./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 c3fed411 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-tmp.no-commuhash-c3fed41 [2021-12-17 15:10:30,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:10:30,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:10:30,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:10:30,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:10:30,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:10:30,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:10:30,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:10:30,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:10:30,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:10:30,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:10:30,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:10:30,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:10:30,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:10:30,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:10:30,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:10:30,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:10:30,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:10:30,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:10:30,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:10:30,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:10:30,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:10:30,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:10:30,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:10:30,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:10:30,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:10:30,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:10:30,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:10:30,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:10:30,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:10:30,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:10:30,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:10:30,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:10:30,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:10:30,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:10:30,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:10:30,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:10:30,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:10:30,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:10:30,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:10:30,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:10:30,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:10:30,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:10:30,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:10:30,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:10:30,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:10:30,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:10:30,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:10:30,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:10:30,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:10:30,610 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:10:30,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:10:30,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:10:30,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:10:30,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:10:30,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:10:30,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:10:30,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:10:30,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:10:30,613 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:10:30,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:10:30,613 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:10:30,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:10:30,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:10:30,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:10:30,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:10:30,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:10:30,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:10:30,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:10:30,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:10:30,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:10:30,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:10:30,616 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:10:30,616 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:10:30,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:10:30,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:10:30,616 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 [2021-12-17 15:10:30,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:10:30,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:10:30,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:10:30,833 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:10:30,834 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:10:30,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd02.c [2021-12-17 15:10:30,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/665efc48d/c7f417272ca94eda9afaf4066b26b6a1/FLAG1d00d470d [2021-12-17 15:10:31,234 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:10:31,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c [2021-12-17 15:10:31,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/665efc48d/c7f417272ca94eda9afaf4066b26b6a1/FLAG1d00d470d [2021-12-17 15:10:31,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/665efc48d/c7f417272ca94eda9afaf4066b26b6a1 [2021-12-17 15:10:31,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:10:31,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:10:31,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:10:31,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:10:31,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:10:31,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f745ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31, skipping insertion in model container [2021-12-17 15:10:31,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:10:31,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:10:31,411 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] [2021-12-17 15:10:31,422 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] [2021-12-17 15:10:31,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:10:31,428 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:10:31,437 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] [2021-12-17 15:10:31,445 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] [2021-12-17 15:10:31,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:10:31,456 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:10:31,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31 WrapperNode [2021-12-17 15:10:31,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:10:31,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:10:31,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:10:31,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:10:31,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,477 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2021-12-17 15:10:31,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:10:31,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:10:31,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:10:31,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:10:31,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:10:31,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:10:31,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:10:31,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:10:31,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (1/1) ... [2021-12-17 15:10:31,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:10:31,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:31,529 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) [2021-12-17 15:10:31,544 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 [2021-12-17 15:10:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:10:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-12-17 15:10:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-12-17 15:10:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:10:31,560 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2021-12-17 15:10:31,560 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2021-12-17 15:10:31,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:10:31,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:10:31,604 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:10:31,605 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:10:31,716 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:10:31,720 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:10:31,720 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 15:10:31,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:10:31 BoogieIcfgContainer [2021-12-17 15:10:31,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:10:31,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:10:31,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:10:31,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:10:31,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:10:31" (1/3) ... [2021-12-17 15:10:31,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a46f725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:10:31, skipping insertion in model container [2021-12-17 15:10:31,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:10:31" (2/3) ... [2021-12-17 15:10:31,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a46f725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:10:31, skipping insertion in model container [2021-12-17 15:10:31,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:10:31" (3/3) ... [2021-12-17 15:10:31,727 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd02.c [2021-12-17 15:10:31,730 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:10:31,730 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 15:10:31,769 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:10:31,773 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 15:10:31,773 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 15:10:31,782 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) [2021-12-17 15:10:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 15:10:31,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:31,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:10:31,786 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1041004109, now seen corresponding path program 1 times [2021-12-17 15:10:31,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:31,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88621180] [2021-12-17 15:10:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:31,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:10:31,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:31,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88621180] [2021-12-17 15:10:31,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88621180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:31,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:31,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:10:31,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310107788] [2021-12-17 15:10:31,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:31,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:10:31,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:10:31,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:10:31,971 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) [2021-12-17 15:10:32,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:32,090 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-12-17 15:10:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:10:32,093 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 [2021-12-17 15:10:32,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:32,099 INFO L225 Difference]: With dead ends: 78 [2021-12-17 15:10:32,099 INFO L226 Difference]: Without dead ends: 41 [2021-12-17 15:10:32,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:10:32,107 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 36 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:32,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 154 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-17 15:10:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-17 15:10:32,144 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) [2021-12-17 15:10:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-12-17 15:10:32,149 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2021-12-17 15:10:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:32,149 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-12-17 15:10:32,150 INFO L471 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) [2021-12-17 15:10:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-12-17 15:10:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 15:10:32,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:32,151 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:10:32,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:10:32,152 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:32,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1602001293, now seen corresponding path program 1 times [2021-12-17 15:10:32,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:32,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946375454] [2021-12-17 15:10:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:32,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:10:32,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:32,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946375454] [2021-12-17 15:10:32,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946375454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:32,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:32,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:10:32,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815731299] [2021-12-17 15:10:32,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:32,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:10:32,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:32,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:10:32,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:10:32,265 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) [2021-12-17 15:10:32,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:32,354 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-12-17 15:10:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:10:32,355 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 [2021-12-17 15:10:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:32,359 INFO L225 Difference]: With dead ends: 59 [2021-12-17 15:10:32,360 INFO L226 Difference]: Without dead ends: 57 [2021-12-17 15:10:32,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:10:32,364 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 18 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:32,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 129 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:10:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-17 15:10:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-12-17 15:10:32,375 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) [2021-12-17 15:10:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-12-17 15:10:32,376 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2021-12-17 15:10:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:32,376 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-12-17 15:10:32,376 INFO L471 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) [2021-12-17 15:10:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-12-17 15:10:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 15:10:32,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:32,377 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:10:32,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:10:32,378 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:32,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1599171148, now seen corresponding path program 1 times [2021-12-17 15:10:32,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:32,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866469461] [2021-12-17 15:10:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:32,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:10:32,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:32,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866469461] [2021-12-17 15:10:32,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866469461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:32,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:32,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 15:10:32,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546614646] [2021-12-17 15:10:32,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:32,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 15:10:32,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 15:10:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:10:32,440 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) [2021-12-17 15:10:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:32,510 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-12-17 15:10:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:10:32,510 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 [2021-12-17 15:10:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:32,511 INFO L225 Difference]: With dead ends: 63 [2021-12-17 15:10:32,512 INFO L226 Difference]: Without dead ends: 61 [2021-12-17 15:10:32,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:10:32,513 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 23 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:32,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 162 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:10:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-17 15:10:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2021-12-17 15:10:32,520 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) [2021-12-17 15:10:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-17 15:10:32,520 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 14 [2021-12-17 15:10:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:32,521 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-17 15:10:32,521 INFO L471 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) [2021-12-17 15:10:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-17 15:10:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 15:10:32,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:32,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:10:32,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 15:10:32,523 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:32,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:32,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2110562560, now seen corresponding path program 1 times [2021-12-17 15:10:32,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:32,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134188248] [2021-12-17 15:10:32,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:32,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:10:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:10:32,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:32,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134188248] [2021-12-17 15:10:32,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134188248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:32,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:32,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:10:32,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946420872] [2021-12-17 15:10:32,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:32,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:10:32,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:32,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:10:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:10:32,573 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) [2021-12-17 15:10:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:32,581 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-12-17 15:10:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:10:32,581 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 [2021-12-17 15:10:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:32,582 INFO L225 Difference]: With dead ends: 55 [2021-12-17 15:10:32,582 INFO L226 Difference]: Without dead ends: 51 [2021-12-17 15:10:32,583 INFO L932 BasicCegarLoop]: 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 [2021-12-17 15:10:32,583 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:32,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:10:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-17 15:10:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-17 15:10:32,588 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) [2021-12-17 15:10:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-12-17 15:10:32,589 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2021-12-17 15:10:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:32,589 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-12-17 15:10:32,589 INFO L471 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) [2021-12-17 15:10:32,589 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-12-17 15:10:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 15:10:32,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:32,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:10:32,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 15:10:32,591 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:32,591 INFO L85 PathProgramCache]: Analyzing trace with hash -291106652, now seen corresponding path program 1 times [2021-12-17 15:10:32,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:32,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404011051] [2021-12-17 15:10:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:32,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:10:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:10:32,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404011051] [2021-12-17 15:10:32,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404011051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:32,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:32,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 15:10:32,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733232521] [2021-12-17 15:10:32,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:32,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 15:10:32,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:32,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 15:10:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:10:32,683 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) [2021-12-17 15:10:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:32,787 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2021-12-17 15:10:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 15:10:32,787 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 [2021-12-17 15:10:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:32,788 INFO L225 Difference]: With dead ends: 69 [2021-12-17 15:10:32,788 INFO L226 Difference]: Without dead ends: 65 [2021-12-17 15:10:32,788 INFO L932 BasicCegarLoop]: 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 [2021-12-17 15:10:32,789 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:32,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 106 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-17 15:10:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-12-17 15:10:32,795 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) [2021-12-17 15:10:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-12-17 15:10:32,795 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 21 [2021-12-17 15:10:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:32,795 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-12-17 15:10:32,795 INFO L471 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) [2021-12-17 15:10:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-12-17 15:10:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 15:10:32,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:32,796 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:32,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:10:32,797 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:32,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1709846180, now seen corresponding path program 1 times [2021-12-17 15:10:32,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:32,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13057884] [2021-12-17 15:10:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:32,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:10:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:10:32,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:32,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13057884] [2021-12-17 15:10:32,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13057884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:32,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:32,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:10:32,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733404240] [2021-12-17 15:10:32,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:32,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:10:32,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:10:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:10:32,857 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) [2021-12-17 15:10:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:32,865 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2021-12-17 15:10:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:10:32,866 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 [2021-12-17 15:10:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:32,867 INFO L225 Difference]: With dead ends: 64 [2021-12-17 15:10:32,867 INFO L226 Difference]: Without dead ends: 55 [2021-12-17 15:10:32,867 INFO L932 BasicCegarLoop]: 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 [2021-12-17 15:10:32,867 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:32,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:10:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-17 15:10:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-17 15:10:32,872 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) [2021-12-17 15:10:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-12-17 15:10:32,872 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-12-17 15:10:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:32,873 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-12-17 15:10:32,873 INFO L471 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) [2021-12-17 15:10:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-12-17 15:10:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 15:10:32,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:32,874 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:32,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 15:10:32,874 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1148028586, now seen corresponding path program 1 times [2021-12-17 15:10:32,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:32,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547681015] [2021-12-17 15:10:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:32,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 15:10:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 15:10:32,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:32,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547681015] [2021-12-17 15:10:32,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547681015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:32,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108574540] [2021-12-17 15:10:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:32,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:32,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:32,981 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) [2021-12-17 15:10:33,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 15:10:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 15:10:33,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 15:10:33,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 15:10:33,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108574540] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:33,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:33,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2021-12-17 15:10:33,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037094686] [2021-12-17 15:10:33,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:33,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 15:10:33,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 15:10:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-17 15:10:33,461 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) [2021-12-17 15:10:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:33,630 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-12-17 15:10:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 15:10:33,631 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 [2021-12-17 15:10:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:33,631 INFO L225 Difference]: With dead ends: 63 [2021-12-17 15:10:33,631 INFO L226 Difference]: Without dead ends: 55 [2021-12-17 15:10:33,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-12-17 15:10:33,632 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:33,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-17 15:10:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2021-12-17 15:10:33,636 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) [2021-12-17 15:10:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-12-17 15:10:33,637 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2021-12-17 15:10:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:33,637 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-12-17 15:10:33,637 INFO L471 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) [2021-12-17 15:10:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-12-17 15:10:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 15:10:33,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:33,644 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:33,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:33,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:33,845 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:33,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:33,846 INFO L85 PathProgramCache]: Analyzing trace with hash -729806600, now seen corresponding path program 1 times [2021-12-17 15:10:33,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:33,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647988477] [2021-12-17 15:10:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:33,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:10:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:10:33,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:33,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647988477] [2021-12-17 15:10:33,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647988477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:33,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311137259] [2021-12-17 15:10:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:33,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:33,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:33,979 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) [2021-12-17 15:10:33,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 15:10:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:34,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 15:10:34,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:10:34,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 15:10:34,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311137259] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:34,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:34,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2021-12-17 15:10:34,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285576988] [2021-12-17 15:10:34,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:34,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 15:10:34,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:34,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 15:10:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-12-17 15:10:34,423 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) [2021-12-17 15:10:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:34,574 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2021-12-17 15:10:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 15:10:34,575 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 [2021-12-17 15:10:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:34,575 INFO L225 Difference]: With dead ends: 74 [2021-12-17 15:10:34,576 INFO L226 Difference]: Without dead ends: 70 [2021-12-17 15:10:34,576 INFO L932 BasicCegarLoop]: 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 [2021-12-17 15:10:34,577 