./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound2.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 e89b4ab54b22145b4041cfb458aca993f2d791ac86940dcd03d48a90a5273393 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 16:19:44,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:19:44,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:19:44,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:19:44,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:19:44,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:19:44,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:19:44,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:19:44,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:19:44,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:19:44,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:19:44,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:19:44,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:19:44,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:19:44,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:19:44,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:19:44,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:19:44,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:19:44,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:19:44,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:19:44,678 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:19:44,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:19:44,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:19:44,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:19:44,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:19:44,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:19:44,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:19:44,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:19:44,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:19:44,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:19:44,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:19:44,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:19:44,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:19:44,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:19:44,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:19:44,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:19:44,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:19:44,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:19:44,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:19:44,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:19:44,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:19:44,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:19:44,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:19:44,735 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:19:44,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:19:44,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:19:44,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:19:44,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:19:44,738 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:19:44,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:19:44,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:19:44,739 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:19:44,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:19:44,740 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:19:44,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:19:44,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:19:44,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:19:44,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:19:44,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:19:44,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:19:44,741 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:19:44,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:19:44,743 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:19:44,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:19:44,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:19:44,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:19:44,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:19:44,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:19:44,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:19:44,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:19:44,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:19:44,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:19:44,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:19:44,745 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:19:44,745 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:19:44,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:19:44,746 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e89b4ab54b22145b4041cfb458aca993f2d791ac86940dcd03d48a90a5273393 [2022-07-13 16:19:45,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:19:45,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:19:45,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:19:45,063 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:19:45,064 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:19:45,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound2.c [2022-07-13 16:19:45,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4210f4129/4ce116ffbe084639af84f7409fd05e02/FLAGae43c914b [2022-07-13 16:19:45,609 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:19:45,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound2.c [2022-07-13 16:19:45,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4210f4129/4ce116ffbe084639af84f7409fd05e02/FLAGae43c914b [2022-07-13 16:19:46,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4210f4129/4ce116ffbe084639af84f7409fd05e02 [2022-07-13 16:19:46,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:19:46,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:19:46,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:19:46,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:19:46,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:19:46,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a807ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46, skipping insertion in model container [2022-07-13 16:19:46,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:19:46,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:19:46,182 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/nla-digbench-scaling/egcd-ll_valuebound2.c[489,502] [2022-07-13 16:19:46,199 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:19:46,206 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:19:46,216 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/nla-digbench-scaling/egcd-ll_valuebound2.c[489,502] [2022-07-13 16:19:46,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:19:46,237 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:19:46,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46 WrapperNode [2022-07-13 16:19:46,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:19:46,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:19:46,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:19:46,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:19:46,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,267 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2022-07-13 16:19:46,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:19:46,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:19:46,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:19:46,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:19:46,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:19:46,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:19:46,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:19:46,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:19:46,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (1/1) ... [2022-07-13 16:19:46,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:19:46,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:19:46,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 16:19:46,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 16:19:46,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:19:46,379 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 16:19:46,380 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 16:19:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:19:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:19:46,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:19:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:19:46,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:19:46,439 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:19:46,441 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:19:46,625 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:19:46,631 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:19:46,647 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 16:19:46,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:19:46 BoogieIcfgContainer [2022-07-13 16:19:46,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:19:46,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:19:46,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:19:46,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:19:46,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:19:46" (1/3) ... [2022-07-13 16:19:46,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c02fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:19:46, skipping insertion in model container [2022-07-13 16:19:46,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:19:46" (2/3) ... [2022-07-13 16:19:46,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c02fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:19:46, skipping insertion in model container [2022-07-13 16:19:46,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:19:46" (3/3) ... [2022-07-13 16:19:46,658 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound2.c [2022-07-13 16:19:46,683 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:19:46,683 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:19:46,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:19:46,761 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@deb1460, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@387e4de5 [2022-07-13 16:19:46,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:19:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 