334535194, now seen corresponding path program 4 times [2022-07-12 06:22:32,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:32,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87736254] [2022-07-12 06:22:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:32,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:32,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:32,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:32,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:32,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:32,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:22:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:32,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:32,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 06:22:32,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:32,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87736254] [2022-07-12 06:22:32,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87736254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:32,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484754205] [2022-07-12 06:22:32,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:22:32,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:32,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:32,607 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) [2022-07-12 06:22:32,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 06:22:32,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:22:32,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:32,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 06:22:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 06:22:33,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:35,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484754205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:35,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:22:35,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-07-12 06:22:35,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438806056] [2022-07-12 06:22:35,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:35,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 06:22:35,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 06:22:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 06:22:35,200 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) [2022-07-12 06:22:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:35,781 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2022-07-12 06:22:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 06:22:35,787 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 [2022-07-12 06:22:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:35,791 INFO L225 Difference]: With dead ends: 106 [2022-07-12 06:22:35,791 INFO L226 Difference]: Without dead ends: 102 [2022-07-12 06:22:35,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=239, Invalid=2211, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 06:22:35,794 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:35,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 441 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:22:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-12 06:22:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2022-07-12 06:22:35,806 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) [2022-07-12 06:22:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2022-07-12 06:22:35,807 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 59 [2022-07-12 06:22:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:35,807 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2022-07-12 06:22:35,807 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) [2022-07-12 06:22:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2022-07-12 06:22:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 06:22:35,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:35,809 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] [2022-07-12 06:22:35,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:36,031 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 [2022-07-12 06:22:36,031 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1972765050, now seen corresponding path program 7 times [2022-07-12 06:22:36,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:36,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306077015] [2022-07-12 06:22:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:36,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:36,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:36,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:36,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:36,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:36,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:22:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:36,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:36,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 06:22:36,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:36,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306077015] [2022-07-12 06:22:36,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306077015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:36,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040167265] [2022-07-12 06:22:36,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:22:36,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:36,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:36,304 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) [2022-07-12 06:22:36,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 06:22:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 06:22:36,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 06:22:37,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 06:22:38,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040167265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:38,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:38,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2022-07-12 06:22:38,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587848244] [2022-07-12 06:22:38,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:38,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 06:22:38,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 06:22:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-07-12 06:22:38,680 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) [2022-07-12 06:22:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:39,117 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2022-07-12 06:22:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 06:22:39,117 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 [2022-07-12 06:22:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:39,118 INFO L225 Difference]: With dead ends: 109 [2022-07-12 06:22:39,118 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 06:22:39,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 21 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 06:22:39,119 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 [2022-07-12 06:22:39,119 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] [2022-07-12 06:22:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 06:22:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2022-07-12 06:22:39,134 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) [2022-07-12 06:22:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-07-12 06:22:39,145 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2022-07-12 06:22:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:39,145 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-07-12 06:22:39,145 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) [2022-07-12 06:22:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-07-12 06:22:39,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 06:22:39,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:39,146 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] [2022-07-12 06:22:39,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:39,347 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 [2022-07-12 06:22:39,347 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash 12091098, now seen corresponding path program 8 times [2022-07-12 06:22:39,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:39,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238986266] [2022-07-12 06:22:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:39,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:39,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:39,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:39,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:22:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:39,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:39,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 06:22:39,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:39,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238986266] [2022-07-12 06:22:39,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238986266] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:39,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900333328] [2022-07-12 06:22:39,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:22:39,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:39,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:39,601 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) [2022-07-12 06:22:39,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 06:22:39,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:22:39,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:39,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 06:22:39,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 06:22:40,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 06:22:41,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900333328] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:41,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:41,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2022-07-12 06:22:41,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762589852] [2022-07-12 06:22:41,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:41,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 06:22:41,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:41,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 06:22:41,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-07-12 06:22:41,527 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) [2022-07-12 06:22:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:42,364 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2022-07-12 06:22:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 06:22:42,365 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 [2022-07-12 06:22:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:42,366 INFO L225 Difference]: With dead ends: 113 [2022-07-12 06:22:42,366 INFO L226 Difference]: Without dead ends: 109 [2022-07-12 06:22:42,366 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 [2022-07-12 06:22:42,367 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:42,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 444 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 06:22:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-12 06:22:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2022-07-12 06:22:42,373 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) [2022-07-12 06:22:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-07-12 06:22:42,374 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2022-07-12 06:22:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:42,374 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-07-12 06:22:42,374 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) [2022-07-12 06:22:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-07-12 06:22:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 06:22:42,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:42,375 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] [2022-07-12 06:22:42,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:42,589 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 [2022-07-12 06:22:42,589 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:42,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1626138758, now seen corresponding path program 9 times [2022-07-12 06:22:42,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:42,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422640689] [2022-07-12 06:22:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:42,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:42,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:42,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:42,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:42,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:42,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:22:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:42,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:42,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 06:22:42,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:42,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422640689] [2022-07-12 06:22:42,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422640689] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:42,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799568598] [2022-07-12 06:22:42,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:22:42,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:42,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:42,912 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) [2022-07-12 06:22:42,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 06:22:43,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 06:22:43,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:43,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 06:22:43,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-12 06:22:45,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:48,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799568598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:48,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:22:48,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 34 [2022-07-12 06:22:48,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451218085] [2022-07-12 06:22:48,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:48,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 06:22:48,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:48,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 06:22:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1672, Unknown=3, NotChecked=0, Total=1806 [2022-07-12 06:22:48,506 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) [2022-07-12 06:22:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:49,748 INFO L93 Difference]: Finished difference Result 157 states and 208 transitions. [2022-07-12 06:22:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 06:22:49,749 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 [2022-07-12 06:22:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:49,751 INFO L225 Difference]: With dead ends: 157 [2022-07-12 06:22:49,751 INFO L226 Difference]: Without dead ends: 153 [2022-07-12 06:22:49,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=303, Invalid=2886, Unknown=3, NotChecked=0, Total=3192 [2022-07-12 06:22:49,753 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 [2022-07-12 06:22:49,753 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] [2022-07-12 06:22:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-12 06:22:49,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2022-07-12 06:22:49,761 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) [2022-07-12 06:22:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2022-07-12 06:22:49,762 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 59 [2022-07-12 06:22:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:49,767 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2022-07-12 06:22:49,767 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) [2022-07-12 06:22:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2022-07-12 06:22:49,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 06:22:49,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:49,768 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] [2022-07-12 06:22:49,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-12 06:22:49,975 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 [2022-07-12 06:22:49,975 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:49,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1786558534, now seen corresponding path program 10 times [2022-07-12 06:22:49,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:49,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47222827] [2022-07-12 