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:34,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 185 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-17 15:10:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-12-17 15:10:34,597 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) [2021-12-17 15:10:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-12-17 15:10:34,598 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2021-12-17 15:10:34,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:34,598 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-12-17 15:10:34,598 INFO L471 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) [2021-12-17 15:10:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-12-17 15:10:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 15:10:34,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:34,600 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:34,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:34,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-17 15:10:34,818 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:34,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1241581992, now seen corresponding path program 1 times [2021-12-17 15:10:34,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:34,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807229274] [2021-12-17 15:10:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:34,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:34,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:34,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:34,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:10:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:10:34,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:34,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807229274] [2021-12-17 15:10:34,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807229274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:10:34,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:10:34,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 15:10:34,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294031330] [2021-12-17 15:10:34,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:10:34,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 15:10:34,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 15:10:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:10:34,918 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) [2021-12-17 15:10:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:35,017 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2021-12-17 15:10:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:10:35,018 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 [2021-12-17 15:10:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:35,019 INFO L225 Difference]: With dead ends: 80 [2021-12-17 15:10:35,019 INFO L226 Difference]: Without dead ends: 76 [2021-12-17 15:10:35,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-17 15:10:35,020 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:35,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 122 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:35,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-17 15:10:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-12-17 15:10:35,035 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) [2021-12-17 15:10:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2021-12-17 15:10:35,036 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 29 [2021-12-17 15:10:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:35,037 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2021-12-17 15:10:35,037 INFO L471 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) [2021-12-17 15:10:35,037 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2021-12-17 15:10:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 15:10:35,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:35,038 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:35,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 15:10:35,038 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:35,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:35,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2029271682, now seen corresponding path program 1 times [2021-12-17 15:10:35,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:35,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681970644] [2021-12-17 15:10:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:35,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:35,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:35,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:35,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:10:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:35,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:10:35,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:35,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681970644] [2021-12-17 15:10:35,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681970644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:35,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49462278] [2021-12-17 15:10:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:35,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:35,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:35,180 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) [2021-12-17 15:10:35,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 15:10:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:35,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 15:10:35,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:10:35,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:10:35,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49462278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:35,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:35,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 20 [2021-12-17 15:10:35,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616580809] [2021-12-17 15:10:35,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:35,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 15:10:35,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:35,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 15:10:35,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-12-17 15:10:35,867 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) [2021-12-17 15:10:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:36,042 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2021-12-17 15:10:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 15:10:36,042 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 [2021-12-17 15:10:36,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:36,043 INFO L225 Difference]: With dead ends: 89 [2021-12-17 15:10:36,043 INFO L226 Difference]: Without dead ends: 85 [2021-12-17 15:10:36,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 12 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-12-17 15:10:36,044 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:36,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 211 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-17 15:10:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2021-12-17 15:10:36,050 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) [2021-12-17 15:10:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2021-12-17 15:10:36,057 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 36 [2021-12-17 15:10:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:36,057 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2021-12-17 15:10:36,057 INFO L471 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) [2021-12-17 15:10:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2021-12-17 15:10:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 15:10:36,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:36,058 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:36,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 15:10:36,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:36,276 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash -122584798, now seen corresponding path program 1 times [2021-12-17 15:10:36,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:36,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418876092] [2021-12-17 15:10:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:36,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:10:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:10:36,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:36,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418876092] [2021-12-17 15:10:36,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418876092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267733125] [2021-12-17 15:10:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:36,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:36,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:36,433 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) [2021-12-17 15:10:36,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 15:10:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 15:10:36,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:10:36,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:10:36,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267733125] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:36,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:36,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 15 [2021-12-17 15:10:36,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472432601] [2021-12-17 15:10:36,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:36,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 15:10:36,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:36,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 15:10:36,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-17 15:10:36,838 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) [2021-12-17 15:10:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:36,970 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-12-17 15:10:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 15:10:36,971 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 [2021-12-17 15:10:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:36,971 INFO L225 Difference]: With dead ends: 84 [2021-12-17 15:10:36,971 INFO L226 Difference]: Without dead ends: 75 [2021-12-17 15:10:36,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-12-17 15:10:36,972 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:36,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 128 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-17 15:10:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-12-17 15:10:36,977 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) [2021-12-17 15:10:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-12-17 15:10:36,978 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 36 [2021-12-17 15:10:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:36,978 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-12-17 15:10:36,978 INFO L471 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) [2021-12-17 15:10:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-12-17 15:10:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 15:10:36,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:36,979 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:36,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:37,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:37,198 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1326914756, now seen corresponding path program 1 times [2021-12-17 15:10:37,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:37,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842454264] [2021-12-17 15:10:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:37,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:37,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:37,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:37,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:37,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 15:10:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 15:10:37,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:37,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842454264] [2021-12-17 15:10:37,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842454264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:37,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573855861] [2021-12-17 15:10:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:37,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:37,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:37,376 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) [2021-12-17 15:10:37,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 15:10:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:37,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 15:10:37,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:10:37,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:10:38,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573855861] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:38,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:38,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 37 [2021-12-17 15:10:38,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226426616] [2021-12-17 15:10:38,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:38,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-17 15:10:38,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:38,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-17 15:10:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 15:10:38,129 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 37 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-12-17 15:10:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:38,635 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2021-12-17 15:10:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 15:10:38,636 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 37 [2021-12-17 15:10:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:38,636 INFO L225 Difference]: With dead ends: 121 [2021-12-17 15:10:38,636 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 15:10:38,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 15:10:38,637 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 69 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:38,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 391 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:10:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 15:10:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2021-12-17 15:10:38,644 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) [2021-12-17 15:10:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2021-12-17 15:10:38,645 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 37 [2021-12-17 15:10:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:38,645 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2021-12-17 15:10:38,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-12-17 15:10:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2021-12-17 15:10:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 15:10:38,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:38,646 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:38,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:38,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 15:10:38,865 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash -238590844, now seen corresponding path program 2 times [2021-12-17 15:10:38,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:38,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970563385] [2021-12-17 15:10:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:38,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:38,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:38,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:38,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:38,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 15:10:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:10:38,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970563385] [2021-12-17 15:10:38,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970563385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608431276] [2021-12-17 15:10:38,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:10:38,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:38,968 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) [2021-12-17 15:10:38,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 15:10:39,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:10:39,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:39,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 15:10:39,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:10:39,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:10:39,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608431276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:39,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:39,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 21 [2021-12-17 15:10:39,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707753270] [2021-12-17 15:10:39,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:39,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 15:10:39,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 15:10:39,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-12-17 15:10:39,550 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-17 15:10:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:39,751 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2021-12-17 15:10:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 15:10:39,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) Word has length 37 [2021-12-17 15:10:39,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:39,752 INFO L225 Difference]: With dead ends: 88 [2021-12-17 15:10:39,752 INFO L226 Difference]: Without dead ends: 84 [2021-12-17 15:10:39,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-12-17 15:10:39,753 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:39,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 181 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:39,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-17 15:10:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-12-17 15:10:39,775 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) [2021-12-17 15:10:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-12-17 15:10:39,775 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2021-12-17 15:10:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:39,776 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-12-17 15:10:39,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 6 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-17 15:10:39,776 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-12-17 15:10:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 15:10:39,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:39,777 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:39,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:39,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:39,994 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:39,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:39,994 INFO L85 PathProgramCache]: Analyzing trace with hash 861262790, now seen corresponding path program 2 times [2021-12-17 15:10:39,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:39,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836716878] [2021-12-17 15:10:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:39,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 15:10:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:10:40,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:40,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836716878] [2021-12-17 15:10:40,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836716878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:40,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140610513] [2021-12-17 15:10:40,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:10:40,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:40,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:40,192 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) [2021-12-17 15:10:40,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 15:10:40,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:10:40,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:40,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 15:10:40,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:10:40,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:10:41,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140610513] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:41,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:41,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2021-12-17 15:10:41,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649863643] [2021-12-17 15:10:41,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:41,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 15:10:41,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:41,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 15:10:41,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-12-17 15:10:41,500 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) [2021-12-17 15:10:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:41,921 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2021-12-17 15:10:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:10:41,921 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 [2021-12-17 15:10:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:41,922 INFO L225 Difference]: With dead ends: 94 [2021-12-17 15:10:41,922 INFO L226 Difference]: Without dead ends: 90 [2021-12-17 15:10:41,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 15:10:41,923 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:41,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 430 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:10:41,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-17 15:10:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2021-12-17 15:10:41,928 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) [2021-12-17 15:10:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2021-12-17 15:10:41,928 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 51 [2021-12-17 15:10:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:41,929 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2021-12-17 15:10:41,929 INFO L471 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) [2021-12-17 15:10:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2021-12-17 15:10:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 15:10:41,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:41,930 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:41,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:42,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:42,136 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash -124726374, now seen corresponding path program 3 times [2021-12-17 15:10:42,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:42,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081134410] [2021-12-17 15:10:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:42,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:42,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:42,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:42,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 15:10:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:42,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:42,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:10:42,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:42,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081134410] [2021-12-17 15:10:42,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081134410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:42,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917055278] [2021-12-17 15:10:42,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:10:42,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:42,340 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) [2021-12-17 15:10:42,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 15:10:42,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 15:10:42,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:42,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 15:10:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:10:42,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:10:43,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917055278] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:43,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:43,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 31 [2021-12-17 15:10:43,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391532022] [2021-12-17 15:10:43,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:43,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 15:10:43,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 15:10:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-12-17 15:10:43,356 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) [2021-12-17 15:10:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:43,645 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-12-17 15:10:43,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 15:10:43,646 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 [2021-12-17 15:10:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:43,648 INFO L225 Difference]: With dead ends: 84 [2021-12-17 15:10:43,648 INFO L226 Difference]: Without dead ends: 75 [2021-12-17 15:10:43,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 15:10:43,654 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:43,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 284 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-17 15:10:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-12-17 15:10:43,660 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) [2021-12-17 15:10:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2021-12-17 15:10:43,663 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 43 [2021-12-17 15:10:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:43,664 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2021-12-17 15:10:43,664 INFO L471 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) [2021-12-17 15:10:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2021-12-17 15:10:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 15:10:43,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:43,666 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:43,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:43,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 15:10:43,872 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:43,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1270773450, now seen corresponding path program 1 times [2021-12-17 15:10:43,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:43,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831281749] [2021-12-17 15:10:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:43,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:43,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:43,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:43,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:43,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 15:10:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:43,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 15:10:44,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831281749] [2021-12-17 15:10:44,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831281749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950386501] [2021-12-17 15:10:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:44,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:44,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:44,022 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) [2021-12-17 15:10:44,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 15:10:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 15:10:44,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 15:10:44,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:10:45,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950386501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:45,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:45,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 36 [2021-12-17 15:10:45,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303129570] [2021-12-17 15:10:45,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:45,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 15:10:45,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:45,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 15:10:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 15:10:45,159 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 36 states, 31 states have (on average 2.129032258064516) internal successors, (66), 29 states have internal predecessors, (66), 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) [2021-12-17 15:10:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:45,736 INFO L93 Difference]: Finished difference Result 112 states and 148 transitions. [2021-12-17 15:10:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 15:10:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 2.129032258064516) internal successors, (66), 29 states have internal predecessors, (66), 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 [2021-12-17 15:10:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:45,737 INFO L225 Difference]: With dead ends: 112 [2021-12-17 15:10:45,737 INFO L226 Difference]: Without dead ends: 108 [2021-12-17 15:10:45,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 15:10:45,738 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 65 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:45,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 461 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:10:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-17 15:10:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-12-17 15:10:45,743 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) [2021-12-17 15:10:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-12-17 15:10:45,744 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 44 [2021-12-17 15:10:45,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:45,744 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-12-17 15:10:45,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 2.129032258064516) internal successors, (66), 29 states have internal predecessors, (66), 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) [2021-12-17 15:10:45,744 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-12-17 15:10:45,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 15:10:45,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:45,745 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:45,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:45,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 15:10:45,955 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:45,956 INFO L85 PathProgramCache]: Analyzing trace with hash 132450678, now seen corresponding path program 2 times [2021-12-17 15:10:45,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:45,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778627284] [2021-12-17 15:10:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:45,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:45,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:46,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:46,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:46,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 15:10:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:46,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 15:10:46,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:46,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778627284] [2021-12-17 15:10:46,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778627284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:46,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377406119] [2021-12-17 15:10:46,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:10:46,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:46,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:46,104 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) [2021-12-17 15:10:46,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 15:10:46,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:10:46,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:46,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 15:10:46,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 15:10:46,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:10:46,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377406119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:46,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:46,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 21 [2021-12-17 15:10:46,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463705917] [2021-12-17 15:10:46,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:46,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 