16:19:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 16:19:46,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:19:46,787 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:46,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:19:46,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:19:46,794 INFO L85 PathProgramCache]: Analyzing trace with hash 516392259, now seen corresponding path program 1 times [2022-07-13 16:19:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:19:46,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481721300] [2022-07-13 16:19:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:46,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:19:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:46,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 16:19:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:46,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 16:19:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:47,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 16:19:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:47,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 16:19:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 16:19:47,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:19:47,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481721300] [2022-07-13 16:19:47,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481721300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:19:47,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:19:47,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:19:47,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899868701] [2022-07-13 16:19:47,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:19:47,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:19:47,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:19:47,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:19:47,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:19:47,075 INFO L87 Difference]: Start difference. First operand has 32 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 16:19:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:19:47,105 INFO L93 Difference]: Finished difference Result 61 states and 99 transitions. [2022-07-13 16:19:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:19:47,107 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-07-13 16:19:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:19:47,119 INFO L225 Difference]: With dead ends: 61 [2022-07-13 16:19:47,120 INFO L226 Difference]: Without dead ends: 28 [2022-07-13 16:19:47,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:19:47,133 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 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 [2022-07-13 16:19:47,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:19:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-13 16:19:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-13 16:19:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-13 16:19:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-07-13 16:19:47,187 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 29 [2022-07-13 16:19:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:19:47,191 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-07-13 16:19:47,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 16:19:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-07-13 16:19:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 16:19:47,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:19:47,195 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:47,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 16:19:47,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:19:47,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:19:47,197 INFO L85 PathProgramCache]: Analyzing trace with hash 501437177, now seen corresponding path program 1 times [2022-07-13 16:19:47,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:19:47,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151774919] [2022-07-13 16:19:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:47,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:19:47,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:19:47,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165517799] [2022-07-13 16:19:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:47,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:47,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:19:47,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:19:47,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 16:19:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:47,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 16:19:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:19:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 16:19:47,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:19:47,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:19:47,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151774919] [2022-07-13 16:19:47,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:19:47,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165517799] [2022-07-13 16:19:47,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165517799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:19:47,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:19:47,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:19:47,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360865754] [2022-07-13 16:19:47,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:19:47,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:19:47,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:19:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:19:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:19:47,500 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 16:19:47,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:19:47,576 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2022-07-13 16:19:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:19:47,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-07-13 16:19:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:19:47,578 INFO L225 Difference]: With dead ends: 44 [2022-07-13 16:19:47,578 INFO L226 Difference]: Without dead ends: 42 [2022-07-13 16:19:47,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:19:47,579 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:19:47,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 127 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:19:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-13 16:19:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-07-13 16:19:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-13 16:19:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2022-07-13 16:19:47,589 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 29 [2022-07-13 16:19:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:19:47,590 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2022-07-13 16:19:47,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-13 16:19:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2022-07-13 16:19:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 16:19:47,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:19:47,591 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:47,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 16:19:47,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:47,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:19:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:19:47,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1017640517, now seen corresponding path program 1 times [2022-07-13 16:19:47,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:19:47,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734163966] [2022-07-13 16:19:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:47,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:19:47,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:19:47,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214961579] [2022-07-13 16:19:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:47,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:47,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:19:47,832 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:19:47,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 16:19:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:47,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 16:19:47,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:19:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 16:19:48,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:19:48,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:19:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734163966] [2022-07-13 16:19:48,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:19:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214961579] [2022-07-13 16:19:48,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214961579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:19:48,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:19:48,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 16:19:48,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929869097] [2022-07-13 16:19:48,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:19:48,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 16:19:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:19:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 16:19:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:19:48,165 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 16:19:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:19:48,336 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2022-07-13 16:19:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 16:19:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 34 [2022-07-13 16:19:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:19:48,340 INFO L225 Difference]: With dead ends: 66 [2022-07-13 16:19:48,340 INFO L226 Difference]: Without dead ends: 64 [2022-07-13 16:19:48,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-13 16:19:48,342 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:19:48,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 149 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:19:48,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-13 