06:22:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:49,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:50,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:50,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:50,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:50,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:50,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:22:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:50,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:50,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 06:22:50,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:50,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47222827] [2022-07-12 06:22:50,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47222827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:50,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363975147] [2022-07-12 06:22:50,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:22:50,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:50,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:50,253 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) [2022-07-12 06:22:50,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 06:22:50,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:22:50,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:50,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 06:22:50,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-12 06:22:51,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:52,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363975147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:52,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:22:52,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2022-07-12 06:22:52,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843409496] [2022-07-12 06:22:52,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:52,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 06:22:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 06:22:52,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1427, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 06:22:52,270 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) [2022-07-12 06:22:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:52,913 INFO L93 Difference]: Finished difference Result 168 states and 229 transitions. [2022-07-12 06:22:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 06:22:52,913 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 [2022-07-12 06:22:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:52,915 INFO L225 Difference]: With dead ends: 168 [2022-07-12 06:22:52,915 INFO L226 Difference]: Without dead ends: 164 [2022-07-12 06:22:52,916 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 [2022-07-12 06:22:52,916 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 [2022-07-12 06:22:52,916 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] [2022-07-12 06:22:52,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-12 06:22:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 109. [2022-07-12 06:22:52,927 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) [2022-07-12 06:22:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 145 transitions. [2022-07-12 06:22:52,928 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 145 transitions. Word has length 59 [2022-07-12 06:22:52,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:52,928 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 145 transitions. [2022-07-12 06:22:52,929 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) [2022-07-12 06:22:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 145 transitions. [2022-07-12 06:22:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 06:22:52,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:52,930 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] [2022-07-12 06:22:52,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:53,157 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 [2022-07-12 06:22:53,157 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:53,158 INFO L85 PathProgramCache]: Analyzing trace with hash 547734810, now seen corresponding path program 11 times [2022-07-12 06:22:53,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:53,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203895144] [2022-07-12 06:22:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:53,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:53,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:53,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:53,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:53,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:53,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:22:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:53,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:53,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 06:22:53,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203895144] [2022-07-12 06:22:53,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203895144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:53,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211488608] [2022-07-12 06:22:53,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:22:53,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:53,416 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) [2022-07-12 06:22:53,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 06:22:53,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 06:22:53,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:53,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 06:22:53,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 06:22:53,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 06:22:55,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211488608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:55,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:55,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 22] total 41 [2022-07-12 06:22:55,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197233722] [2022-07-12 06:22:55,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:55,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 06:22:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 06:22:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 06:22:55,286 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) [2022-07-12 06:22:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:56,040 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2022-07-12 06:22:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 06:22:56,041 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 [2022-07-12 06:22:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:56,042 INFO L225 Difference]: With dead ends: 201 [2022-07-12 06:22:56,042 INFO L226 Difference]: Without dead ends: 197 [2022-07-12 06:22:56,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 96 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 06:22:56,043 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:56,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 621 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 06:22:56,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-12 06:22:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 124. [2022-07-12 06:22:56,054 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) [2022-07-12 06:22:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2022-07-12 06:22:56,055 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 59 [2022-07-12 06:22:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:56,056 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2022-07-12 06:22:56,056 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) [2022-07-12 06:22:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2022-07-12 06:22:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 06:22:56,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:56,057 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] [2022-07-12 06:22:56,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:56,283 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 [2022-07-12 06:22:56,284 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 789094822, now seen corresponding path program 12 times [2022-07-12 06:22:56,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054112238] [2022-07-12 06:22:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:56,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:56,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:56,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:56,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:56,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:56,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:22:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:56,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:56,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-12 06:22:56,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:56,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054112238] [2022-07-12 06:22:56,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054112238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:56,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587926530] [2022-07-12 06:22:56,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:22:56,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:56,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:56,513 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) [2022-07-12 06:22:56,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 06:22:56,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 06:22:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:56,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 06:22:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 06:22:57,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:58,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587926530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:58,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:22:58,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 32 [2022-07-12 06:22:58,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113303451] [2022-07-12 06:22:58,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:58,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 06:22:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 06:22:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 06:22:58,728 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) [2022-07-12 06:22:59,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:59,680 INFO L93 Difference]: Finished difference Result 189 states and 265 transitions. [2022-07-12 06:22:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 06:22:59,681 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 [2022-07-12 06:22:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:59,682 INFO L225 Difference]: With dead ends: 189 [2022-07-12 06:22:59,682 INFO L226 Difference]: Without dead ends: 185 [2022-07-12 06:22:59,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 81 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=340, Invalid=2740, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 06:22:59,684 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 [2022-07-12 06:22:59,684 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] [2022-07-12 06:22:59,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-12 06:22:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 132. [2022-07-12 06:22:59,697 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) [2022-07-12 06:22:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 182 transitions. [2022-07-12 06:22:59,698 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 182 transitions. Word has length 67 [2022-07-12 06:22:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:59,698 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 182 transitions. [2022-07-12 06:22:59,698 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) [2022-07-12 06:22:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 182 transitions. [2022-07-12 06:22:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 06:22:59,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:59,700 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] [2022-07-12 06:22:59,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-12 06:22:59,919 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 [2022-07-12 06:22:59,919 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1906616390, now seen corresponding path program 13 times [2022-07-12 06:22:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:59,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144176958] [2022-07-12 06:22:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:59,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:59,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:22:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:59,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:59,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:00,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:00,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:23:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:00,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:00,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 06:23:00,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:00,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144176958] [2022-07-12 06:23:00,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144176958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:00,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232284022] [2022-07-12 06:23:00,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:23:00,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:00,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:00,219 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) [2022-07-12 06:23:00,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 06:23:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 06:23:00,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 06:23:00,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 06:23:02,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232284022] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:23:02,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:23:02,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 25] total 45 [2022-07-12 06:23:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147625285] [2022-07-12 06:23:02,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:02,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 06:23:02,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 06:23:02,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 06:23:02,795 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) [2022-07-12 06:23:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:03,770 INFO L93 Difference]: Finished difference Result 189 states and 261 transitions. [2022-07-12 06:23:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 06:23:03,771 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 [2022-07-12 06:23:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:03,775 INFO L225 Difference]: With dead ends: 189 [2022-07-12 06:23:03,776 INFO L226 Difference]: Without dead ends: 185 [2022-07-12 06:23:03,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 109 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=436, Invalid=3224, Unknown=0, NotChecked=0, Total=3660 [2022-07-12 06:23:03,782 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:03,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 713 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 06:23:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-12 06:23:03,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 111. [2022-07-12 06:23:03,794 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) [2022-07-12 06:23:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 149 transitions. [2022-07-12 06:23:03,795 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 149 transitions. Word has length 67 [2022-07-12 06:23:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:03,795 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 149 transitions. [2022-07-12 06:23:03,795 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) [2022-07-12 06:23:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 149 transitions. [2022-07-12 06:23:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 06:23:03,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:03,797 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] [2022-07-12 06:23:03,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-12 06:23:04,011 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 [2022-07-12 06:23:04,011 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:04,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:04,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1155297274, now seen corresponding path program 14 times [2022-07-12 06:23:04,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:04,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761217392] [2022-07-12 