15:10:46,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 15:10:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-12-17 15:10:46,988 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) [2021-12-17 15:10:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:47,179 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2021-12-17 15:10:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 15:10:47,179 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 [2021-12-17 15:10:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:47,180 INFO L225 Difference]: With dead ends: 109 [2021-12-17 15:10:47,180 INFO L226 Difference]: Without dead ends: 105 [2021-12-17 15:10:47,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 16 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-12-17 15:10:47,181 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:47,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 253 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:10:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-17 15:10:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2021-12-17 15:10:47,185 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) [2021-12-17 15:10:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2021-12-17 15:10:47,186 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 44 [2021-12-17 15:10:47,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:47,186 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2021-12-17 15:10:47,186 INFO L471 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) [2021-12-17 15:10:47,186 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2021-12-17 15:10:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 15:10:47,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:47,187 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:47,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-17 15:10:47,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 15:10:47,387 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash 815065250, now seen corresponding path program 3 times [2021-12-17 15:10:47,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:47,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833517739] [2021-12-17 15:10:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:47,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:47,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:47,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:47,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:47,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:47,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:10:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:47,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:10:47,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:47,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833517739] [2021-12-17 15:10:47,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833517739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:47,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579361591] [2021-12-17 15:10:47,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:10:47,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:47,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:47,578 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) [2021-12-17 15:10:47,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 15:10:47,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 15:10:47,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:47,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 15:10:47,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 15:10:48,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:52,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579361591] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:52,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:10:52,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-12-17 15:10:52,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806669503] [2021-12-17 15:10:52,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:52,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 15:10:52,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:52,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 15:10:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1359, Unknown=1, NotChecked=0, Total=1482 [2021-12-17 15:10:52,941 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand has 28 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 20 states have internal predecessors, (57), 10 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 15:10:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:53,424 INFO L93 Difference]: Finished difference Result 134 states and 177 transitions. [2021-12-17 15:10:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 15:10:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 20 states have internal predecessors, (57), 10 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 52 [2021-12-17 15:10:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:53,426 INFO L225 Difference]: With dead ends: 134 [2021-12-17 15:10:53,426 INFO L226 Difference]: Without dead ends: 130 [2021-12-17 15:10:53,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=245, Invalid=2106, Unknown=1, NotChecked=0, Total=2352 [2021-12-17 15:10:53,428 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:53,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 354 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:10:53,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-17 15:10:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 97. [2021-12-17 15:10:53,432 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) [2021-12-17 15:10:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2021-12-17 15:10:53,433 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 128 transitions. Word has length 52 [2021-12-17 15:10:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:53,440 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 128 transitions. [2021-12-17 15:10:53,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 20 states have internal predecessors, (57), 10 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 15:10:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 128 transitions. [2021-12-17 15:10:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 15:10:53,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:53,442 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:53,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:53,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 15:10:53,652 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:53,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash 850048834, now seen corresponding path program 4 times [2021-12-17 15:10:53,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:53,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948970394] [2021-12-17 15:10:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:53,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:53,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:53,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:53,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:53,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:53,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:10:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:53,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:10:53,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:53,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948970394] [2021-12-17 15:10:53,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948970394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:53,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332743352] [2021-12-17 15:10:53,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:10:53,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:53,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:53,904 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) [2021-12-17 15:10:53,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 15:10:54,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:10:54,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:54,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 15:10:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 15:10:54,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 15:10:55,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332743352] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:55,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:55,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 21] total 39 [2021-12-17 15:10:55,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413887040] [2021-12-17 15:10:55,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:55,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 15:10:55,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:55,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 15:10:55,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 15:10:55,389 INFO L87 Difference]: Start difference. First operand 97 states and 128 transitions. Second operand has 39 states, 34 states have (on average 2.176470588235294) internal successors, (74), 30 states have internal predecessors, (74), 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) [2021-12-17 15:10:56,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:56,075 INFO L93 Difference]: Finished difference Result 135 states and 183 transitions. [2021-12-17 15:10:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 15:10:56,075 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 34 states have (on average 2.176470588235294) internal successors, (74), 30 states have internal predecessors, (74), 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 [2021-12-17 15:10:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:56,077 INFO L225 Difference]: With dead ends: 135 [2021-12-17 15:10:56,090 INFO L226 Difference]: Without dead ends: 131 [2021-12-17 15:10:56,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 15:10:56,092 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:56,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 426 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:10:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-17 15:10:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 70. [2021-12-17 15:10:56,097 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) [2021-12-17 15:10:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-12-17 15:10:56,097 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 52 [2021-12-17 15:10:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:56,098 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-12-17 15:10:56,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 34 states have (on average 2.176470588235294) internal successors, (74), 30 states have internal predecessors, (74), 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) [2021-12-17 15:10:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-12-17 15:10:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 15:10:56,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:56,099 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:56,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:56,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:56,299 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:56,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2103225754, now seen corresponding path program 5 times [2021-12-17 15:10:56,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:56,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283586538] [2021-12-17 15:10:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:56,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:56,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:56,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:56,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:56,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 15:10:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:56,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:56,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:10:56,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283586538] [2021-12-17 15:10:56,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283586538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131563340] [2021-12-17 15:10:56,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:10:56,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:56,464 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) [2021-12-17 15:10:56,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 15:10:56,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-17 15:10:56,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:56,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 15:10:56,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:10:56,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:10:57,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131563340] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:57,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:57,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2021-12-17 15:10:57,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563531674] [2021-12-17 15:10:57,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:57,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 15:10:57,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 15:10:57,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-12-17 15:10:57,548 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) [2021-12-17 15:10:57,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:57,804 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2021-12-17 15:10:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:10:57,805 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 [2021-12-17 15:10:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:57,805 INFO L225 Difference]: With dead ends: 97 [2021-12-17 15:10:57,805 INFO L226 Difference]: Without dead ends: 93 [2021-12-17 15:10:57,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 82 SyntacticMatches, 17 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 15:10:57,806 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 40 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:57,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 439 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:10:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-17 15:10:57,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2021-12-17 15:10:57,811 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) [2021-12-17 15:10:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2021-12-17 15:10:57,811 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 51 [2021-12-17 15:10:57,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:57,812 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2021-12-17 15:10:57,812 INFO L471 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) [2021-12-17 15:10:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2021-12-17 15:10:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 15:10:57,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:57,813 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:57,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:58,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-17 15:10:58,023 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash -262469082, now seen corresponding path program 6 times [2021-12-17 15:10:58,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:58,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463405030] [2021-12-17 15:10:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:58,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:58,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:58,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:58,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:58,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 15:10:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:58,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:58,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:10:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:10:58,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:10:58,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463405030] [2021-12-17 15:10:58,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463405030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:10:58,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521563277] [2021-12-17 15:10:58,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:10:58,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:58,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:10:58,232 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) [2021-12-17 15:10:58,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 15:10:58,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-17 15:10:58,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:10:58,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 15:10:58,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:10:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:10:58,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:10:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 15:10:59,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521563277] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:10:59,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:10:59,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 33 [2021-12-17 15:10:59,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680311152] [2021-12-17 15:10:59,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:10:59,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 15:10:59,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:10:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 15:10:59,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 15:10:59,395 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) [2021-12-17 15:10:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:10:59,721 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-12-17 15:10:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:10:59,721 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 [2021-12-17 15:10:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:10:59,722 INFO L225 Difference]: With dead ends: 91 [2021-12-17 15:10:59,722 INFO L226 Difference]: Without dead ends: 82 [2021-12-17 15:10:59,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 15:10:59,723 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:10:59,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 343 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:10:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-17 15:10:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2021-12-17 15:10:59,726 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) [2021-12-17 15:10:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-12-17 15:10:59,727 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 51 [2021-12-17 15:10:59,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:10:59,727 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-12-17 15:10:59,727 INFO L471 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) [2021-12-17 15:10:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-12-17 15:10:59,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 15:10:59,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:10:59,728 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:10:59,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 15:10:59,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:10:59,936 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:10:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:10:59,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1972765050, now seen corresponding path program 7 times [2021-12-17 15:10:59,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:10:59,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507787624] [2021-12-17 15:10:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:10:59,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:10:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:59,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:10:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:59,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:10:59,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:10:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:11:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 15:11:00,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:00,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507787624] [2021-12-17 15:11:00,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507787624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:00,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380422629] [2021-12-17 15:11:00,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:11:00,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:00,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:00,116 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) [2021-12-17 15:11:00,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 15:11:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:00,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 15:11:00,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 15:11:00,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 15:11:01,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380422629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:11:01,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:11:01,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2021-12-17 15:11:01,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728900708] [2021-12-17 15:11:01,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:01,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 15:11:01,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 15:11:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-12-17 15:11:01,593 INFO L87 Difference]: Start difference. First operand 74 states and 91 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) [2021-12-17 15:11:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:01,878 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-12-17 15:11:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:11:01,878 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 [2021-12-17 15:11:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:01,879 INFO L225 Difference]: With dead ends: 104 [2021-12-17 15:11:01,879 INFO L226 Difference]: Without dead ends: 100 [2021-12-17 15:11:01,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 22 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 15:11:01,881 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:01,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 437 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:11:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-17 15:11:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-12-17 15:11:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 14 states have return successors, (30), 20 states have call predecessors, (30), 10 states have call successors, (30) [2021-12-17 15:11:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2021-12-17 15:11:01,889 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 59 [2021-12-17 15:11:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:01,889 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2021-12-17 15:11:01,889 INFO L471 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) [2021-12-17 15:11:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2021-12-17 15:11:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 15:11:01,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:01,890 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:11:01,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 15:11:02,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:02,103 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash 334535194, now seen corresponding path program 4 times [2021-12-17 15:11:02,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:02,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543095666] [2021-12-17 15:11:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:02,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:02,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:11:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:02,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:02,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:02,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:11:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:02,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:02,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 15:11:02,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:02,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543095666] [2021-12-17 15:11:02,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543095666] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:02,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798957863] [2021-12-17 15:11:02,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:11:02,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:02,296 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) [2021-12-17 15:11:02,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 15:11:02,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:11:02,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:11:02,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 15:11:02,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 15:11:02,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:07,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798957863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:07,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:11:07,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-12-17 15:11:07,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343442868] [2021-12-17 15:11:07,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:07,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 15:11:07,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:07,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 15:11:07,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1435, Unknown=5, NotChecked=0, Total=1560 [2021-12-17 15:11:07,200 INFO L87 Difference]: Start difference. First operand 81 states and 102 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) [2021-12-17 15:11:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:07,632 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2021-12-17 15:11:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 15:11:07,633 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 [2021-12-17 15:11:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:07,634 INFO L225 Difference]: With dead ends: 110 [2021-12-17 15:11:07,634 INFO L226 Difference]: Without dead ends: 106 [2021-12-17 15:11:07,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=239, Invalid=2206, Unknown=5, NotChecked=0, Total=2450 [2021-12-17 15:11:07,638 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:07,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 481 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:11:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-17 15:11:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-12-17 15:11:07,642 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) [2021-12-17 15:11:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2021-12-17 15:11:07,643 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2021-12-17 15:11:07,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:07,643 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2021-12-17 15:11:07,644 INFO L471 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) [2021-12-17 15:11:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2021-12-17 15:11:07,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 15:11:07,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:07,644 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:11:07,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-17 15:11:07,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-17 15:11:07,861 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash 12091098, now seen corresponding path program 8 times [2021-12-17 15:11:07,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:07,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950287310] [2021-12-17 15:11:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:07,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:11:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:11:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:07,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:08,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 15:11:08,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:08,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950287310] [2021-12-17 15:11:08,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950287310] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:08,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313618750] [2021-12-17 15:11:08,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:11:08,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:08,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:08,029 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) [2021-12-17 15:11:08,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 15:11:08,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:11:08,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:11:08,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-17 15:11:08,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 15:11:08,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 15:11:09,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313618750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:11:09,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:11:09,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2021-12-17 15:11:09,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846730845] [2021-12-17 15:11:09,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:09,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 15:11:09,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 15:11:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-12-17 15:11:09,613 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) [2021-12-17 15:11:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:09,952 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2021-12-17 15:11:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:11:09,953 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 [2021-12-17 15:11:09,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:09,954 INFO L225 Difference]: With dead ends: 113 [2021-12-17 15:11:09,954 INFO L226 Difference]: Without dead ends: 109 [2021-12-17 15:11:09,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 22 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 15:11:09,954 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:09,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 441 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:11:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-17 15:11:09,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2021-12-17 15:11:09,958 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) [2021-12-17 15:11:09,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2021-12-17 15:11:09,958 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2021-12-17 15:11:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:09,961 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2021-12-17 15:11:09,961 INFO L471 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) [2021-12-17 15:11:09,962 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2021-12-17 15:11:09,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 15:11:09,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:09,962 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:11:09,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 15:11:10,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:10,171 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:10,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:10,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1626138758, now seen corresponding path program 9 times [2021-12-17 15:11:10,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:10,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313186559] [2021-12-17 15:11:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:10,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:10,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:11:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:10,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:10,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:10,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:10,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:11:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:10,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:10,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 15:11:10,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313186559] [2021-12-17 15:11:10,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313186559] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212069059] [2021-12-17 15:11:10,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:11:10,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:10,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:10,454 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) [2021-12-17 