16:19:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2022-07-13 16:19:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-13 16:19:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2022-07-13 16:19:48,358 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 34 [2022-07-13 16:19:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:19:48,358 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2022-07-13 16:19:48,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 16:19:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2022-07-13 16:19:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 16:19:48,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:19:48,360 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:48,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 16:19:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 16:19:48,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:19:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:19:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1133401081, now seen corresponding path program 1 times [2022-07-13 16:19:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:19:48,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825066773] [2022-07-13 16:19:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:48,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:19:48,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:19:48,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239520462] [2022-07-13 16:19:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:48,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:48,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:19:48,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:19:48,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 16:19:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:48,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 16:19:48,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:19:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 16:19:48,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:19:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:19:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825066773] [2022-07-13 16:19:48,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:19:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239520462] [2022-07-13 16:19:48,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239520462] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 16:19:48,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:19:48,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-07-13 16:19:48,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872495341] [2022-07-13 16:19:48,867 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-13 16:19:48,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 16:19:48,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:19:48,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 16:19:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:19:48,869 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 16:19:49,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:19:49,016 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2022-07-13 16:19:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 16:19:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2022-07-13 16:19:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:19:49,020 INFO L225 Difference]: With dead ends: 64 [2022-07-13 16:19:49,020 INFO L226 Difference]: Without dead ends: 60 [2022-07-13 16:19:49,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-13 16:19:49,023 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:19:49,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 156 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:19:49,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-13 16:19:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-13 16:19:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 32 states have (on average 1.28125) internal successors, (41), 34 states have internal predecessors, (41), 22 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-13 16:19:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2022-07-13 16:19:49,057 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 39 [2022-07-13 16:19:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:19:49,058 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2022-07-13 16:19:49,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 16:19:49,059 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2022-07-13 16:19:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 16:19:49,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:19:49,064 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:49,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 16:19:49,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:49,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:19:49,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:19:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1954831506, now seen corresponding path program 1 times [2022-07-13 16:19:49,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:19:49,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814230902] [2022-07-13 16:19:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:49,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:19:49,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:19:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957504559] [2022-07-13 16:19:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:49,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:49,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:19:49,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:19:49,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 16:19:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:49,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:19:49,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:19:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 16:19:49,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:19:49,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:19:49,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814230902] [2022-07-13 16:19:49,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:19:49,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957504559] [2022-07-13 16:19:49,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957504559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:19:49,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:19:49,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:19:49,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145645079] [2022-07-13 16:19:49,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:19:49,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:19:49,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:19:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:19:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:19:49,383 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-13 16:19:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:19:49,427 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2022-07-13 16:19:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:19:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-07-13 16:19:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:19:49,429 INFO L225 Difference]: With dead ends: 66 [2022-07-13 16:19:49,429 INFO L226 Difference]: Without dead ends: 64 [2022-07-13 16:19:49,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:19:49,430 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:19:49,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:19:49,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-13 16:19:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-13 16:19:49,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 37 states have internal predecessors, (44), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-13 16:19:49,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2022-07-13 16:19:49,440 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 45 [2022-07-13 16:19:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:19:49,440 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2022-07-13 16:19:49,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-13 16:19:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2022-07-13 16:19:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 16:19:49,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:19:49,442 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:49,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 16:19:49,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:49,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:19:49,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:19:49,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1265228631, now seen corresponding path program 1 times [2022-07-13 16:19:49,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:19:49,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755020125] [2022-07-13 16:19:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:49,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:19:49,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:19:49,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588961826] [2022-07-13 16:19:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:49,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:49,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:19:49,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:19:49,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 16:19:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:49,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 16:19:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:19:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-13 16:19:49,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:19:49,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:19:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755020125] [2022-07-13 16:19:49,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:19:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588961826] [2022-07-13 16:19:49,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588961826] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:19:49,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:19:49,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 