06:23:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:04,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:04,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:04,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:04,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:04,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:04,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:04,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:23:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:04,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:04,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-12 06:23:04,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:04,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761217392] [2022-07-12 06:23:04,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761217392] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:04,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767467557] [2022-07-12 06:23:04,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:23:04,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:04,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:04,272 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) [2022-07-12 06:23:04,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 06:23:04,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:23:04,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 06:23:04,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 06:23:04,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 06:23:06,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767467557] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:23:06,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:23:06,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 25] total 48 [2022-07-12 06:23:06,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489490440] [2022-07-12 06:23:06,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:06,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-12 06:23:06,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:06,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-12 06:23:06,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 06:23:06,882 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) [2022-07-12 06:23:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:07,636 INFO L93 Difference]: Finished difference Result 183 states and 253 transitions. [2022-07-12 06:23:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 06:23:07,637 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 [2022-07-12 06:23:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:07,638 INFO L225 Difference]: With dead ends: 183 [2022-07-12 06:23:07,638 INFO L226 Difference]: Without dead ends: 179 [2022-07-12 06:23:07,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=3386, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 06:23:07,639 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-07-12 06:23:07,640 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] [2022-07-12 06:23:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-12 06:23:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 96. [2022-07-12 06:23:07,649 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) [2022-07-12 06:23:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2022-07-12 06:23:07,650 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 67 [2022-07-12 06:23:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:07,650 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2022-07-12 06:23:07,650 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) [2022-07-12 06:23:07,650 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2022-07-12 06:23:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 06:23:07,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:07,651 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] [2022-07-12 06:23:07,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-12 06:23:07,871 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 [2022-07-12 06:23:07,871 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash -37775706, now seen corresponding path program 15 times [2022-07-12 06:23:07,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728231599] [2022-07-12 06:23:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:07,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:07,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:07,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:07,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:08,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:08,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:23:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:08,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:08,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 06:23:08,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:08,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728231599] [2022-07-12 06:23:08,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728231599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:08,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664915520] [2022-07-12 06:23:08,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:23:08,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:08,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:08,156 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) [2022-07-12 06:23:08,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 06:23:08,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 06:23:08,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 06:23:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 06:23:08,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:18,493 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 43 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 06:23:20,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664915520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:20,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:23:20,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2022-07-12 06:23:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748399101] [2022-07-12 06:23:20,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:20,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 06:23:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 06:23:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1754, Unknown=1, NotChecked=0, Total=1892 [2022-07-12 06:23:20,935 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) [2022-07-12 06:23:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:21,892 INFO L93 Difference]: Finished difference Result 172 states and 231 transitions. [2022-07-12 06:23:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 06:23:21,893 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 [2022-07-12 06:23:21,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:21,894 INFO L225 Difference]: With dead ends: 172 [2022-07-12 06:23:21,894 INFO L226 Difference]: Without dead ends: 168 [2022-07-12 06:23:21,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=377, Invalid=3528, Unknown=1, NotChecked=0, Total=3906 [2022-07-12 06:23:21,895 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 53 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:21,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 462 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 06:23:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-12 06:23:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 63. [2022-07-12 06:23:21,901 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) [2022-07-12 06:23:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-12 06:23:21,902 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 67 [2022-07-12 06:23:21,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:21,902 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-12 06:23:21,902 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) [2022-07-12 06:23:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-12 06:23:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 06:23:21,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:21,903 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] [2022-07-12 06:23:21,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 06:23:22,120 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 [2022-07-12 06:23:22,120 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash -835098444, now seen corresponding path program 5 times [2022-07-12 06:23:22,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:22,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954682224] [2022-07-12 06:23:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:22,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:22,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:22,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:22,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:22,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 06:23:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:22,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:22,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:22,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 06:23:22,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:22,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954682224] [2022-07-12 06:23:22,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954682224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:22,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427288540] [2022-07-12 06:23:22,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:23:22,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:22,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:22,357 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) [2022-07-12 06:23:22,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 06:23:22,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 06:23:22,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:22,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 06:23:22,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 06:23:22,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:23,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427288540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:23,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:23:23,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2022-07-12 06:23:23,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227630792] [2022-07-12 06:23:23,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:23,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 06:23:23,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:23,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 06:23:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 06:23:23,929 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) [2022-07-12 06:23:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:24,391 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2022-07-12 06:23:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 06:23:24,391 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 [2022-07-12 06:23:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:24,392 INFO L225 Difference]: With dead ends: 85 [2022-07-12 06:23:24,392 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 06:23:24,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 77 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 06:23:24,395 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:24,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 392 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 06:23:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 06:23:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2022-07-12 06:23:24,401 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) [2022-07-12 06:23:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-07-12 06:23:24,402 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 58 [2022-07-12 06:23:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:24,402 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-07-12 06:23:24,402 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) [2022-07-12 06:23:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-07-12 06:23:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 06:23:24,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:24,403 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] [2022-07-12 06:23:24,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 06:23:24,619 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 [2022-07-12 06:23:24,619 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash -551668204, now seen corresponding path program 16 times [2022-07-12 06:23:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:24,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678066972] [2022-07-12 06:23:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:24,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:24,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:24,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:24,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:24,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-12 06:23:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:24,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:24,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:24,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 06:23:24,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:24,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678066972] [2022-07-12 06:23:24,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678066972] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:24,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669584327] [2022-07-12 06:23:24,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:23:24,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:24,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:24,859 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) [2022-07-12 06:23:24,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 06:23:25,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:23:25,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:25,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 06:23:25,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-12 06:23:25,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:26,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669584327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:26,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:23:26,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2022-07-12 06:23:26,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749456062] [2022-07-12 06:23:26,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:26,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 06:23:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 06:23:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 06:23:26,451 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) [2022-07-12 06:23:26,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:26,929 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2022-07-12 06:23:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 06:23:26,930 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 [2022-07-12 06:23:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:26,931 INFO L225 Difference]: With dead ends: 89 [2022-07-12 06:23:26,931 INFO L226 Difference]: Without dead ends: 80 [2022-07-12 06:23:26,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 06:23:26,931 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:26,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 435 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:23:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-12 06:23:26,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2022-07-12 06:23:26,935 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) [2022-07-12 06:23:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2022-07-12 06:23:26,936 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 58 [2022-07-12 06:23:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:26,936 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2022-07-12 06:23:26,936 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) [2022-07-12 06:23:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2022-07-12 06:23:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 06:23:26,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:26,937 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] [2022-07-12 06:23:26,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-12 06:23:27,155 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 [2022-07-12 06:23:27,155 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash 590358656, now seen corresponding path program 17 times [2022-07-12 06:23:27,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:27,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832274764] [2022-07-12 06:23:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:27,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:27,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:27,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:27,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:27,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:27,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:23:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:27,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:27,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:27,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 