15:11:10,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 15:11:10,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 15:11:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:11:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 15:11:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 15:11:13,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:11:14,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212069059] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:14,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:11:14,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 34 [2021-12-17 15:11:14,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567572950] [2021-12-17 15:11:14,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:11:14,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 15:11:14,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:11:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 15:11:14,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1445, Unknown=1, NotChecked=0, Total=1560 [2021-12-17 15:11:14,120 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) [2021-12-17 15:11:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:11:16,801 INFO L93 Difference]: Finished difference Result 157 states and 208 transitions. [2021-12-17 15:11:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 15:11:16,802 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 [2021-12-17 15:11:16,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:11:16,803 INFO L225 Difference]: With dead ends: 157 [2021-12-17 15:11:16,803 INFO L226 Difference]: Without dead ends: 153 [2021-12-17 15:11:16,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=269, Invalid=2592, Unknown=1, NotChecked=0, Total=2862 [2021-12-17 15:11:16,804 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:11:16,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 577 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 793 Invalid, 0 Unknown, 232 Unchecked, 0.3s Time] [2021-12-17 15:11:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-17 15:11:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-12-17 15:11:16,809 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) [2021-12-17 15:11:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2021-12-17 15:11:16,810 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 59 [2021-12-17 15:11:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:11:16,810 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2021-12-17 15:11:16,810 INFO L471 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) [2021-12-17 15:11:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2021-12-17 15:11:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 15:11:16,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:11:16,811 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:11:16,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 15:11:17,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:17,027 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:11:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:11:17,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1786558534, now seen corresponding path program 10 times [2021-12-17 15:11:17,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:11:17,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038241332] [2021-12-17 15:11:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:11:17,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:11:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:17,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:11:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:17,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:17,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:17,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:11:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:17,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:11:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:17,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:17,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:11:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:11:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 15:11:17,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:11:17,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038241332] [2021-12-17 15:11:17,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038241332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:11:17,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785537242] [2021-12-17 15:11:17,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:11:17,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:11:17,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:11:17,272 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) [2021-12-17 15:11:17,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 15:11:17,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:11:17,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:11:17,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 15:11:17,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:11:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 15:11:17,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:03,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785537242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:03,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:15:03,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2021-12-17 15:15:03,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323299705] [2021-12-17 15:15:03,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:03,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 15:15:03,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 15:15:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2094, Unknown=2, NotChecked=0, Total=2256 [2021-12-17 15:15:03,137 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 34 states, 30 states have (on average 2.033333333333333) internal successors, (61), 26 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) [2021-12-17 15:15:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:04,007 INFO L93 Difference]: Finished difference Result 157 states and 212 transitions. [2021-12-17 15:15:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 15:15:04,008 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.033333333333333) internal successors, (61), 26 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 [2021-12-17 15:15:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:04,009 INFO L225 Difference]: With dead ends: 157 [2021-12-17 15:15:04,009 INFO L226 Difference]: Without dead ends: 153 [2021-12-17 15:15:04,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=340, Invalid=3198, Unknown=2, NotChecked=0, Total=3540 [2021-12-17 15:15:04,010 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:04,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 561 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:15:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-17 15:15:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 109. [2021-12-17 15:15:04,016 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) [2021-12-17 15:15:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 145 transitions. [2021-12-17 15:15:04,017 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 145 transitions. Word has length 59 [2021-12-17 15:15:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:04,017 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 145 transitions. [2021-12-17 15:15:04,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.033333333333333) internal successors, (61), 26 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) [2021-12-17 15:15:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 145 transitions. [2021-12-17 15:15:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 15:15:04,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:04,019 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:15:04,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:04,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:04,235 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash 547734810, now seen corresponding path program 11 times [2021-12-17 15:15:04,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:04,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442877811] [2021-12-17 15:15:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:04,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:15:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:15:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 15:15:04,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:04,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442877811] [2021-12-17 15:15:04,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442877811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:04,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800860272] [2021-12-17 15:15:04,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:15:04,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:04,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:04,456 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) [2021-12-17 15:15:04,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 15:15:04,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 15:15:04,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:15:04,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 15:15:04,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 15:15:05,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:15:06,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800860272] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:15:06,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:15:06,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 23] total 42 [2021-12-17 15:15:06,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91977213] [2021-12-17 15:15:06,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:06,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-17 15:15:06,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:06,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-17 15:15:06,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1579, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 15:15:06,263 INFO L87 Difference]: Start difference. First operand 109 states and 145 transitions. Second operand has 42 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 33 states have internal predecessors, (82), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (18), 12 states have call predecessors, (18), 15 states have call successors, (18) [2021-12-17 15:15:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:07,027 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2021-12-17 15:15:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 15:15:07,028 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 33 states have internal predecessors, (82), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (18), 12 states have call predecessors, (18), 15 states have call successors, (18) Word has length 59 [2021-12-17 15:15:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:07,029 INFO L225 Difference]: With dead ends: 201 [2021-12-17 15:15:07,029 INFO L226 Difference]: Without dead ends: 197 [2021-12-17 15:15:07,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 95 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=398, Invalid=2908, Unknown=0, NotChecked=0, Total=3306 [2021-12-17 15:15:07,030 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 36 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:07,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 658 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:15:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-17 15:15:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 124. [2021-12-17 15:15:07,037 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) [2021-12-17 15:15:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2021-12-17 15:15:07,038 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 59 [2021-12-17 15:15:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:07,038 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2021-12-17 15:15:07,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 33 states have internal predecessors, (82), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (18), 12 states have call predecessors, (18), 15 states have call successors, (18) [2021-12-17 15:15:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2021-12-17 15:15:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 15:15:07,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:07,040 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:15:07,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:07,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 15:15:07,259 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash 789094822, now seen corresponding path program 12 times [2021-12-17 15:15:07,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:07,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250015838] [2021-12-17 15:15:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:07,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:07,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:15:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:07,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:07,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:07,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:07,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:07,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 15:15:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:07,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:07,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 15:15:07,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:07,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250015838] [2021-12-17 15:15:07,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250015838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:07,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048112840] [2021-12-17 15:15:07,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:15:07,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:07,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:07,483 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) [2021-12-17 15:15:07,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 15:15:07,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 15:15:07,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:15:07,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 15:15:07,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 15:15:08,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:12,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048112840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:12,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:15:12,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-12-17 15:15:12,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869697878] [2021-12-17 15:15:12,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:12,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 15:15:12,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:12,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 15:15:12,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1433, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 15:15:12,806 INFO L87 Difference]: Start difference. First operand 124 states and 170 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 21 states have internal predecessors, (61), 10 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-17 15:15:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:13,506 INFO L93 Difference]: Finished difference Result 169 states and 229 transitions. [2021-12-17 15:15:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 15:15:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 21 states have internal predecessors, (61), 10 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) Word has length 67 [2021-12-17 15:15:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:13,507 INFO L225 Difference]: With dead ends: 169 [2021-12-17 15:15:13,507 INFO L226 Difference]: Without dead ends: 165 [2021-12-17 15:15:13,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 85 SyntacticMatches, 17 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=325, Invalid=2431, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 15:15:13,508 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:13,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 474 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:15:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-17 15:15:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2021-12-17 15:15:13,516 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) [2021-12-17 15:15:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 182 transitions. [2021-12-17 15:15:13,517 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 182 transitions. Word has length 67 [2021-12-17 15:15:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:13,518 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 182 transitions. [2021-12-17 15:15:13,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 21 states have internal predecessors, (61), 10 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-17 15:15:13,518 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 182 transitions. [2021-12-17 15:15:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 15:15:13,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:13,519 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:15:13,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:13,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 15:15:13,734 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:13,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1906616390, now seen corresponding path program 13 times [2021-12-17 15:15:13,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:13,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912514067] [2021-12-17 15:15:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:13,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:13,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:15:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:13,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:13,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:13,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:13,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:13,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 15:15:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:13,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:14,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 15:15:14,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:14,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912514067] [2021-12-17 15:15:14,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912514067] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:14,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565317958] [2021-12-17 15:15:14,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:15:14,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:14,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:14,036 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) [2021-12-17 15:15:14,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 15:15:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 15:15:14,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-17 15:15:14,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:15:16,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565317958] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:15:16,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:15:16,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 26] total 46 [2021-12-17 15:15:16,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490083493] [2021-12-17 15:15:16,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:16,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-17 15:15:16,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:16,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-17 15:15:16,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1912, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 15:15:16,988 INFO L87 Difference]: Start difference. First operand 132 states and 182 transitions. Second operand has 46 states, 40 states have (on average 2.25) internal successors, (90), 36 states have internal predecessors, (90), 17 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (23), 13 states have call predecessors, (23), 17 states have call successors, (23) [2021-12-17 15:15:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:17,937 INFO L93 Difference]: Finished difference Result 189 states and 261 transitions. [2021-12-17 15:15:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 15:15:17,938 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 2.25) internal successors, (90), 36 states have internal predecessors, (90), 17 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (23), 13 states have call predecessors, (23), 17 states have call successors, (23) Word has length 67 [2021-12-17 15:15:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:17,939 INFO L225 Difference]: With dead ends: 189 [2021-12-17 15:15:17,939 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 15:15:17,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 107 SyntacticMatches, 16 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=406, Invalid=3134, Unknown=0, NotChecked=0, Total=3540 [2021-12-17 15:15:17,940 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 86 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:17,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 726 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 15:15:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 15:15:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 111. [2021-12-17 15:15:17,950 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) [2021-12-17 15:15:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 149 transitions. [2021-12-17 15:15:17,951 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 149 transitions. Word has length 67 [2021-12-17 15:15:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:17,951 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 149 transitions. [2021-12-17 15:15:17,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 2.25) internal successors, (90), 36 states have internal predecessors, (90), 17 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (23), 13 states have call predecessors, (23), 17 states have call successors, (23) [2021-12-17 15:15:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 149 transitions. [2021-12-17 15:15:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 15:15:17,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:17,952 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:15:17,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:18,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 15:15:18,164 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:18,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1155297274, now seen corresponding path program 14 times [2021-12-17 15:15:18,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:18,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176182837] [2021-12-17 15:15:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:18,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:18,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:15:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:18,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:18,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:18,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:18,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:18,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 15:15:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:18,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:18,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 15:15:18,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:18,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176182837] [2021-12-17 15:15:18,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176182837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:18,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627910168] [2021-12-17 15:15:18,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:15:18,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:18,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:18,438 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) [2021-12-17 15:15:18,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 15:15:18,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:15:18,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:15:18,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 15:15:18,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 15:15:19,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:26,413 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aux_mod_aux_div_v_gcd_#in~y2_BEFORE_CALL_32_81_58| Int)) (or (<= 2 |aux_mod_aux_div_v_gcd_#in~y2_BEFORE_CALL_32_81_58|) (< |aux_mod_aux_div_v_gcd_#in~y2_BEFORE_CALL_32_81_58| 0) (let ((.cse2 (div |c_gcd_#in~y1| 2))) (let ((.cse1 (div (+ (* |aux_mod_aux_div_v_gcd_#in~y2_BEFORE_CALL_32_81_58| (- 1)) .cse2) 2))) (and (let ((.cse0 (div (+ |aux_mod_aux_div_v_gcd_#in~y2_BEFORE_CALL_32_81_58| (- 2)) 2))) (or (<= |c_gcd_#res| (+ .cse0 .cse1 2)) (<= |c_gcd_#res| (+ .cse0 .cse2 1)))) (<= (div (+ |aux_mod_aux_div_v_gcd_#in~y2_BEFORE_CALL_32_81_58| (* |c_gcd_#res| (- 1)) (- 1)) (- 2)) (+ .cse1 1)) (forall ((|aux_mod_aux_div_aux_mod_v_gcd_#in~y2_BEFORE_CALL_32_81_168_136| Int) (|aux_div_aux_div_aux_mod_v_gcd_#in~y2_BEFORE_CALL_32_81_168_136| Int)) (let ((.cse3 (+ |aux_mod_aux_div_v_gcd_#in~y2_BEFORE_CALL_32_81_58| (* 2 |aux_div_aux_div_aux_mod_v_gcd_#in~y2_BEFORE_CALL_32_81_168_136|)))) (or (<= |aux_div_aux_div_aux_mod_v_gcd_#in~y2_BEFORE_CALL_32_81_168_136| (+ (div (+ (* |aux_mod_aux_div_aux_mod_v_gcd_#in~y2_BEFORE_CALL_32_81_168_136| (- 2)) (* |aux_div_aux_div_aux_mod_v_gcd_#in~y2_BEFORE_CALL_32_81_168_136| 4) (- 4)) 4) 1)) (< .cse3 (+ |aux_mod_aux_div_aux_mod_v_gcd_#in~y2_BEFORE_CALL_32_81_168_136| |c_gcd_#in~y1| 1)) (<= 2 |aux_mod_aux_div_aux_mod_v_gcd_#in~y2_BEFORE_CALL_32_81_168_136|) (<= (+ |aux_mod_aux_div_aux_mod_v_gcd_#in~y2_BEFORE_CALL_32_81_168_136| |c_gcd_#res| 2) .cse3))))))))) is different from false [2021-12-17 15:15:37,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627910168] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:37,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:15:37,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-12-17 15:15:37,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341188489] [2021-12-17 15:15:37,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:37,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 15:15:37,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 15:15:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2372, Unknown=3, NotChecked=98, Total=2652 [2021-12-17 15:15:37,001 INFO L87 Difference]: Start difference. First operand 111 states and 149 transitions. Second operand has 36 states, 32 states have (on average 2.03125) internal successors, (65), 26 states have internal predecessors, (65), 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) [2021-12-17 15:15:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:37,929 INFO L93 Difference]: Finished difference Result 183 states and 253 transitions. [2021-12-17 15:15:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 15:15:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.03125) internal successors, (65), 26 states have internal predecessors, (65), 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 [2021-12-17 15:15:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:37,931 INFO L225 Difference]: With dead ends: 183 [2021-12-17 15:15:37,931 INFO L226 Difference]: Without dead ends: 179 [2021-12-17 15:15:37,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 81 SyntacticMatches, 10 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=423, Invalid=3738, Unknown=3, NotChecked=126, Total=4290 [2021-12-17 15:15:37,933 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:37,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 448 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:15:37,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-17 15:15:37,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 96. [2021-12-17 15:15:37,947 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) [2021-12-17 15:15:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2021-12-17 15:15:37,948 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 67 [2021-12-17 15:15:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:37,949 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2021-12-17 15:15:37,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.03125) internal successors, (65), 26 states have internal predecessors, (65), 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) [2021-12-17 15:15:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2021-12-17 15:15:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 15:15:37,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:37,950 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:15:37,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:38,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:38,151 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:38,151 INFO L85 PathProgramCache]: Analyzing trace with hash -37775706, now seen corresponding path program 15 times [2021-12-17 15:15:38,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:38,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542532660] [2021-12-17 15:15:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:38,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:38,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:15:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:38,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:38,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:38,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:38,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:38,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-17 15:15:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:38,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:38,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 15:15:38,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:38,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542532660] [2021-12-17 15:15:38,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542532660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:38,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015934298] [2021-12-17 15:15:38,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:15:38,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:38,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:38,490 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) [2021-12-17 15:15:38,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 15:15:38,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 15:15:38,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:15:38,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 15:15:38,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 15:15:39,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:47,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015934298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:47,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:15:47,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2021-12-17 15:15:47,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886638874] [2021-12-17 15:15:47,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:47,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 15:15:47,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 15:15:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1517, Unknown=1, NotChecked=0, Total=1640 [2021-12-17 15:15:47,468 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) [2021-12-17 15:15:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:48,652 INFO L93 Difference]: Finished difference Result 172 states and 231 transitions. [2021-12-17 15:15:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 15:15:48,653 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 [2021-12-17 15:15:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:48,654 INFO L225 Difference]: With dead ends: 172 [2021-12-17 15:15:48,654 INFO L226 Difference]: Without dead ends: 168 [2021-12-17 15:15:48,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=345, Invalid=3194, Unknown=1, NotChecked=0, Total=3540 [2021-12-17 15:15:48,654 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 52 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:48,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 642 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 15:15:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-17 15:15:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 63. [2021-12-17 15:15:48,658 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) [2021-12-17 15:15:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-17 15:15:48,659 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 67 [2021-12-17 15:15:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:48,659 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-17 15:15:48,659 INFO L471 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) [2021-12-17 