16:19:49,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264928882] [2022-07-13 16:19:49,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:19:49,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 16:19:49,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:19:49,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 16:19:49,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 16:19:49,836 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 16:19:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:19:49,897 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2022-07-13 16:19:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:19:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-07-13 16:19:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:19:49,898 INFO L225 Difference]: With dead ends: 80 [2022-07-13 16:19:49,898 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 16:19:49,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 16:19:49,899 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:19:49,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 127 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:19:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 16:19:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-07-13 16:19:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-13 16:19:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-07-13 16:19:49,908 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 47 [2022-07-13 16:19:49,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:19:49,909 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-07-13 16:19:49,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 16:19:49,909 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-07-13 16:19:49,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 16:19:49,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:19:49,910 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:49,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 16:19:50,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:50,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:19:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:19:50,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1617953190, now seen corresponding path program 1 times [2022-07-13 16:19:50,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:19:50,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639567076] [2022-07-13 16:19:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:50,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:19:50,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:19:50,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418814822] [2022-07-13 16:19:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:50,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:50,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:19:50,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:19:50,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 16:19:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:50,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 16:19:50,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:19:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 16:19:50,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:19:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 16:19:50,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:19:50,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639567076] [2022-07-13 16:19:50,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:19:50,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418814822] [2022-07-13 16:19:50,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418814822] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:19:50,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:19:50,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-13 16:19:50,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208409212] [2022-07-13 16:19:50,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:19:50,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 16:19:50,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:19:50,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 16:19:50,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-13 16:19:50,335 INFO L87 Difference]: Start difference. First operand 75 states and 98 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-13 16:19:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:19:50,469 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-07-13 16:19:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 16:19:50,471 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-07-13 16:19:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:19:50,472 INFO L225 Difference]: With dead ends: 84 [2022-07-13 16:19:50,472 INFO L226 Difference]: Without dead ends: 80 [2022-07-13 16:19:50,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-13 16:19:50,473 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:19:50,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:19:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-13 16:19:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-07-13 16:19:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-13 16:19:50,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2022-07-13 16:19:50,485 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 50 [2022-07-13 16:19:50,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:19:50,486 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2022-07-13 16:19:50,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-13 16:19:50,486 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2022-07-13 16:19:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 16:19:50,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:19:50,487 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:50,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 16:19:50,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:50,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:19:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:19:50,708 INFO L85 PathProgramCache]: Analyzing trace with hash 860577929, now seen corresponding path program 1 times [2022-07-13 16:19:50,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:19:50,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611557358] [2022-07-13 16:19:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:50,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:19:50,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:19:50,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089534275] [2022-07-13 16:19:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:50,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:50,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:19:50,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:19:50,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 16:19:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:50,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-13 16:19:50,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:19:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 16:19:51,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:19:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-13 16:19:51,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:19:51,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611557358] [2022-07-13 16:19:51,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:19:51,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089534275] [2022-07-13 16:19:51,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089534275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:19:51,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:19:51,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-07-13 16:19:51,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115883408] [2022-07-13 16:19:51,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:19:51,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 16:19:51,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:19:51,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 16:19:51,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-07-13 16:19:51,344 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 16:19:51,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:19:51,880 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2022-07-13 16:19:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 16:19:51,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 52 [2022-07-13 16:19:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:19:51,892 INFO L225 Difference]: With dead ends: 115 [2022-07-13 16:19:51,892 INFO L226 Difference]: Without dead ends: 113 [2022-07-13 16:19:51,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-13 16:19:51,893 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 16:19:51,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 96 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 16:19:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-13 16:19:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2022-07-13 16:19:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 57 states have internal predecessors, (61), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-13 16:19:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2022-07-13 16:19:51,922 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 52 [2022-07-13 16:19:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:19:51,922 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2022-07-13 16:19:51,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 16:19:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2022-07-13 16:19:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-13 16:19:51,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:19:51,923 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:51,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 16:19:52,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:52,132 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:19:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:19:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1226126935, now seen corresponding path program 2 times [2022-07-13 16:19:52,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:19:52,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105352334] [2022-07-13 