06:23:27,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:27,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832274764] [2022-07-12 06:23:27,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832274764] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:27,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364947062] [2022-07-12 06:23:27,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:23:27,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:27,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:27,408 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) [2022-07-12 06:23:27,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 06:23:27,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 06:23:27,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:27,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 06:23:27,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 06:23:28,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:30,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364947062] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:30,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:23:30,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2022-07-12 06:23:30,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905004162] [2022-07-12 06:23:30,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:30,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 06:23:30,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 06:23:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1283, Unknown=1, NotChecked=0, Total=1406 [2022-07-12 06:23:30,355 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) [2022-07-12 06:23:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:30,896 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2022-07-12 06:23:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 06:23:30,897 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 [2022-07-12 06:23:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:30,897 INFO L225 Difference]: With dead ends: 90 [2022-07-12 06:23:30,897 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 06:23:30,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=260, Invalid=2091, Unknown=1, NotChecked=0, Total=2352 [2022-07-12 06:23:30,898 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:30,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 529 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:23:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 06:23:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-07-12 06:23:30,902 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) [2022-07-12 06:23:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-07-12 06:23:30,903 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2022-07-12 06:23:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:30,903 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-07-12 06:23:30,903 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) [2022-07-12 06:23:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-07-12 06:23:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 06:23:30,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:30,904 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] [2022-07-12 06:23:30,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-12 06:23:31,123 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 [2022-07-12 06:23:31,123 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash 720804832, now seen corresponding path program 6 times [2022-07-12 06:23:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:31,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945255572] [2022-07-12 06:23:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:31,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:31,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:31,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:31,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:31,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:31,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:23:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:31,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:31,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:31,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-12 06:23:31,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:31,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945255572] [2022-07-12 06:23:31,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945255572] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:31,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963684031] [2022-07-12 06:23:31,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:23:31,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:31,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:31,355 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) [2022-07-12 06:23:31,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 06:23:31,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 06:23:31,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:31,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 06:23:31,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-12 06:23:31,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:34,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963684031] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:34,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:23:34,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2022-07-12 06:23:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446565547] [2022-07-12 06:23:34,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:34,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 06:23:34,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 06:23:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2022-07-12 06:23:34,501 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) [2022-07-12 06:23:34,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:34,886 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2022-07-12 06:23:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 06:23:34,886 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 [2022-07-12 06:23:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:34,887 INFO L225 Difference]: With dead ends: 101 [2022-07-12 06:23:34,887 INFO L226 Difference]: Without dead ends: 97 [2022-07-12 06:23:34,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=157, Invalid=1402, Unknown=1, NotChecked=0, Total=1560 [2022-07-12 06:23:34,887 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 [2022-07-12 06:23:34,888 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] [2022-07-12 06:23:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-12 06:23:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2022-07-12 06:23:34,893 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) [2022-07-12 06:23:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-07-12 06:23:34,894 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2022-07-12 06:23:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:34,894 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-07-12 06:23:34,894 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) [2022-07-12 06:23:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-07-12 06:23:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 06:23:34,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:34,895 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] [2022-07-12 06:23:34,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 06:23:35,111 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 [2022-07-12 06:23:35,111 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 354934560, now seen corresponding path program 18 times [2022-07-12 06:23:35,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:35,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024288971] [2022-07-12 06:23:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:35,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:35,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:35,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:35,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:35,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:35,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:23:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:35,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:35,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:35,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 06:23:35,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024288971] [2022-07-12 06:23:35,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024288971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375851760] [2022-07-12 06:23:35,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:23:35,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:35,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:35,404 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) [2022-07-12 06:23:35,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 06:23:35,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 06:23:35,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 06:23:35,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 06:23:36,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 06:23:37,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375851760] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:23:37,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:23:37,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 22] total 41 [2022-07-12 06:23:37,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696648370] [2022-07-12 06:23:37,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:37,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 06:23:37,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 06:23:37,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 06:23:37,976 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 41 states, 36 states have (on average 2.361111111111111) internal successors, (85), 32 states have internal predecessors, (85), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-12 06:23:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:38,530 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2022-07-12 06:23:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 06:23:38,531 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 2.361111111111111) internal successors, (85), 32 states have internal predecessors, (85), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) Word has length 66 [2022-07-12 06:23:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:38,532 INFO L225 Difference]: With dead ends: 102 [2022-07-12 06:23:38,532 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 06:23:38,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 108 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=277, Invalid=2375, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 06:23:38,532 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:38,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 505 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:23:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 06:23:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2022-07-12 06:23:38,538 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) [2022-07-12 06:23:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-07-12 06:23:38,539 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2022-07-12 06:23:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:38,539 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-07-12 06:23:38,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 2.361111111111111) internal successors, (85), 32 states have internal predecessors, (85), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2022-07-12 06:23:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-07-12 06:23:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 06:23:38,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:38,540 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] [2022-07-12 06:23:38,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 06:23:38,767 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 [2022-07-12 06:23:38,767 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:38,768 INFO L85 PathProgramCache]: Analyzing trace with hash 485380736, now seen corresponding path program 19 times [2022-07-12 06:23:38,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:38,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443475543] [2022-07-12 06:23:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:38,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:38,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:38,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:38,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:38,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:38,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:23:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:38,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:38,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:38,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-12 06:23:38,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:38,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443475543] [2022-07-12 06:23:38,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443475543] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:38,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056906430] [2022-07-12 06:23:38,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:23:38,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:38,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:39,000 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) [2022-07-12 06:23:39,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 06:23:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 06:23:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 06:23:42,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:45,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056906430] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:45,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:23:45,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 33 [2022-07-12 06:23:45,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543735699] [2022-07-12 06:23:45,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:45,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 06:23:45,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:45,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 06:23:45,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1588, Unknown=2, NotChecked=0, Total=1722 [2022-07-12 06:23:45,999 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) [2022-07-12 06:23:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:48,702 INFO L93 Difference]: Finished difference Result 129 states and 168 transitions. [2022-07-12 06:23:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 06:23:48,702 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 [2022-07-12 06:23:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:48,703 INFO L225 Difference]: With dead ends: 129 [2022-07-12 06:23:48,703 INFO L226 Difference]: Without dead ends: 125 [2022-07-12 06:23:48,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 85 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=303, Invalid=2665, Unknown=2, NotChecked=0, Total=2970 [2022-07-12 06:23:48,704 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:48,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 598 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 584 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-07-12 06:23:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-12 06:23:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 96. [2022-07-12 06:23:48,712 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) [2022-07-12 06:23:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2022-07-12 06:23:48,712 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 66 [2022-07-12 06:23:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:48,713 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2022-07-12 06:23:48,713 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) [2022-07-12 06:23:48,713 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2022-07-12 06:23:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 06:23:48,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:48,714 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] [2022-07-12 06:23:48,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-12 06:23:48,937 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 [2022-07-12 06:23:48,938 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:48,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:48,938 INFO L85 PathProgramCache]: Analyzing trace with hash 959666752, now seen corresponding path program 20 times [2022-07-12 