15:15:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-17 15:15:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 15:15:48,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:48,660 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:15:48,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:48,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:48,861 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:48,861 INFO L85 PathProgramCache]: Analyzing trace with hash -835098444, now seen corresponding path program 5 times [2021-12-17 15:15:48,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:48,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462413683] [2021-12-17 15:15:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:48,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:15:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:48,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 15:15:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 15:15:49,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:49,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462413683] [2021-12-17 15:15:49,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462413683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:49,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121144184] [2021-12-17 15:15:49,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:15:49,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:49,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:49,168 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) [2021-12-17 15:15:49,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 15:15:49,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 15:15:49,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:15:49,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 15:15:49,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 15:15:49,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:15:51,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121144184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:15:51,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:15:51,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 39 [2021-12-17 15:15:51,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566030570] [2021-12-17 15:15:51,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:51,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 15:15:51,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:51,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 15:15:51,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 15:15:51,439 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 39 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 32 states have internal predecessors, (80), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-17 15:15:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:51,949 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-12-17 15:15:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 15:15:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 32 states have internal predecessors, (80), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) Word has length 58 [2021-12-17 15:15:51,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:51,950 INFO L225 Difference]: With dead ends: 85 [2021-12-17 15:15:51,950 INFO L226 Difference]: Without dead ends: 76 [2021-12-17 15:15:51,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 91 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 15:15:51,952 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:51,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 399 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:15:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-17 15:15:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-12-17 15:15:51,955 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) [2021-12-17 15:15:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-12-17 15:15:51,956 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 58 [2021-12-17 15:15:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:51,956 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-12-17 15:15:51,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 32 states have internal predecessors, (80), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-17 15:15:51,957 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-12-17 15:15:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 15:15:51,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:51,957 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:15:51,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:52,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-17 15:15:52,168 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:52,168 INFO L85 PathProgramCache]: Analyzing trace with hash -551668204, now seen corresponding path program 16 times [2021-12-17 15:15:52,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:52,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2900668] [2021-12-17 15:15:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:52,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:52,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:15:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:52,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:52,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:52,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 15:15:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:52,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:52,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:52,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 15:15:52,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:52,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2900668] [2021-12-17 15:15:52,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2900668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:52,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730689804] [2021-12-17 15:15:52,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:15:52,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:52,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:52,479 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) [2021-12-17 15:15:52,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 15:15:52,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:15:52,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:15:52,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 15:15:52,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 15:15:53,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:15:56,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730689804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:56,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:15:56,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-12-17 15:15:56,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358040584] [2021-12-17 15:15:56,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:15:56,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 15:15:56,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:15:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 15:15:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 15:15:56,977 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) [2021-12-17 15:15:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:15:57,618 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2021-12-17 15:15:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 15:15:57,619 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 [2021-12-17 15:15:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:15:57,619 INFO L225 Difference]: With dead ends: 89 [2021-12-17 15:15:57,619 INFO L226 Difference]: Without dead ends: 80 [2021-12-17 15:15:57,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 75 SyntacticMatches, 14 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 15:15:57,620 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:15:57,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 490 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:15:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-17 15:15:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2021-12-17 15:15:57,623 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) [2021-12-17 15:15:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2021-12-17 15:15:57,623 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 58 [2021-12-17 15:15:57,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:15:57,624 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2021-12-17 15:15:57,624 INFO L471 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) [2021-12-17 15:15:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2021-12-17 15:15:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 15:15:57,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:15:57,624 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:15:57,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-17 15:15:57,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-17 15:15:57,825 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:15:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:15:57,825 INFO L85 PathProgramCache]: Analyzing trace with hash 590358656, now seen corresponding path program 17 times [2021-12-17 15:15:57,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:15:57,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319393409] [2021-12-17 15:15:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:15:57,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:15:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:57,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:15:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:57,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:57,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:57,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:15:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:58,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:15:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:58,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:58,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:58,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:15:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:15:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 15:15:58,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:15:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319393409] [2021-12-17 15:15:58,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319393409] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:15:58,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811032241] [2021-12-17 15:15:58,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:15:58,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:15:58,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:15:58,188 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) [2021-12-17 15:15:58,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 15:15:58,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 15:15:58,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:15:58,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 15:15:58,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:15:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 15:15:59,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:16:01,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811032241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:16:01,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:16:01,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-12-17 15:16:01,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025419418] [2021-12-17 15:16:01,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:01,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 15:16:01,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:16:01,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 15:16:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1215, Unknown=2, NotChecked=0, Total=1332 [2021-12-17 15:16:01,730 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) [2021-12-17 15:16:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:02,376 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-12-17 15:16:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 15:16:02,376 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 [2021-12-17 15:16:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:02,377 INFO L225 Difference]: With dead ends: 90 [2021-12-17 15:16:02,377 INFO L226 Difference]: Without dead ends: 81 [2021-12-17 15:16:02,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 85 SyntacticMatches, 13 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=247, Invalid=2007, Unknown=2, NotChecked=0, Total=2256 [2021-12-17 15:16:02,378 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:02,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 484 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:16:02,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-17 15:16:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2021-12-17 15:16:02,380 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) [2021-12-17 15:16:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2021-12-17 15:16:02,381 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2021-12-17 15:16:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:02,381 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2021-12-17 15:16:02,382 INFO L471 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) [2021-12-17 15:16:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2021-12-17 15:16:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 15:16:02,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:02,383 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:16:02,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-17 15:16:02,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:16:02,613 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:02,613 INFO L85 PathProgramCache]: Analyzing trace with hash 720804832, now seen corresponding path program 6 times [2021-12-17 15:16:02,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:16:02,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490714179] [2021-12-17 15:16:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:02,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:16:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:02,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:16:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:02,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:16:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:02,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:16:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:02,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:16:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:02,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:16:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:02,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:02,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:02,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 15:16:02,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:16:02,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490714179] [2021-12-17 15:16:02,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490714179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:16:02,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774773576] [2021-12-17 15:16:02,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:16:02,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:16:02,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:16:02,856 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) [2021-12-17 15:16:02,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-17 15:16:03,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-17 15:16:03,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:16:03,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 15:16:03,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 15:16:03,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:16:08,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774773576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:16:08,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:16:08,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-12-17 15:16:08,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758139325] [2021-12-17 15:16:08,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:08,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 15:16:08,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:16:08,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 15:16:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=737, Unknown=1, NotChecked=0, Total=812 [2021-12-17 15:16:08,335 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) [2021-12-17 15:16:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:08,863 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2021-12-17 15:16:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 15:16:08,863 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 [2021-12-17 15:16:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:08,864 INFO L225 Difference]: With dead ends: 101 [2021-12-17 15:16:08,864 INFO L226 Difference]: Without dead ends: 97 [2021-12-17 15:16:08,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=157, Invalid=1402, Unknown=1, NotChecked=0, Total=1560 [2021-12-17 15:16:08,865 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:08,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 538 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:16:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-17 15:16:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2021-12-17 15:16:08,868 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) [2021-12-17 15:16:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2021-12-17 15:16:08,868 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2021-12-17 15:16:08,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:08,869 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2021-12-17 15:16:08,869 INFO L471 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) [2021-12-17 15:16:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2021-12-17 15:16:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 15:16:08,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:08,869 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:16:08,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:09,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:16:09,070 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:09,070 INFO L85 PathProgramCache]: Analyzing trace with hash 354934560, now seen corresponding path program 18 times [2021-12-17 15:16:09,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:16:09,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419248930] [2021-12-17 15:16:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:09,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:16:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:09,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:16:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:09,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:16:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:09,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:16:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:09,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:16:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:09,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:16:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:09,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:09,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:09,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 15:16:09,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:16:09,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419248930] [2021-12-17 15:16:09,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419248930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:16:09,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338709323] [2021-12-17 15:16:09,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:16:09,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:16:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:16:09,417 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) [2021-12-17 15:16:09,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-17 15:16:09,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-17 15:16:09,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:16:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 15:16:09,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 15:16:10,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:16:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 15:16:12,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338709323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:16:12,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:16:12,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 22] total 41 [2021-12-17 15:16:12,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121154795] [2021-12-17 15:16:12,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:12,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 15:16:12,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:16:12,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 15:16:12,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 15:16:12,359 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) [2021-12-17 15:16:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:12,926 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2021-12-17 15:16:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 15:16:12,926 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 [2021-12-17 15:16:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:12,927 INFO L225 Difference]: With dead ends: 102 [2021-12-17 15:16:12,927 INFO L226 Difference]: Without dead ends: 93 [2021-12-17 15:16:12,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 107 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=277, Invalid=2375, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 15:16:12,928 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:12,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 458 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:16:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-17 15:16:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2021-12-17 15:16:12,931 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) [2021-12-17 15:16:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2021-12-17 15:16:12,931 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2021-12-17 15:16:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:12,932 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2021-12-17 15:16:12,932 INFO L471 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) [2021-12-17 15:16:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2021-12-17 15:16:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 15:16:12,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:12,932 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:16:12,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:13,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:16:13,133 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:13,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:13,133 INFO L85 PathProgramCache]: Analyzing trace with hash 485380736, now seen corresponding path program 19 times [2021-12-17 15:16:13,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:16:13,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927007709] [2021-12-17 15:16:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:13,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:16:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 15:16:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:16:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:16:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 15:16:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 15:16:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:16:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 15:16:13,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:16:13,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927007709] [2021-12-17 15:16:13,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927007709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:16:13,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161628914] [2021-12-17 15:16:13,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:16:13,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:16:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:16:13,410 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) [2021-12-17 15:16:13,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-17 15:16:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:13,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-17 15:16:13,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:24,346 WARN L228 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-17 15:16:24,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-12-17 15:16:24,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-17 15:16:24,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 15:16:24,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-17 15:16:24,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248380260] [2021-12-17 15:16:24,350 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:24,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 15:16:24,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:16:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 15:16:24,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-12-17 15:16:24,351 INFO L87 Difference]: Start difference. First operand 82 states and 101 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), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 15:16:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 15:16:24,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-12-17 15:16:24,352 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:24,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:16:24,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:24,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-17 15:16:24,553 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5a87cbfa at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-17 15:16:24,559 INFO L158 Benchmark]: Toolchain (without parser) took 353303.20ms. Allocated memory was 102.8MB in the beginning and 264.2MB in the end (delta: 161.5MB). Free memory was 68.9MB in the beginning and 188.7MB in the end (delta: -119.9MB). Peak memory consumption was 41.5MB. Max. memory is 16.1GB. [2021-12-17 15:16:24,559 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 102.8MB. Free memory was 75.2MB in the beginning and 75.2MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 15:16:24,559 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.81ms. Allocated memory is still 102.8MB. Free memory was 68.7MB in the beginning and 78.4MB in the end (delta: -9.7MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2021-12-17 15:16:24,559 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.97ms. Allocated memory is still 102.8MB. Free memory was 78.4MB in the beginning and 77.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 15:16:24,559 INFO L158 Benchmark]: Boogie Preprocessor took 28.05ms. Allocated memory is still 102.8MB. Free memory was 77.1MB in the beginning and 76.2MB in the end (delta: 967.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 15:16:24,560 INFO L158 Benchmark]: RCFGBuilder took 215.64ms. Allocated memory is still 102.8MB. Free memory was 76.2MB in the beginning and 65.8MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 15:16:24,560 INFO L158 Benchmark]: TraceAbstraction took 352835.83ms. Allocated memory was 102.8MB in the beginning and 264.2MB in the end (delta: 161.5MB). Free memory was 65.7MB in the beginning and 188.7MB in the end (delta: -123.0MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. [2021-12-17 15:16:24,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 102.8MB. Free memory was 75.2MB in the beginning and 75.2MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 198.81ms. Allocated memory is still 102.8MB. Free memory was 68.7MB in the beginning and 78.4MB in the end (delta: -9.7MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.97ms. Allocated memory is still 102.8MB. Free memory was 78.4MB in the beginning and 77.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.05ms. Allocated memory is still 102.8MB. Free memory was 77.1MB in the beginning and 76.2MB in the end (delta: 967.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 215.64ms. Allocated memory is still 102.8MB. Free memory was 76.2MB in the beginning and 65.8MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 352835.83ms. Allocated memory was 102.8MB in the beginning and 264.2MB in the end (delta: 161.5MB). Free memory was 65.7MB in the beginning and 188.7MB in the end (delta: -123.0MB). Peak memory consumption was 40.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5a87cbfa de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5a87cbfa: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_Bitvector.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-tmp.no-commuhash-c3fed41 [2021-12-17 15:16:26,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:16:26,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:16:26,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:16:26,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:16:26,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:16:26,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:16:26,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:16:26,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:16:26,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:16:26,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:16:26,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:16:26,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:16:26,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:16:26,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:16:26,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:16:26,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:16:26,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:16:26,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:16:26,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:16:26,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:16:26,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:16:26,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:16:26,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:16:26,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:16:26,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:16:26,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:16:26,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:16:26,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:16:26,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:16:26,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:16:26,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:16:26,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:16:26,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:16:26,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:16:26,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:16:26,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:16:26,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:16:26,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:16:26,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:16:26,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:16:26,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 15:16:26,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:16:26,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:16:26,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:16:26,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:16:26,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:16:26,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:16:26,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:16:26,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:16:26,442 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:16:26,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:16:26,443 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:16:26,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:16:26,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:16:26,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:16:26,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:16:26,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:16:26,444 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 15:16:26,445 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 15:16:26,445 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 15:16:26,445 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:16:26,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:16:26,445 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:16:26,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:16:26,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:16:26,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:16:26,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:16:26,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:16:26,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:16:26,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:16:26,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:16:26,447 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 15:16:26,447 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 15:16:26,447 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:16:26,447 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:16:26,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:16:26,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:16:26,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 15:16:26,448 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 [2021-12-17 15:16:26,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:16:26,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:16:26,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:16:26,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:16:26,804 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:16:26,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd02.c [2021-12-17 15:16:26,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baaf991db/6929894000ec4d24b6ddbaa7db41bdae/FLAG6247f00a1 [2021-12-17 15:16:27,193 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:16:27,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c [2021-12-17 15:16:27,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baaf991db/6929894000ec4d24b6ddbaa7db41bdae/FLAG6247f00a1 [2021-12-17 15:16:27,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baaf991db/6929894000ec4d24b6ddbaa7db41bdae [2021-12-17 15:16:27,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:16:27,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:16:27,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:16:27,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:16:27,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:16:27,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63504dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27, skipping insertion in model container [2021-12-17 15:16:27,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:16:27,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:16:27,324 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] [2021-12-17 15:16:27,332 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] [2021-12-17 15:16:27,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:16:27,342 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:16:27,351 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] [2021-12-17 15:16:27,368 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] [2021-12-17 15:16:27,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:16:27,411 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:16:27,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27 WrapperNode [2021-12-17 15:16:27,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:16:27,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:16:27,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:16:27,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:16:27,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,435 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2021-12-17 15:16:27,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:16:27,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:16:27,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:16:27,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:16:27,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:16:27,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:16:27,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:16:27,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:16:27,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (1/1) ... [2021-12-17 15:16:27,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:16:27,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:16:27,513 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) [2021-12-17 15:16:27,551 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 [2021-12-17 15:16:27,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:16:27,578 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-12-17 15:16:27,578 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-12-17 15:16:27,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 15:16:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2021-12-17 15:16:27,579 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2021-12-17 15:16:27,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:16:27,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:16:27,631 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:16:27,632 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:16:27,773 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:16:27,777 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:16:27,777 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 15:16:27,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:16:27 BoogieIcfgContainer [2021-12-17 15:16:27,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:16:27,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:16:27,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:16:27,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:16:27,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:16:27" (1/3) ... [2021-12-17 15:16:27,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86c874c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:16:27, skipping insertion in model container [2021-12-17 15:16:27,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:16:27" (2/3) ... [2021-12-17 15:16:27,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86c874c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:16:27, skipping insertion in model container [2021-12-17 15:16:27,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:16:27" (3/3) ... [2021-12-17 15:16:27,784 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd02.c [2021-12-17 15:16:27,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:16:27,787 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 15:16:27,822 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:16:27,827 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 15:16:27,827 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 15:16:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 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) [2021-12-17 15:16:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 15:16:27,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:27,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:16:27,842 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:27,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1040974318, now seen corresponding path program 1 times [2021-12-17 15:16:27,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:27,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135891055] [2021-12-17 15:16:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:27,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:27,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:27,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:27,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 15:16:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 15:16:27,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:16:28,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:16:28,076 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:28,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135891055] [2021-12-17 15:16:28,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135891055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:16:28,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:16:28,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:16:28,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502560469] [2021-12-17 15:16:28,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:16:28,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:16:28,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:16:28,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:16:28,100 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 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, 5 states have (on average 1.6) 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) [2021-12-17 15:16:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:28,197 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2021-12-17 15:16:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:16:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) 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 [2021-12-17 15:16:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:28,204 INFO L225 Difference]: With dead ends: 76 [2021-12-17 15:16:28,209 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 15:16:28,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 15:16:28,216 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 38 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:28,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 128 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:16:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 15:16:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-17 15:16:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 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) [2021-12-17 15:16:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-12-17 15:16:28,276 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 9 [2021-12-17 15:16:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:28,277 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-12-17 15:16:28,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) 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) [2021-12-17 15:16:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-12-17 15:16:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 15:16:28,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:28,280 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:16:28,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-17 15:16:28,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:16:28,481 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:28,482 INFO L85 PathProgramCache]: Analyzing trace with hash 205423379, now seen corresponding path program 1 times [2021-12-17 15:16:28,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:28,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996182415] [2021-12-17 15:16:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:28,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:28,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:28,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:28,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 15:16:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:28,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 15:16:28,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:16:28,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:16:28,869 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:28,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996182415] [2021-12-17 15:16:28,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996182415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:16:28,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:16:28,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 15:16:28,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709875166] [2021-12-17 15:16:28,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:16:28,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 15:16:28,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 15:16:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 15:16:28,873 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2021-12-17 15:16:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:29,427 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2021-12-17 15:16:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:16:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 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 [2021-12-17 15:16:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:29,430 INFO L225 Difference]: With dead ends: 64 [2021-12-17 15:16:29,431 INFO L226 Difference]: Without dead ends: 62 [2021-12-17 15:16:29,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:16:29,432 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 63 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:29,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 123 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:16:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-17 15:16:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-12-17 15:16:29,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 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) [2021-12-17 15:16:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2021-12-17 15:16:29,451 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 14 [2021-12-17 15:16:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:29,451 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2021-12-17 15:16:29,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2021-12-17 15:16:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2021-12-17 15:16:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 15:16:29,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:29,452 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:16:29,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:29,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:16:29,659 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:29,660 INFO L85 PathProgramCache]: Analyzing trace with hash 208253524, now seen corresponding path program 1 times [2021-12-17 15:16:29,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:29,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740043698] [2021-12-17 15:16:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:29,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:29,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:29,668 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:29,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 15:16:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:29,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 15:16:29,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:16:30,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:16:30,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:30,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740043698] [2021-12-17 15:16:30,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740043698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:16:30,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:16:30,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 15:16:30,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291455730] [2021-12-17 15:16:30,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:16:30,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 15:16:30,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:30,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 15:16:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 15:16:30,005 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2021-12-17 15:16:30,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:30,674 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2021-12-17 15:16:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:16:30,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 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 [2021-12-17 15:16:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:30,677 INFO L225 Difference]: With dead ends: 62 [2021-12-17 15:16:30,677 INFO L226 Difference]: Without dead ends: 60 [2021-12-17 15:16:30,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:16:30,679 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:30,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 225 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:16:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-17 15:16:30,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2021-12-17 15:16:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 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) [2021-12-17 15:16:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-12-17 15:16:30,687 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 14 [2021-12-17 15:16:30,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:30,687 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-12-17 15:16:30,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2021-12-17 15:16:30,688 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-12-17 15:16:30,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 15:16:30,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:30,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:16:30,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-17 15:16:30,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:16:30,895 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1495973176, now seen corresponding path program 1 times [2021-12-17 15:16:30,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:30,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354563883] [2021-12-17 15:16:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:30,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:30,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:30,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 15:16:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:30,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 15:16:30,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:16:30,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:16:30,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:30,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354563883] [2021-12-17 15:16:30,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354563883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:16:30,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:16:30,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:16:30,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188975195] [2021-12-17 15:16:30,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:16:30,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:16:30,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:30,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:16:30,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:16:30,995 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-12-17 15:16:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:31,027 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2021-12-17 15:16:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:16:31,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 19 [2021-12-17 15:16:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:31,029 INFO L225 Difference]: With dead ends: 53 [2021-12-17 15:16:31,030 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 15:16:31,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:16:31,031 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:31,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 92 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:16:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 15:16:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-17 15:16:31,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 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) [2021-12-17 15:16:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2021-12-17 15:16:31,037 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 19 [2021-12-17 15:16:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:31,037 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2021-12-17 15:16:31,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-12-17 15:16:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2021-12-17 15:16:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-17 15:16:31,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:31,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:16:31,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:31,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:16:31,245 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:31,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash -846482762, now seen corresponding path program 1 times [2021-12-17 15:16:31,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:31,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806366665] [2021-12-17 15:16:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:31,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:31,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:31,253 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:31,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 15:16:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 15:16:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:16:31,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:16:31,407 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:31,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806366665] [2021-12-17 15:16:31,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806366665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:16:31,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:16:31,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 15:16:31,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128862807] [2021-12-17 15:16:31,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:16:31,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 15:16:31,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 15:16:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 15:16:31,410 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2021-12-17 15:16:31,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:31,563 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-12-17 15:16:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:16:31,564 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 20 [2021-12-17 15:16:31,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:31,564 INFO L225 Difference]: With dead ends: 66 [2021-12-17 15:16:31,564 INFO L226 Difference]: Without dead ends: 63 [2021-12-17 15:16:31,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:16:31,565 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:31,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 106 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:16:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-17 15:16:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-12-17 15:16:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 41 states have internal predecessors, (46), 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) [2021-12-17 15:16:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-12-17 15:16:31,578 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 20 [2021-12-17 15:16:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:31,578 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-12-17 15:16:31,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2021-12-17 15:16:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-12-17 15:16:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 15:16:31,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:31,582 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:16:31,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:31,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:16:31,795 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1992024960, now seen corresponding path program 1 times [2021-12-17 15:16:31,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:31,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159593276] [2021-12-17 15:16:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:31,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:31,798 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:31,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 15:16:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:31,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 15:16:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:16:31,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:16:31,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:31,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159593276] [2021-12-17 15:16:31,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159593276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:16:31,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:16:31,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:16:31,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535028266] [2021-12-17 15:16:31,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:16:31,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:16:31,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:16:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:16:31,870 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-12-17 15:16:31,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:31,878 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2021-12-17 15:16:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:16:31,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 3 states have internal predecessors, (18), 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 26 [2021-12-17 15:16:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:31,880 INFO L225 Difference]: With dead ends: 62 [2021-12-17 15:16:31,880 INFO L226 Difference]: Without dead ends: 54 [2021-12-17 15:16:31,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:16:31,880 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:31,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:16:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-17 15:16:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-17 15:16:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 39 states have internal predecessors, (44), 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) [2021-12-17 15:16:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-12-17 15:16:31,888 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 26 [2021-12-17 15:16:31,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:31,888 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-12-17 15:16:31,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-12-17 15:16:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-12-17 15:16:31,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 15:16:31,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:31,901 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:16:31,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:32,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:16:32,107 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash -61348414, now seen corresponding path program 1 times [2021-12-17 15:16:32,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:32,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991879130] [2021-12-17 15:16:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:32,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:32,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:32,110 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:32,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 15:16:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:32,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 15:16:32,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:16:32,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:16:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 15:16:33,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:33,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991879130] [2021-12-17 15:16:33,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991879130] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:16:33,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:16:33,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-12-17 15:16:33,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852748233] [2021-12-17 15:16:33,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:33,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 15:16:33,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:33,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 15:16:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-17 15:16:33,770 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 15:16:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:34,486 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2021-12-17 15:16:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 15:16:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 27 [2021-12-17 15:16:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:34,487 INFO L225 Difference]: With dead ends: 70 [2021-12-17 15:16:34,488 INFO L226 Difference]: Without dead ends: 67 [2021-12-17 15:16:34,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-12-17 15:16:34,489 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:34,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 150 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 15:16:34,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-17 15:16:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-12-17 15:16:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 41 states have internal predecessors, (46), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-17 15:16:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-12-17 15:16:34,495 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 27 [2021-12-17 15:16:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:34,495 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-12-17 15:16:34,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 15:16:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-12-17 15:16:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 15:16:34,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:34,496 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:16:34,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:34,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:16:34,703 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:34,704 INFO L85 PathProgramCache]: Analyzing trace with hash -138655678, now seen corresponding path program 1 times [2021-12-17 15:16:34,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:34,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786206996] [2021-12-17 15:16:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:34,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:34,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:34,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:34,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 15:16:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 15:16:34,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:16:35,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:16:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 15:16:36,206 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:36,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786206996] [2021-12-17 15:16:36,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786206996] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:16:36,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:16:36,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2021-12-17 15:16:36,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224116636] [2021-12-17 15:16:36,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:36,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 15:16:36,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:36,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 15:16:36,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-12-17 15:16:36,208 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 26 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 15:16:37,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:37,033 INFO L93 Difference]: Finished difference Result 98 states and 131 transitions. [2021-12-17 15:16:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 15:16:37,035 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 28 [2021-12-17 15:16:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:37,036 INFO L225 Difference]: With dead ends: 98 [2021-12-17 15:16:37,036 INFO L226 Difference]: Without dead ends: 95 [2021-12-17 15:16:37,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 15:16:37,037 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:37,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 225 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 294 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2021-12-17 15:16:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-17 15:16:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2021-12-17 15:16:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 46 states have internal predecessors, (51), 11 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (21), 14 states have call predecessors, (21), 11 states have call successors, (21) [2021-12-17 15:16:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2021-12-17 15:16:37,063 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 28 [2021-12-17 15:16:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:37,063 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2021-12-17 15:16:37,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 15:16:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2021-12-17 15:16:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 15:16:37,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:37,064 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:16:37,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-17 15:16:37,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:16:37,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:37,265 INFO L85 PathProgramCache]: Analyzing trace with