06:23:48,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:48,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028759137] [2022-07-12 06:23:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:48,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:48,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:48,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:49,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:49,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:49,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:23:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:49,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:49,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:49,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-12 06:23:49,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:49,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028759137] [2022-07-12 06:23:49,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028759137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:49,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700107658] [2022-07-12 06:23:49,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:23:49,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:49,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:49,190 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) [2022-07-12 06:23:49,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 06:23:49,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:23:49,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:49,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 06:23:49,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-12 06:23:50,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:53,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700107658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:53,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:23:53,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 33 [2022-07-12 06:23:53,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492800338] [2022-07-12 06:23:53,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:53,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 06:23:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 06:23:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1505, Unknown=2, NotChecked=0, Total=1640 [2022-07-12 06:23:53,678 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) [2022-07-12 06:23:54,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:54,359 INFO L93 Difference]: Finished difference Result 143 states and 188 transitions. [2022-07-12 06:23:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 06:23:54,360 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 [2022-07-12 06:23:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:54,361 INFO L225 Difference]: With dead ends: 143 [2022-07-12 06:23:54,361 INFO L226 Difference]: Without dead ends: 139 [2022-07-12 06:23:54,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 87 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=335, Invalid=2743, Unknown=2, NotChecked=0, Total=3080 [2022-07-12 06:23:54,362 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:54,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 416 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 461 Invalid, 0 Unknown, 165 Unchecked, 0.2s Time] [2022-07-12 06:23:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-12 06:23:54,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2022-07-12 06:23:54,370 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) [2022-07-12 06:23:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2022-07-12 06:23:54,371 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 66 [2022-07-12 06:23:54,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:54,371 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2022-07-12 06:23:54,372 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) [2022-07-12 06:23:54,372 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2022-07-12 06:23:54,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 06:23:54,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:54,373 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] [2022-07-12 06:23:54,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 06:23:54,587 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 [2022-07-12 06:23:54,587 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:54,588 INFO L85 PathProgramCache]: Analyzing trace with hash 724242656, now seen corresponding path program 21 times [2022-07-12 06:23:54,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:54,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912964191] [2022-07-12 06:23:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:54,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:54,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:54,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:54,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:54,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:54,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:23:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:54,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:54,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:54,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-12 06:23:54,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:54,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912964191] [2022-07-12 06:23:54,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912964191] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:54,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649856732] [2022-07-12 06:23:54,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:23:54,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:54,803 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) [2022-07-12 06:23:54,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 06:23:55,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 06:23:55,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 06:23:55,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-12 06:23:55,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:58,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649856732] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:58,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:23:58,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2022-07-12 06:23:58,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058191356] [2022-07-12 06:23:58,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:58,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 06:23:58,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:58,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 06:23:58,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2022-07-12 06:23:58,325 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) [2022-07-12 06:23:58,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:58,755 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2022-07-12 06:23:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 06:23:58,755 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 [2022-07-12 06:23:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:58,756 INFO L225 Difference]: With dead ends: 127 [2022-07-12 06:23:58,756 INFO L226 Difference]: Without dead ends: 123 [2022-07-12 06:23:58,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=157, Invalid=1402, Unknown=1, NotChecked=0, Total=1560 [2022-07-12 06:23:58,757 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:58,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 513 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:23:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-12 06:23:58,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 103. [2022-07-12 06:23:58,771 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) [2022-07-12 06:23:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2022-07-12 06:23:58,772 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 66 [2022-07-12 06:23:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:58,772 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2022-07-12 06:23:58,772 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) [2022-07-12 06:23:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2022-07-12 06:23:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 06:23:58,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:58,774 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] [2022-07-12 06:23:58,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-12 06:23:58,990 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 [2022-07-12 06:23:58,991 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:58,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1898709812, now seen corresponding path program 7 times [2022-07-12 06:23:58,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:58,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814482044] [2022-07-12 06:23:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:58,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:23:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:23:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 06:23:59,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:59,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814482044] [2022-07-12 06:23:59,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814482044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:59,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376357406] [2022-07-12 06:23:59,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:23:59,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:59,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:59,271 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) [2022-07-12 06:23:59,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 06:23:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:59,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 06:23:59,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 06:24:00,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:02,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376357406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:02,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:24:02,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2022-07-12 06:24:02,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397183753] [2022-07-12 06:24:02,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:02,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 06:24:02,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:02,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 06:24:02,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1165, Unknown=1, NotChecked=0, Total=1260 [2022-07-12 06:24:02,817 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) [2022-07-12 06:24:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:03,481 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2022-07-12 06:24:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 06:24:03,481 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 [2022-07-12 06:24:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:03,482 INFO L225 Difference]: With dead ends: 133 [2022-07-12 06:24:03,482 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 06:24:03,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=251, Invalid=2100, Unknown=1, NotChecked=0, Total=2352 [2022-07-12 06:24:03,483 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 58 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:03,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 551 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:24:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 06:24:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 97. [2022-07-12 06:24:03,491 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) [2022-07-12 06:24:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2022-07-12 06:24:03,491 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 74 [2022-07-12 06:24:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:03,492 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2022-07-12 06:24:03,492 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) [2022-07-12 06:24:03,492 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2022-07-12 06:24:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 06:24:03,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:03,493 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] [2022-07-12 06:24:03,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 06:24:03,695 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 [2022-07-12 06:24:03,695 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash -599965996, now seen corresponding path program 22 times [2022-07-12 06:24:03,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:03,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909358955] [2022-07-12 06:24:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:03,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:03,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:24:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:03,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:03,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:03,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:03,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:03,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:24:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:03,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:03,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:03,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 06:24:03,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:03,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909358955] [2022-07-12 06:24:03,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909358955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:03,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031068286] [2022-07-12 06:24:03,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:24:03,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:03,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:03,960 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) [2022-07-12 06:24:03,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 06:24:04,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:24:04,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:24:04,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-12 06:24:04,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 06:24:04,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 06:24:06,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031068286] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:24:07,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:24:07,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 35 [2022-07-12 06:24:07,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871492897] [2022-07-12 06:24:07,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:07,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 06:24:07,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 06:24:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 06:24:07,001 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) [2022-07-12 06:24:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:07,462 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2022-07-12 06:24:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 06:24:07,463 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 [2022-07-12 06:24:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:07,463 INFO L225 Difference]: With dead ends: 131 [2022-07-12 06:24:07,464 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 06:24:07,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 24 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 06:24:07,465 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:07,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 519 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:24:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 06:24:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2022-07-12 06:24:07,472 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) [2022-07-12 06:24:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2022-07-12 06:24:07,472 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 134 transitions. Word has length 74 [2022-07-12 06:24:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:07,473 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 134 transitions. [2022-07-12 06:24:07,473 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) [2022-07-12 06:24:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 134 transitions. [2022-07-12 06:24:07,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 06:24:07,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:07,474 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] [2022-07-12 06:24:07,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-12 06:24:07,691 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 [2022-07-12 06:24:07,691 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:07,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1410533388, now seen