hash -570806558, now seen corresponding path program 1 times [2021-12-17 15:16:37,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:37,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796434675] [2021-12-17 15:16:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:37,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:37,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:37,267 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:37,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 15:16:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 15:16:37,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:16:37,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 15:16:37,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:37,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796434675] [2021-12-17 15:16:37,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796434675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:16:37,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:16:37,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 15:16:37,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432244043] [2021-12-17 15:16:37,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:16:37,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 15:16:37,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:37,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 15:16:37,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-17 15:16:37,443 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-12-17 15:16:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:37,602 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2021-12-17 15:16:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 15:16:37,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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 28 [2021-12-17 15:16:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:37,604 INFO L225 Difference]: With dead ends: 84 [2021-12-17 15:16:37,604 INFO L226 Difference]: Without dead ends: 81 [2021-12-17 15:16:37,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:16:37,605 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:37,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 105 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:16:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-17 15:16:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2021-12-17 15:16:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.148936170212766) internal successors, (54), 48 states have internal predecessors, (54), 11 states have call successors, (11), 4 states have call predecessors, (11), 10 states have return successors, (24), 16 states have call predecessors, (24), 11 states have call successors, (24) [2021-12-17 15:16:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2021-12-17 15:16:37,612 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 28 [2021-12-17 15:16:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:37,612 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2021-12-17 15:16:37,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-12-17 15:16:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2021-12-17 15:16:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 15:16:37,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:37,613 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:16:37,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:37,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:16:37,819 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:37,819 INFO L85 PathProgramCache]: Analyzing trace with hash 5136450, now seen corresponding path program 1 times [2021-12-17 15:16:37,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:37,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593578144] [2021-12-17 15:16:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:37,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:37,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:37,823 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:37,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 15:16:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:37,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 15:16:37,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:16:38,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:16:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:16:46,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:46,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593578144] [2021-12-17 15:16:46,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593578144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:16:46,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:16:46,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-12-17 15:16:46,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867737397] [2021-12-17 15:16:46,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:46,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 15:16:46,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:46,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 15:16:46,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-12-17 15:16:46,452 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 15:16:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:16:49,769 INFO L93 Difference]: Finished difference Result 107 states and 145 transitions. [2021-12-17 15:16:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 15:16:49,770 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) Word has length 42 [2021-12-17 15:16:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:16:49,771 INFO L225 Difference]: With dead ends: 107 [2021-12-17 15:16:49,771 INFO L226 Difference]: Without dead ends: 104 [2021-12-17 15:16:49,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 15:16:49,772 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:16:49,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 343 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 434 Invalid, 0 Unknown, 66 Unchecked, 1.9s Time] [2021-12-17 15:16:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-17 15:16:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2021-12-17 15:16:49,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 56 states have (on average 1.125) internal successors, (63), 57 states have internal predecessors, (63), 12 states have call successors, (12), 4 states have call predecessors, (12), 14 states have return successors, (36), 21 states have call predecessors, (36), 12 states have call successors, (36) [2021-12-17 15:16:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2021-12-17 15:16:49,787 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 42 [2021-12-17 15:16:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:16:49,788 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2021-12-17 15:16:49,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 15:16:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2021-12-17 15:16:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 15:16:49,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:16:49,792 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:16:49,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 15:16:49,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:16:49,998 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:16:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:16:49,998 INFO L85 PathProgramCache]: Analyzing trace with hash 40120034, now seen corresponding path program 1 times [2021-12-17 15:16:49,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:16:49,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940721891] [2021-12-17 15:16:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:16:49,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:16:49,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:16:50,000 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:16:50,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 15:16:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:16:50,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 15:16:50,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:16:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:16:50,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:16:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:16:59,878 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:16:59,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940721891] [2021-12-17 15:16:59,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940721891] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:16:59,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:16:59,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-12-17 15:16:59,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903967284] [2021-12-17 15:16:59,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:16:59,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 15:16:59,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:16:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 15:16:59,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=619, Unknown=1, NotChecked=0, Total=702 [2021-12-17 15:16:59,880 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 15:17:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:17:01,512 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2021-12-17 15:17:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 15:17:01,513 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) Word has length 42 [2021-12-17 15:17:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:17:01,514 INFO L225 Difference]: With dead ends: 124 [2021-12-17 15:17:01,514 INFO L226 Difference]: Without dead ends: 115 [2021-12-17 15:17:01,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=183, Invalid=1298, Unknown=1, NotChecked=0, Total=1482 [2021-12-17 15:17:01,516 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 15:17:01,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 272 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 389 Invalid, 0 Unknown, 83 Unchecked, 0.8s Time] [2021-12-17 15:17:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-17 15:17:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2021-12-17 15:17:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 67 states have internal predecessors, (71), 14 states have call successors, (14), 5 states have call predecessors, (14), 17 states have return successors, (43), 24 states have call predecessors, (43), 14 states have call successors, (43) [2021-12-17 15:17:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2021-12-17 15:17:01,523 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 128 transitions. Word has length 42 [2021-12-17 15:17:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:17:01,523 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 128 transitions. [2021-12-17 15:17:01,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 15:17:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 128 transitions. [2021-12-17 15:17:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 15:17:01,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:17:01,524 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:17:01,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 15:17:01,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:17:01,728 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:17:01,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:17:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash 546938902, now seen corresponding path program 2 times [2021-12-17 15:17:01,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:17:01,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588390353] [2021-12-17 15:17:01,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:17:01,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:17:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:17:01,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:17:01,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 15:17:01,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:17:01,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:17:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-17 15:17:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:17:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 15:17:02,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:17:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:17:03,923 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:17:03,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588390353] [2021-12-17 15:17:03,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588390353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:17:03,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:17:03,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-12-17 15:17:03,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495682905] [2021-12-17 15:17:03,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:17:03,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 15:17:03,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:17:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 15:17:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-12-17 15:17:03,925 INFO L87 Difference]: Start difference. First operand 97 states and 128 transitions. Second operand has 28 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 15:17:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:17:05,242 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2021-12-17 15:17:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 15:17:05,242 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) Word has length 35 [2021-12-17 15:17:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:17:05,243 INFO L225 Difference]: With dead ends: 114 [2021-12-17 15:17:05,243 INFO L226 Difference]: Without dead ends: 98 [2021-12-17 15:17:05,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 15:17:05,244 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 15:17:05,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 214 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 352 Invalid, 0 Unknown, 25 Unchecked, 0.7s Time] [2021-12-17 15:17:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-17 15:17:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2021-12-17 15:17:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 12 states have call successors, (12), 4 states have call predecessors, (12), 14 states have return successors, (35), 20 states have call predecessors, (35), 12 states have call successors, (35) [2021-12-17 15:17:05,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2021-12-17 15:17:05,250 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 35 [2021-12-17 15:17:05,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:17:05,250 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2021-12-17 15:17:05,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 15:17:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2021-12-17 15:17:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 15:17:05,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:17:05,251 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:17:05,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-17 15:17:05,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:17:05,462 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:17:05,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:17:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2032408470, now seen corresponding path program 1 times [2021-12-17 15:17:05,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:17:05,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340532049] [2021-12-17 15:17:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:17:05,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:17:05,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:17:05,465 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:17:05,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 15:17:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 15:17:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:17:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 15:17:06,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:17:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 15:17:11,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:17:11,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340532049] [2021-12-17 15:17:11,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340532049] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:17:11,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:17:11,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-12-17 15:17:11,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835052888] [2021-12-17 15:17:11,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:17:11,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 15:17:11,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:17:11,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 15:17:11,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 15:17:11,592 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand has 33 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 15:17:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:17:14,511 INFO L93 Difference]: Finished difference Result 127 states and 174 transitions. [2021-12-17 15:17:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 15:17:14,511 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2021-12-17 15:17:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:17:14,512 INFO L225 Difference]: With dead ends: 127 [2021-12-17 15:17:14,512 INFO L226 Difference]: Without dead ends: 124 [2021-12-17 15:17:14,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 15:17:14,513 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:17:14,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 280 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 391 Invalid, 0 Unknown, 94 Unchecked, 0.9s Time] [2021-12-17 15:17:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-17 15:17:14,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2021-12-17 15:17:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 12 states have call successors, (12), 4 states have call predecessors, (12), 15 states have return successors, (37), 21 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-17 15:17:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 112 transitions. [2021-12-17 15:17:14,520 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 112 transitions. Word has length 36 [2021-12-17 15:17:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:17:14,520 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 112 transitions. [2021-12-17 15:17:14,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 8 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 15:17:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 112 transitions. [2021-12-17 15:17:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 15:17:14,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:17:14,521 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:17:14,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-17 15:17:14,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:17:14,725 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:17:14,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:17:14,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1620322346, now seen corresponding path program 2 times [2021-12-17 15:17:14,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:17:14,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238448670] [2021-12-17 15:17:14,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:17:14,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:17:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:17:14,726 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:17:14,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-17 15:17:14,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:17:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:17:14,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 15:17:14,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:17:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:17:15,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:17:15,663 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:17:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238448670] [2021-12-17 15:17:15,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238448670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:17:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [409012162] [2021-12-17 15:17:15,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:17:15,663 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 15:17:15,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 15:17:15,666 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 15:17:15,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-17 15:17:15,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:17:15,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:17:15,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-17 15:17:15,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:17:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 15:17:16,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:17:16,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [409012162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:17:16,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:17:16,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2021-12-17 15:17:16,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659512091] [2021-12-17 15:17:16,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:17:16,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 15:17:16,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:17:16,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 15:17:16,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-12-17 15:17:16,584 INFO L87 Difference]: Start difference. First operand 85 states and 112 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 15:17:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:17:17,140 INFO L93 Difference]: Finished difference Result 105 states and 140 transitions. [2021-12-17 15:17:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:17:17,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 36 [2021-12-17 15:17:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:17:17,142 INFO L225 Difference]: With dead ends: 105 [2021-12-17 15:17:17,142 INFO L226 Difference]: Without dead ends: 102 [2021-12-17 15:17:17,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 15:17:17,143 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:17:17,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 141 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:17:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-17 15:17:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2021-12-17 15:17:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 states have internal predecessors, (67), 12 states have call successors, (12), 4 states have call predecessors, (12), 16 states have return successors, (40), 24 states have call predecessors, (40), 12 states have call successors, (40) [2021-12-17 15:17:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2021-12-17 15:17:17,155 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 36 [2021-12-17 15:17:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:17:17,155 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2021-12-17 15:17:17,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 15:17:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2021-12-17 15:17:17,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 15:17:17,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:17:17,157 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:17:17,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-12-17 15:17:17,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-17 15:17:17,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:17:17,563 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:17:17,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:17:17,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1751043222, now seen corresponding path program 1 times [2021-12-17 15:17:17,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:17:17,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33058853] [2021-12-17 15:17:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:17:17,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:17:17,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:17:17,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:17:17,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-17 15:17:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:17,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 15:17:17,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:17:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 15:17:20,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:17:41,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:17:41,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33058853] [2021-12-17 15:17:41,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33058853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:17:41,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [732220079] [2021-12-17 15:17:41,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:17:41,476 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 15:17:41,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 15:17:41,478 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 15:17:41,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-17 15:17:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:17:41,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 15:17:41,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:17:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 15:17:46,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:18:07,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [732220079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:18:07,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:18:07,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 27 [2021-12-17 15:18:07,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27888664] [2021-12-17 15:18:07,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:18:07,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 15:18:07,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:18:07,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 15:18:07,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2181, Unknown=4, NotChecked=0, Total=2352 [2021-12-17 15:18:07,827 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 27 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 8 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-17 15:18:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:18:19,506 INFO L93 Difference]: Finished difference Result 122 states and 165 transitions. [2021-12-17 15:18:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 15:18:19,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 8 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 50 [2021-12-17 15:18:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:18:19,510 INFO L225 Difference]: With dead ends: 122 [2021-12-17 15:18:19,510 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 15:18:19,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=295, Invalid=3239, Unknown=6, NotChecked=0, Total=3540 [2021-12-17 15:18:19,516 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 15:18:19,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 396 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 592 Invalid, 0 Unknown, 76 Unchecked, 1.5s Time] [2021-12-17 15:18:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 15:18:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2021-12-17 15:18:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 states have internal predecessors, (67), 12 states have call successors, (12), 4 states have call predecessors, (12), 16 states have return successors, (40), 24 states have call predecessors, (40), 12 states have call successors, (40) [2021-12-17 15:18:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2021-12-17 15:18:19,523 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 50 [2021-12-17 15:18:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:18:19,523 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2021-12-17 15:18:19,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 22 states have internal predecessors, (45), 8 states have call successors, (8), 1 states have call predecessors, (8), 11 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-17 15:18:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2021-12-17 15:18:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 15:18:19,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:18:19,524 INFO L514 BasicCegarLoop]: 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] [2021-12-17 15:18:19,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-17 15:18:19,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-12-17 15:18:19,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-17 15:18:19,925 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:18:19,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:18:19,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1930355498, now seen corresponding path program 2 times [2021-12-17 15:18:19,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:18:19,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226220111] [2021-12-17 15:18:19,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:18:19,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:18:19,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:18:19,926 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:18:19,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-17 15:18:19,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:18:19,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:18:19,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 15:18:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:18:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 15:18:20,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:18:22,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:18:22,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226220111] [2021-12-17 15:18:22,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226220111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:18:22,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1304563596] [2021-12-17 15:18:22,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:18:22,394 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 15:18:22,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 15:18:22,395 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 15:18:22,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-17 15:18:22,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:18:22,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:18:22,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 15:18:22,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:18:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 15:18:25,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:18:57,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1304563596] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:18:57,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:18:57,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 31 [2021-12-17 15:18:57,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546011389] [2021-12-17 15:18:57,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:18:57,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 15:18:57,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:18:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 15:18:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2545, Unknown=5, NotChecked=0, Total=2756 [2021-12-17 15:18:57,137 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 31 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 15:19:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:19:12,681 INFO L93 Difference]: Finished difference Result 129 states and 181 transitions. [2021-12-17 15:19:12,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 15:19:12,682 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 50 [2021-12-17 15:19:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:19:12,683 INFO L225 Difference]: With dead ends: 129 [2021-12-17 15:19:12,683 INFO L226 Difference]: Without dead ends: 105 [2021-12-17 15:19:12,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=482, Invalid=4764, Unknown=10, NotChecked=0, Total=5256 [2021-12-17 15:19:12,685 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 73 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 15:19:12,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 240 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 15:19:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-17 15:19:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2021-12-17 15:19:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 56 states have internal predecessors, (61), 11 states have call successors, (11), 4 states have call predecessors, (11), 14 states have return successors, (34), 20 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-17 15:19:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 106 transitions. [2021-12-17 15:19:12,689 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 106 transitions. Word has length 50 [2021-12-17 15:19:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:19:12,689 