corresponding path program 23 times [2022-07-12 06:24:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:07,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463232959] [2022-07-12 06:24:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:07,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:07,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:24:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:07,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:07,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:07,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:07,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:07,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:24:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:07,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:07,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:07,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:24:08,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:08,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463232959] [2022-07-12 06:24:08,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463232959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:08,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333766730] [2022-07-12 06:24:08,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:24:08,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:08,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:08,028 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) [2022-07-12 06:24:08,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 06:24:08,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 06:24:08,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:24:08,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 06:24:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:24:09,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:12,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333766730] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:12,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:24:12,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 40 [2022-07-12 06:24:12,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703467757] [2022-07-12 06:24:12,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:12,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 06:24:12,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 06:24:12,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1762, Unknown=1, NotChecked=0, Total=1892 [2022-07-12 06:24:12,180 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. Second operand has 40 states, 35 states have (on average 2.0) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-07-12 06:24:13,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:13,198 INFO L93 Difference]: Finished difference Result 188 states and 257 transitions. [2022-07-12 06:24:13,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 06:24:13,199 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.0) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 74 [2022-07-12 06:24:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:13,200 INFO L225 Difference]: With dead ends: 188 [2022-07-12 06:24:13,200 INFO L226 Difference]: Without dead ends: 184 [2022-07-12 06:24:13,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=441, Invalid=3718, Unknown=1, NotChecked=0, Total=4160 [2022-07-12 06:24:13,201 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:13,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 566 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 769 Invalid, 0 Unknown, 122 Unchecked, 0.3s Time] [2022-07-12 06:24:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-12 06:24:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 96. [2022-07-12 06:24:13,211 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, (39), 25 states have call predecessors, (39), 10 states have call successors, (39) [2022-07-12 06:24:13,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2022-07-12 06:24:13,211 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 74 [2022-07-12 06:24:13,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:13,212 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2022-07-12 06:24:13,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.0) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-07-12 06:24:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2022-07-12 06:24:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 06:24:13,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:13,213 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] [2022-07-12 06:24:13,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-12 06:24:13,427 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 [2022-07-12 06:24:13,427 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:13,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash -437615564, now seen corresponding path program 24 times [2022-07-12 06:24:13,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:13,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071622383] [2022-07-12 06:24:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:13,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:13,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:24:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:13,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:13,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:13,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:13,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:13,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:24:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:13,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:13,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:13,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:24:13,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:13,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071622383] [2022-07-12 06:24:13,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071622383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:13,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673744220] [2022-07-12 06:24:13,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:24:13,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:13,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:13,720 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) [2022-07-12 06:24:13,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-12 06:24:14,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 06:24:14,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:24:14,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 06:24:14,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 44 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:24:14,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 77 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 06:24:16,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673744220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:24:16,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:24:16,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 27] total 43 [2022-07-12 06:24:16,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427629442] [2022-07-12 06:24:16,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:16,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 06:24:16,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:16,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 06:24:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 06:24:16,533 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand has 43 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 35 states have internal predecessors, (97), 18 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (25), 12 states have call predecessors, (25), 18 states have call successors, (25) [2022-07-12 06:24:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:17,180 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-07-12 06:24:17,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 06:24:17,180 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 35 states have internal predecessors, (97), 18 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (25), 12 states have call predecessors, (25), 18 states have call successors, (25) Word has length 74 [2022-07-12 06:24:17,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:17,181 INFO L225 Difference]: With dead ends: 144 [2022-07-12 06:24:17,181 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 06:24:17,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 119 SyntacticMatches, 22 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=340, Invalid=2740, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 06:24:17,182 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 99 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:17,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 627 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 06:24:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 06:24:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2022-07-12 06:24:17,190 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, (42), 26 states have call predecessors, (42), 10 states have call successors, (42) [2022-07-12 06:24:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2022-07-12 06:24:17,191 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 74 [2022-07-12 06:24:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:17,191 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2022-07-12 06:24:17,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 35 states have internal predecessors, (97), 18 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (25), 12 states have call predecessors, (25), 18 states have call successors, (25) [2022-07-12 06:24:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2022-07-12 06:24:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 06:24:17,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:17,193 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] [2022-07-12 06:24:17,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-12 06:24:17,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:17,403 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:17,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1425316748, now seen corresponding path program 25 times [2022-07-12 06:24:17,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:17,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002753715] [2022-07-12 06:24:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:17,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:17,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:24:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:17,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:17,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:17,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:17,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:17,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:24:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:17,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:17,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:17,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 06:24:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:17,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002753715] [2022-07-12 06:24:17,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002753715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:17,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526442010] [2022-07-12 06:24:17,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:24:17,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:17,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:17,699 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:24:17,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-12 06:24:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 06:24:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 32 refuted. 2 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-12 06:24:22,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:25,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526442010] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:25,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:24:25,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2022-07-12 06:24:25,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416520833] [2022-07-12 06:24:25,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:25,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 06:24:25,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:25,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 06:24:25,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1363, Unknown=2, NotChecked=0, Total=1482 [2022-07-12 06:24:25,108 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 26 states have internal predecessors, (68), 11 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-12 06:24:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:29,911 INFO L93 Difference]: Finished difference Result 196 states and 264 transitions. [2022-07-12 06:24:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 06:24:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 26 states have internal predecessors, (68), 11 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) Word has length 74 [2022-07-12 06:24:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:29,913 INFO L225 Difference]: With dead ends: 196 [2022-07-12 06:24:29,913 INFO L226 Difference]: Without dead ends: 192 [2022-07-12 06:24:29,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=352, Invalid=2836, Unknown=4, NotChecked=0, Total=3192 [2022-07-12 06:24:29,914 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:29,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 500 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 565 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2022-07-12 06:24:29,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-12 06:24:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 118. [2022-07-12 06:24:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 78 states have internal predecessors, (88), 10 states have call successors, (10), 4 states have call predecessors, (10), 25 states have return successors, (56), 35 states have call predecessors, (56), 10 states have call successors, (56) [2022-07-12 06:24:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2022-07-12 06:24:29,924 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 74 [2022-07-12 06:24:29,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:29,925 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2022-07-12 06:24:29,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 26 states have internal predecessors, (68), 11 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-12 06:24:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2022-07-12 06:24:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 06:24:29,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:29,926 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] [2022-07-12 06:24:29,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-12 06:24:30,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:30,143 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2059083156, now seen corresponding path program 26 times [2022-07-12 06:24:30,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:30,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543586260] [2022-07-12 06:24:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:30,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:30,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:24:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:30,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:30,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:30,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:30,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:30,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:24:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:30,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:30,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:30,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 06:24:30,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:30,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543586260] [2022-07-12 06:24:30,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543586260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:30,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005383503] [2022-07-12 06:24:30,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:24:30,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:30,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:30,476 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:24:30,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-12 06:24:30,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:24:30,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:24:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 06:24:30,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 41 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 