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 106 transitions. [2021-12-17 15:19:12,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 25 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 15:19:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 106 transitions. [2021-12-17 15:19:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 15:19:12,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:19:12,690 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 15:19:12,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-12-17 15:19:12,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-17 15:19:13,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:19:13,097 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:19:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:19:13,097 INFO L85 PathProgramCache]: Analyzing trace with hash 160572258, now seen corresponding path program 3 times [2021-12-17 15:19:13,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:19:13,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996526066] [2021-12-17 15:19:13,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:19:13,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:19:13,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:19:13,099 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:19:13,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-17 15:19:13,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 15:19:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:19:13,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 15:19:13,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:19:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:19:14,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:19:19,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:19:19,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996526066] [2021-12-17 15:19:19,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996526066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:19:19,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1436494968] [2021-12-17 15:19:19,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:19:19,955 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 15:19:19,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 15:19:19,956 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 15:19:19,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-12-17 15:19:20,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 15:19:20,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:19:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 15:19:20,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:19:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 15:19:24,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:19:34,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1436494968] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:19:34,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:19:34,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 28 [2021-12-17 15:19:34,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557507115] [2021-12-17 15:19:34,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:19:34,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 15:19:34,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:19:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 15:19:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2057, Unknown=1, NotChecked=0, Total=2256 [2021-12-17 15:19:34,258 INFO L87 Difference]: Start difference. First operand 81 states and 106 transitions. Second operand has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-17 15:19:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:19:37,148 INFO L93 Difference]: Finished difference Result 117 states and 159 transitions. [2021-12-17 15:19:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 15:19:37,149 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 44 [2021-12-17 15:19:37,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:19:37,150 INFO L225 Difference]: With dead ends: 117 [2021-12-17 15:19:37,150 INFO L226 Difference]: Without dead ends: 114 [2021-12-17 15:19:37,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=337, Invalid=2968, Unknown=1, NotChecked=0, Total=3306 [2021-12-17 15:19:37,151 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:19:37,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 338 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 15:19:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-17 15:19:37,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2021-12-17 15:19:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 60 states have internal predecessors, (65), 11 states have call successors, (11), 4 states have call predecessors, (11), 16 states have return successors, (40), 22 states have call predecessors, (40), 11 states have call successors, (40) [2021-12-17 15:19:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2021-12-17 15:19:37,156 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 44 [2021-12-17 15:19:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:19:37,156 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2021-12-17 15:19:37,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-17 15:19:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2021-12-17 15:19:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 15:19:37,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:19:37,157 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 15:19:37,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-12-17 15:19:37,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-17 15:19:37,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:19:37,557 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:19:37,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:19:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1999671810, now seen corresponding path program 4 times [2021-12-17 15:19:37,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:19:37,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026455801] [2021-12-17 15:19:37,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:19:37,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:19:37,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:19:37,559 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:19:37,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-17 15:19:37,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:19:37,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:19:37,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-17 15:19:37,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:19:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:19:39,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:19:44,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:19:44,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026455801] [2021-12-17 15:19:44,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026455801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:19:44,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2029185196] [2021-12-17 15:19:44,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:19:44,320 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 15:19:44,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 15:19:44,321 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 15:19:44,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-17 15:19:44,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:19:44,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:19:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 15:19:44,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:20:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:20:01,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:20:16,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2029185196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:20:16,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:20:16,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 31 [2021-12-17 15:20:16,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303346539] [2021-12-17 15:20:16,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:20:16,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 15:20:16,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:20:16,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 15:20:16,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2230, Unknown=9, NotChecked=0, Total=2450 [2021-12-17 15:20:16,590 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand has 31 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-17 15:20:31,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:20:31,205 INFO L93 Difference]: Finished difference Result 126 states and 171 transitions. [2021-12-17 15:20:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 15:20:31,206 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 44 [2021-12-17 15:20:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:20:31,206 INFO L225 Difference]: With dead ends: 126 [2021-12-17 15:20:31,206 INFO L226 Difference]: Without dead ends: 123 [2021-12-17 15:20:31,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=355, Invalid=3176, Unknown=9, NotChecked=0, Total=3540 [2021-12-17 15:20:31,208 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:20:31,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 373 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 651 Invalid, 0 Unknown, 50 Unchecked, 1.3s Time] [2021-12-17 15:20:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-17 15:20:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2021-12-17 15:20:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 11 states have call successors, (11), 4 states have call predecessors, (11), 15 states have return successors, (37), 22 states have call predecessors, (37), 11 states have call successors, (37) [2021-12-17 15:20:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 112 transitions. [2021-12-17 15:20:31,213 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 112 transitions. Word has length 44 [2021-12-17 15:20:31,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:20:31,213 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 112 transitions. [2021-12-17 15:20:31,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-17 15:20:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 112 transitions. [2021-12-17 15:20:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 15:20:31,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:20:31,213 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 15:20:31,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-12-17 15:20:31,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-17 15:20:31,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:20:31,620 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:20:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:20:31,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1945557726, now seen corresponding path program 5 times [2021-12-17 15:20:31,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:20:31,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192270015] [2021-12-17 15:20:31,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:20:31,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:20:31,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:20:31,626 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:20:31,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-17 15:20:31,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 15:20:31,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:20:31,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 15:20:31,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:20:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:20:34,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:20:49,990 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:20:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192270015] [2021-12-17 15:20:49,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192270015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:20:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [948910180] [2021-12-17 15:20:49,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:20:49,990 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 15:20:49,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 15:20:49,991 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 15:20:49,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-17 15:20:50,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 15:20:50,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:20:50,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 15:20:50,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:21:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 15:21:13,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:21:31,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [948910180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:21:31,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:21:31,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 30 [2021-12-17 15:21:31,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900985144] [2021-12-17 15:21:31,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:21:31,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 15:21:31,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:21:31,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 15:21:31,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1788, Unknown=13, NotChecked=0, Total=1980 [2021-12-17 15:21:31,075 INFO L87 Difference]: Start difference. First operand 85 states and 112 transitions. Second operand has 30 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 15:21:46,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:21:46,249 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2021-12-17 15:21:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 15:21:46,251 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 44 [2021-12-17 15:21:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:21:46,252 INFO L225 Difference]: With dead ends: 117 [2021-12-17 15:21:46,252 INFO L226 Difference]: Without dead ends: 114 [2021-12-17 15:21:46,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 60.8s TimeCoverageRelationStatistics Valid=316, Invalid=2426, Unknown=14, NotChecked=0, Total=2756 [2021-12-17 15:21:46,253 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:21:46,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 300 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 278 Invalid, 0 Unknown, 212 Unchecked, 1.2s Time] [2021-12-17 15:21:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-17 15:21:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2021-12-17 15:21:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.098360655737705) internal successors, (67), 62 states have internal predecessors, (67), 11 states have call successors, (11), 4 states have call predecessors, (11), 17 states have return successors, (42), 23 states have call predecessors, (42), 11 states have call successors, (42) [2021-12-17 15:21:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 120 transitions. [2021-12-17 15:21:46,263 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 120 transitions. Word has length 44 [2021-12-17 15:21:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:21:46,263 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 120 transitions. [2021-12-17 15:21:46,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 15:21:46,263 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 120 transitions. [2021-12-17 15:21:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 15:21:46,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:21:46,264 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-17 15:21:46,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-17 15:21:46,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-12-17 15:21:46,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-17 15:21:46,664 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:21:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:21:46,665 INFO L85 PathProgramCache]: Analyzing trace with hash -106458174, now seen corresponding path program 6 times [2021-12-17 15:21:46,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:21:46,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302768357] [2021-12-17 15:21:46,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:21:46,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:21:46,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:21:46,666 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:21:46,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-17 15:21:46,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-17 15:21:46,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:21:46,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 15:21:46,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:21:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 15:21:47,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:21:51,095 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:21:51,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302768357] [2021-12-17 15:21:51,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302768357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:21:51,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1049702075] [2021-12-17 15:21:51,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:21:51,096 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 15:21:51,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 15:21:51,097 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 15:21:51,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-17 15:21:51,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-17 15:21:51,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:21:51,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 15:21:51,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:21:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 15:21:52,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:21:56,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1049702075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:21:56,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:21:56,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 26 [2021-12-17 15:21:56,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338479812] [2021-12-17 15:21:56,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:21:56,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 15:21:56,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:21:56,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 15:21:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 15:21:56,472 INFO L87 Difference]: Start difference. First operand 90 states and 120 transitions. Second operand has 26 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 15:21:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:21:58,410 INFO L93 Difference]: Finished difference Result 126 states and 172 transitions. [2021-12-17 15:21:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 15:21:58,411 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 44 [2021-12-17 15:21:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:21:58,412 INFO L225 Difference]: With dead ends: 126 [2021-12-17 15:21:58,412 INFO L226 Difference]: Without dead ends: 123 [2021-12-17 15:21:58,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 15:21:58,413 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:21:58,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 334 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 15:21:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-17 15:21:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 91. [2021-12-17 15:21:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 11 states have call successors, (11), 4 states have call predecessors, (11), 17 states have return successors, (42), 24 states have call predecessors, (42), 11 states have call successors, (42) [2021-12-17 15:21:58,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2021-12-17 15:21:58,421 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 44 [2021-12-17 15:21:58,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:21:58,422 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 121 transitions. [2021-12-17 15:21:58,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-17 15:21:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 121 transitions. [2021-12-17 15:21:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 15:21:58,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:21:58,423 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 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] [2021-12-17 15:21:58,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-12-17 15:21:58,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-17 15:21:58,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:21:58,834 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:21:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:21:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1649548470, now seen corresponding path program 7 times [2021-12-17 15:21:58,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:21:58,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246294416] [2021-12-17 15:21:58,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:21:58,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:21:58,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:21:58,836 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:21:58,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-17 15:21:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:21:58,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-17 15:21:58,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:22:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 15:22:03,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:22:18,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:22:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246294416] [2021-12-17 15:22:18,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246294416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:22:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [424017812] [2021-12-17 15:22:18,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:22:18,162 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 15:22:18,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 15:22:18,165 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 15:22:18,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-17 15:22:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:22:18,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 15:22:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:22:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 15:22:44,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:22:51,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [424017812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:22:51,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:22:51,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 43 [2021-12-17 15:22:51,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238026657] [2021-12-17 15:22:51,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:22:51,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 15:22:51,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:22:51,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 15:22:51,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=3151, Unknown=12, NotChecked=0, Total=3422 [2021-12-17 15:22:51,622 INFO L87 Difference]: Start difference. First operand 91 states and 121 transitions. Second operand has 43 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 33 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 12 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 15:23:01,421 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 42 DAG size of output: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 15:23:16,066 WARN L227 SmtUtils]: Spent 9.05s on a formula simplification. DAG size of input: 48 DAG size of output: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 15:23:27,370 WARN L227 SmtUtils]: Spent 10.82s on a formula simplification. DAG size of input: 48 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 15:23:45,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:23:45,428 INFO L93 Difference]: Finished difference Result 146 states and 206 transitions. [2021-12-17 15:23:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 15:23:45,428 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 33 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 12 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 52 [2021-12-17 15:23:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:23:45,430 INFO L225 Difference]: With dead ends: 146 [2021-12-17 15:23:45,430 INFO L226 Difference]: Without dead ends: 143 [2021-12-17 15:23:45,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 96.2s TimeCoverageRelationStatistics Valid=541, Invalid=4992, Unknown=17, NotChecked=0, Total=5550 [2021-12-17 15:23:45,432 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:23:45,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 472 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 632 Invalid, 0 Unknown, 200 Unchecked, 2.1s Time] [2021-12-17 15:23:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-17 15:23:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 97. [2021-12-17 15:23:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 11 states have call successors, (11), 4 states have call predecessors, (11), 19 states have return successors, (48), 26 states have call predecessors, (48), 11 states have call successors, (48) [2021-12-17 15:23:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 131 transitions. [2021-12-17 15:23:45,439 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 131 transitions. Word has length 52 [2021-12-17 15:23:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:23:45,440 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 131 transitions. [2021-12-17 15:23:45,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 33 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 12 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 15:23:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 131 transitions. [2021-12-17 15:23:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 15:23:45,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:23:45,440 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:23:45,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-12-17 15:23:45,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-17 15:23:45,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 15:23:45,841 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:23:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:23:45,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1179952470, now seen corresponding path program 8 times [2021-12-17 15:23:45,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:23:45,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666966115] [2021-12-17 15:23:45,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:23:45,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:23:45,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:23:45,843 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:23:45,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-17 15:23:45,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:23:45,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:23:45,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 15:23:45,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:23:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 15:23:47,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:23:55,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:23:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666966115] [2021-12-17 15:23:55,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666966115] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:23:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1234366161] [2021-12-17 15:23:55,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:23:55,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 15:23:55,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 15:23:55,167 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 15:23:55,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-12-17 15:23:55,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:23:55,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:23:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-17 15:23:55,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 15:24:06,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:11,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1234366161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:11,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 15:24:11,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 36 [2021-12-17 15:24:11,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354330547] [2021-12-17 15:24:11,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 15:24:11,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 15:24:11,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 15:24:11,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 15:24:11,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1982, Unknown=3, NotChecked=0, Total=2162 [2021-12-17 15:24:11,824 INFO L87 Difference]: Start difference. First operand 97 states and 131 transitions. Second operand has 36 states, 32 states have (on average 1.65625) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-17 15:24:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:22,663 INFO L93 Difference]: Finished difference Result 157 states and 220 transitions. [2021-12-17 15:24:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 15:24:22,667 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.65625) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) Word has length 52 [2021-12-17 15:24:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:22,668 INFO L225 Difference]: With dead ends: 157 [2021-12-17 15:24:22,668 INFO L226 Difference]: Without dead ends: 154 [2021-12-17 15:24:22,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=410, Invalid=3619, Unknown=3, NotChecked=0, Total=4032 [2021-12-17 15:24:22,669 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:22,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 392 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 15:24:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-17 15:24:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 100. [2021-12-17 15:24:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 11 states have call successors, (11), 4 states have call predecessors, (11), 20 states have return successors, (51), 27 states have call predecessors, (51), 11 states have call successors, (51) [2021-12-17 15:24:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2021-12-17 15:24:22,679 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 52 [2021-12-17 15:24:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:22,679 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2021-12-17 15:24:22,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.65625) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (12), 10 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-17 15:24:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2021-12-17 15:24:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 15:24:22,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:22,681 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:22,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-17 15:24:22,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-12-17 15:24:23,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-17 15:24:23,091 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1347917546, now seen corresponding path program 9 times [2021-12-17 15:24:23,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 15:24:23,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030029616] [2021-12-17 15:24:23,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:24:23,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 15:24:23,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 15:24:23,094 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 15:24:23,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-17 15:24:23,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 15:24:23,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:24:23,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-17 15:24:23,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 15:24:28,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:52,550 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 15:24:52,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030029616] [2021-12-17 15:24:52,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030029616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:52,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [984728178] [2021-12-17 15:24:52,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:24:52,550 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-17 15:24:52,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-17 15:24:52,551 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-17 15:24:52,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-12-17 15:24:52,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 15:24:52,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:24:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 15:24:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... Killed by 15