06:24:31,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:34,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005383503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:34,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:24:34,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2022-07-12 06:24:34,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959816495] [2022-07-12 06:24:34,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:34,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 06:24:34,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 06:24:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1525, Unknown=1, NotChecked=0, Total=1640 [2022-07-12 06:24:34,400 INFO L87 Difference]: Start difference. First operand 118 states and 154 transitions. Second operand has 38 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 28 states have internal predecessors, (67), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-12 06:24:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:35,341 INFO L93 Difference]: Finished difference Result 189 states and 255 transitions. [2022-07-12 06:24:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 06:24:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 28 states have internal predecessors, (67), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) Word has length 74 [2022-07-12 06:24:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:35,342 INFO L225 Difference]: With dead ends: 189 [2022-07-12 06:24:35,342 INFO L226 Difference]: Without dead ends: 185 [2022-07-12 06:24:35,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=333, Invalid=2972, Unknown=1, NotChecked=0, Total=3306 [2022-07-12 06:24:35,343 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 33 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:35,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 756 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 06:24:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-12 06:24:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 108. [2022-07-12 06:24:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.08) internal successors, (81), 72 states have internal predecessors, (81), 10 states have call successors, (10), 4 states have call predecessors, (10), 22 states have return successors, (49), 31 states have call predecessors, (49), 10 states have call successors, (49) [2022-07-12 06:24:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2022-07-12 06:24:35,353 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 74 [2022-07-12 06:24:35,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:35,353 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2022-07-12 06:24:35,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 28 states have internal predecessors, (67), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-07-12 06:24:35,353 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2022-07-12 06:24:35,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-12 06:24:35,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:35,356 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] [2022-07-12 06:24:35,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-12 06:24:35,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-12 06:24:35,559 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:35,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1262966316, now seen corresponding path program 27 times [2022-07-12 06:24:35,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:35,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053080735] [2022-07-12 06:24:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:35,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:35,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:24:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:35,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:35,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:35,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:35,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:35,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-12 06:24:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:35,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:35,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:35,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 06:24:35,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:35,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053080735] [2022-07-12 06:24:35,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053080735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:35,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236851474] [2022-07-12 06:24:35,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:24:35,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:35,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:35,820 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:24:35,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-12 06:24:36,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-12 06:24:36,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:24:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-12 06:24:36,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 06:24:36,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 06:24:39,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236851474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:24:39,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:24:39,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 35 [2022-07-12 06:24:39,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291253803] [2022-07-12 06:24:39,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:39,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 06:24:39,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 06:24:39,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 06:24:39,022 INFO L87 Difference]: Start difference. First operand 108 states and 140 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) [2022-07-12 06:24:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:39,536 INFO L93 Difference]: Finished difference Result 143 states and 184 transitions. [2022-07-12 06:24:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 06:24:39,536 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 [2022-07-12 06:24:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:39,537 INFO L225 Difference]: With dead ends: 143 [2022-07-12 06:24:39,537 INFO L226 Difference]: Without dead ends: 139 [2022-07-12 06:24:39,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 24 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 06:24:39,538 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 59 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:39,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 527 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:24:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-12 06:24:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 114. [2022-07-12 06:24:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 76 states have internal predecessors, (85), 10 states have call successors, (10), 4 states have call predecessors, (10), 24 states have return successors, (54), 33 states have call predecessors, (54), 10 states have call successors, (54) [2022-07-12 06:24:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 149 transitions. [2022-07-12 06:24:39,548 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 149 transitions. Word has length 74 [2022-07-12 06:24:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:39,548 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 149 transitions. [2022-07-12 06:24:39,548 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) [2022-07-12 06:24:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 149 transitions. [2022-07-12 06:24:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 06:24:39,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:39,550 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1] [2022-07-12 06:24:39,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-12 06:24:39,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-12 06:24:39,775 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:39,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 256823296, now seen corresponding path program 28 times [2022-07-12 06:24:39,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:39,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329245708] [2022-07-12 06:24:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:39,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:39,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:24:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:39,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:39,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:39,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:39,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:39,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:39,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 06:24:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:40,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:40,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:40,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-12 06:24:40,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:40,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329245708] [2022-07-12 06:24:40,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329245708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:40,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963391503] [2022-07-12 06:24:40,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:24:40,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:40,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:40,096 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:24:40,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-12 06:24:40,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:24:40,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:24:40,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-12 06:24:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-12 06:24:41,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:43,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963391503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:43,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:24:43,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2022-07-12 06:24:43,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737346841] [2022-07-12 06:24:43,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:43,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 06:24:43,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:43,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 06:24:43,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1614, Unknown=1, NotChecked=0, Total=1722 [2022-07-12 06:24:43,940 INFO L87 Difference]: Start difference. First operand 114 states and 149 transitions. Second operand has 38 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 26 states have internal predecessors, (69), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (20), 16 states have call predecessors, (20), 11 states have call successors, (20) [2022-07-12 06:24:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:45,014 INFO L93 Difference]: Finished difference Result 165 states and 216 transitions. [2022-07-12 06:24:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 06:24:45,015 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 26 states have internal predecessors, (69), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (20), 16 states have call predecessors, (20), 11 states have call successors, (20) Word has length 82 [2022-07-12 06:24:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:45,016 INFO L225 Difference]: With dead ends: 165 [2022-07-12 06:24:45,016 INFO L226 Difference]: Without dead ends: 161 [2022-07-12 06:24:45,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=326, Invalid=3455, Unknown=1, NotChecked=0, Total=3782 [2022-07-12 06:24:45,017 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:45,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 614 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 999 Invalid, 0 Unknown, 136 Unchecked, 0.4s Time] [2022-07-12 06:24:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-12 06:24:45,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 104. [2022-07-12 06:24:45,026 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, (45), 29 states have call predecessors, (45), 10 states have call successors, (45) [2022-07-12 06:24:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2022-07-12 06:24:45,026 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 82 [2022-07-12 06:24:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:45,027 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2022-07-12 06:24:45,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 26 states have internal predecessors, (69), 11 states have call successors, (13), 1 states have call predecessors, (13), 14 states have return successors, (20), 16 states have call predecessors, (20), 11 states have call successors, (20) [2022-07-12 06:24:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2022-07-12 06:24:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 06:24:45,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:45,028 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2022-07-12 06:24:45,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-12 06:24:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-12 06:24:45,247 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1271964480, now seen corresponding path program 29 times [2022-07-12 06:24:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:45,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092728484] [2022-07-12 06:24:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:45,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:24:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 06:24:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 20 proven. 63 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-12 06:24:45,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:45,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092728484] [2022-07-12 06:24:45,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092728484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:45,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555442713] [2022-07-12 06:24:45,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:24:45,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:45,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:45,610 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:24:45,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-12 06:24:46,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-12 06:24:46,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:24:46,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-12 06:24:46,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 34 proven. 45 refuted. 2 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-12 06:24:53,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:56,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555442713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:56,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:24:56,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 44 [2022-07-12 06:24:56,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750129578] [2022-07-12 06:24:56,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:56,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 06:24:56,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:56,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 06:24:56,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2112, Unknown=5, NotChecked=0, Total=2256 [2022-07-12 06:24:56,078 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 44 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 32 states have internal predecessors, (76), 13 states have call successors, (15), 1 states have call predecessors, (15), 16 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-12 06:25:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:25:05,675 INFO L93 Difference]: Finished difference Result 262 states and 369 transitions. [2022-07-12 06:25:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-12 06:25:05,676 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 32 states have internal predecessors, (76), 13 states have call successors, (15), 1 states have call predecessors, (15), 16 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) Word has length 82 [2022-07-12 06:25:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:25:05,677 INFO L225 Difference]: With dead ends: 262 [2022-07-12 06:25:05,677 INFO L226 Difference]: Without dead ends: 258 [2022-07-12 06:25:05,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=640, Invalid=5202, Unknown=10, NotChecked=0, Total=5852 [2022-07-12 06:25:05,678 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:25:05,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 838 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 863 Invalid, 0 Unknown, 214 Unchecked, 0.4s Time] [2022-07-12 06:25:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-12 06:25:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 125. [2022-07-12 06:25:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 86 states have (on average 1.069767441860465) internal successors, (92), 84 states have internal predecessors, (92), 10 states have call successors, (10), 4 states have call predecessors, (10), 28 states have return successors, (65), 36 states have call predecessors, (65), 10 states have call successors, (65) [2022-07-12 06:25:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 167 transitions. [2022-07-12 06:25:05,691 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 167 transitions. Word has length 82 [2022-07-12 06:25:05,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:25:05,692 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 167 transitions. [2022-07-12 06:25:05,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 32 states have internal predecessors, (76), 13 states have call successors, (15), 1 states have call predecessors, (15), 16 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-12 06:25:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 167 transitions. [2022-07-12 06:25:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 06:25:05,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:25:05,697 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2022-07-12 06:25:05,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-12 06:25:05,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-12 06:25:05,915 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:25:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:25:05,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1368884480, now seen corresponding path program 30 times [2022-07-12 06:25:05,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:25:05,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029389775] [2022-07-12 06:25:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:25:05,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:25:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:05,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:25:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:05,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:05,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:06,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:06,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:06,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:06,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 06:25:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:06,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:06,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:06,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 06:25:06,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:25:06,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029389775] [2022-07-12 06:25:06,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029389775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:25:06,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796931023] [2022-07-12 06:25:06,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:25:06,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:25:06,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:25:06,312 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:25:06,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-12 06:25:06,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-12 06:25:06,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:25:06,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-12 06:25:06,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:25:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 21 proven. 61 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-12 06:25:07,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:25:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 7 proven. 101 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 06:25:10,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796931023] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:25:10,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:25:10,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 32] total 56 [2022-07-12 06:25:10,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779863406] [2022-07-12 06:25:10,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:25:10,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-12 06:25:10,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:25:10,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-12 06:25:10,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2841, Unknown=0, NotChecked=0, Total=3080 [2022-07-12 06:25:10,514 INFO L87 Difference]: Start difference. First operand 125 states and 167 transitions. Second operand has 56 states, 47 states have (on average 2.297872340425532) internal successors, (108), 44 states have internal predecessors, (108), 22 states have call successors, (24), 1 states have call predecessors, (24), 13 states have return successors, (30), 16 states have call predecessors, (30), 22 states have call successors, (30) [2022-07-12 06:25:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:25:11,630 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2022-07-12 06:25:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 06:25:11,631 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 47 states have (on average 2.297872340425532) internal successors, (108), 44 states have internal predecessors, (108), 22 states have call successors, (24), 1 states have call predecessors, (24), 13 states have return successors, (30), 16 states have call predecessors, (30), 22 states have call successors, (30) Word has length 82 [2022-07-12 06:25:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:25:11,632 INFO L225 Difference]: With dead ends: 210 [2022-07-12 06:25:11,632 INFO L226 Difference]: Without dead ends: 206 [2022-07-12 06:25:11,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 129 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=530, Invalid=4440, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 06:25:11,633 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 48 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 06:25:11,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 935 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 06:25:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-12 06:25:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 137. [2022-07-12 06:25:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 94 states have (on average 1.0638297872340425) internal successors, (100), 92 states have internal predecessors, (100), 10 states have call successors, (10), 4 states have call predecessors, (10), 32 states have return successors, (77), 40 states have call predecessors, (77), 10 states have call successors, (77) [2022-07-12 06:25:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 187 transitions. [2022-07-12 06:25:11,645 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 187 transitions. Word has length 82 [2022-07-12 06:25:11,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:25:11,645 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 187 transitions. [2022-07-12 06:25:11,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 47 states have (on average 2.297872340425532) internal successors, (108), 44 states have internal predecessors, (108), 22 states have call successors, (24), 1 states have call predecessors, (24), 13 states have return successors, (30), 16 states have call predecessors, (30), 22 states have call successors, (30) [2022-07-12 06:25:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 187 transitions. [2022-07-12 06:25:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 06:25:11,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:25:11,647 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1] [2022-07-12 06:25:11,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-12 06:25:11,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:25:11,863 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:25:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:25:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1935481248, now seen corresponding path program 31 times [2022-07-12 06:25:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:25:11,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002184643] [2022-07-12 06:25:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:25:11,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:25:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:11,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:25:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:11,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:11,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:11,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:12,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:12,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:12,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 06:25:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:12,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:12,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:12,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-12 06:25:12,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:25:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002184643] [2022-07-12 06:25:12,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002184643] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:25:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395400188] [2022-07-12 06:25:12,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:25:12,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:25:12,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:25:12,225 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:25:12,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-12 06:25:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:12,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-12 06:25:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:25:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 25 proven. 52 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-12 06:25:13,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:25:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 5 proven. 107 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 06:25:16,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395400188] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:25:16,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:25:16,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 30] total 51 [2022-07-12 06:25:16,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130551860] [2022-07-12 06:25:16,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:25:16,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 06:25:16,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:25:16,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 06:25:16,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2375, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 06:25:16,846 INFO L87 Difference]: Start difference. First operand 137 states and 187 transitions. Second operand has 51 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 18 states have call successors, (20), 1 states have call predecessors, (20), 15 states have return successors, (28), 17 states have call predecessors, (28), 18 states have call successors, (28) [2022-07-12 06:25:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:25:18,109 INFO L93 Difference]: Finished difference Result 207 states and 283 transitions. [2022-07-12 06:25:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-12 06:25:18,110 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 18 states have call successors, (20), 1 states have call predecessors, (20), 15 states have return successors, (28), 17 states have call predecessors, (28), 18 states have call successors, (28) Word has length 82 [2022-07-12 06:25:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:25:18,111 INFO L225 Difference]: With dead ends: 207 [2022-07-12 06:25:18,111 INFO L226 Difference]: Without dead ends: 203 [2022-07-12 06:25:18,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 138 SyntacticMatches, 16 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=537, Invalid=4433, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 06:25:18,112 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 73 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 06:25:18,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 865 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 06:25:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-12 06:25:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 111. [2022-07-12 06:25:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 76 states have internal predecessors, (82), 10 states have call successors, (10), 4 states have call predecessors, (10), 24 states have return successors, (55), 30 states have call predecessors, (55), 10 states have call successors, (55) [2022-07-12 06:25:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2022-07-12 06:25:18,123 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 82 [2022-07-12 06:25:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:25:18,124 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2022-07-12 06:25:18,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 18 states have call successors, (20), 1 states have call predecessors, (20), 15 states have return successors, (28), 17 states have call predecessors, (28), 18 states have call successors, (28) [2022-07-12 06:25:18,124 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2022-07-12 06:25:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-12 06:25:18,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:25:18,125 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:25:18,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-12 06:25:18,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-12 06:25:18,339 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:25:18,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:25:18,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1696648564, now seen corresponding path program 32 times [2022-07-12 06:25:18,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:25:18,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729402374] [2022-07-12 06:25:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:25:18,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:25:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-12 06:25:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 06:25:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 29 proven. 80 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-12 06:25:18,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:25:18,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729402374] [2022-07-12 06:25:18,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729402374] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:25:18,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451244831] [2022-07-12 06:25:18,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:25:18,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:25:18,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:25:18,736 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:25:18,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-12 06:25:19,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:25:19,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:25:19,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-12 06:25:19,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:25:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 31 proven. 73 refuted. 5 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-12 06:25:48,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:25:52,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451244831] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:25:52,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:25:52,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2022-07-12 06:25:52,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363725002] [2022-07-12 06:25:52,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:25:52,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 06:25:52,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:25:52,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 06:25:52,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2381, Unknown=9, NotChecked=0, Total=2550 [2022-07-12 06:25:52,157 INFO L87 Difference]: Start difference. First operand 111 states and 147 transitions. Second operand has 47 states, 42 states have (on average 1.880952380952381) internal successors, (79), 33 states have internal predecessors, (79), 13 states have call successors, (15), 1 states have call predecessors, (15), 16 states have return successors, (22), 18 states have call predecessors, (22), 13 states have call successors, (22)