16:19:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:19:52,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:19:52,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260217762] [2022-07-13 16:19:52,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 16:19:52,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:19:52,144 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:19:52,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 16:19:52,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 16:19:52,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 16:19:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 16:19:52,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:19:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 16:19:52,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:19:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-13 16:19:52,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:19:52,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105352334] [2022-07-13 16:19:52,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:19:52,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260217762] [2022-07-13 16:19:52,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260217762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:19:52,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:19:52,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-07-13 16:19:52,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053635828] [2022-07-13 16:19:52,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:19:52,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 16:19:52,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:19:52,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 16:19:52,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-13 16:19:52,989 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 19 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2022-07-13 16:19:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:19:53,637 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2022-07-13 16:19:53,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 16:19:53,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) Word has length 57 [2022-07-13 16:19:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:19:53,639 INFO L225 Difference]: With dead ends: 160 [2022-07-13 16:19:53,639 INFO L226 Difference]: Without dead ends: 82 [2022-07-13 16:19:53,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-07-13 16:19:53,640 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 16:19:53,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 95 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 16:19:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-13 16:19:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-07-13 16:19:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 53 states have internal predecessors, (55), 18 states have call successors, (18), 12 states have call predecessors, (18), 12 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-13 16:19:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-07-13 16:19:53,651 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 57 [2022-07-13 16:19:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:19:53,652 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-07-13 16:19:53,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 9 states have call predecessors, (17), 7 states have call successors, (17) [2022-07-13 16:19:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-07-13 16:19:53,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 16:19:53,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:19:53,653 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:53,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-13 16:19:53,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 16:19:53,876 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:19:53,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:19:53,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1236716699, now seen corresponding path program 1 times [2022-07-13 16:19:53,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:19:53,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583967416] [2022-07-13 16:19:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:53,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:19:53,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:19:53,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335755877] [2022-07-13 16:19:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:19:53,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:19:53,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:19:53,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 16:19:53,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 16:19:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:19:53,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 16:19:53,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:19:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-13 16:19:54,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:19:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-13 16:19:54,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:19:54,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583967416] [2022-07-13 16:19:54,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:19:54,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335755877] [2022-07-13 16:19:54,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335755877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:19:54,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:19:54,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-07-13 16:19:54,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811673195] [2022-07-13 16:19:54,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:19:54,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 16:19:54,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:19:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 16:19:54,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-13 16:19:54,141 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-13 16:19:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:19:54,242 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-07-13 16:19:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 16:19:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 65 [2022-07-13 16:19:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:19:54,243 INFO L225 Difference]: With dead ends: 86 [2022-07-13 16:19:54,243 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 16:19:54,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-07-13 16:19:54,244 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:19:54,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:19:54,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 16:19:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 16:19:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 16:19:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 16:19:54,245 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2022-07-13 16:19:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:19:54,245 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 16:19:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-13 16:19:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 16:19:54,245 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 16:19:54,248 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 16:19:54,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 16:19:54,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 16:19:54,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-13 16:19:56,399 INFO L895 garLoopResultBuilder]: At program point L35-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse1 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (.cse2 (= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~a~0#1|)) (.cse3 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and (<= |ULTIMATE.start_main_~y~0#1| 2) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0 (= (+ |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) 0) .cse1 .cse2 (= (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~s~0#1|) 1) .cse3) (and (= |ULTIMATE.start_main_~p~0#1| 1) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) .cse0 .cse1 .cse2 (<= |ULTIMATE.start_main_~x~0#1| 2) .cse3))) [2022-07-13 16:19:56,399 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-13 16:19:56,400 INFO L902 garLoopResultBuilder]: At program point L58(lines 18 59) the Hoare annotation is: true [2022-07-13 16:19:56,400 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2022-07-13 16:19:56,400 INFO L895 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse3 (<= |ULTIMATE.start_main_~x~0#1| 2))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) .cse2 .cse3 (= |ULTIMATE.start_main_~s~0#1| 1)) (and .cse0 .cse1 (= (+ (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~b~0#1|) .cse2 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~a~0#1|) .cse3))) [2022-07-13 16:19:56,400 INFO L895 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse1 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (.cse2 (= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~a~0#1|)) (.cse3 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and (<= |ULTIMATE.start_main_~y~0#1| 2) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0 (= (+ |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) 0) .cse1 .cse2 (= (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~s~0#1|) 1) .cse3) (and (= |ULTIMATE.start_main_~p~0#1| 1) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) .cse0 .cse1 .cse2 (<= |ULTIMATE.start_main_~x~0#1| 2) .cse3))) [2022-07-13 16:19:56,400 INFO L899 garLoopResultBuilder]: For program point L38(lines 35 52) no Hoare annotation was computed. [2022-07-13 16:19:56,400 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse3 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse4 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~a~0#1|)) (.cse8 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse9 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9) (and (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse0 (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse3 (<= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) .cse5 (= (+ |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) 0) .cse6 .cse7 (= (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~s~0#1|) 1)) (and (= |ULTIMATE.start_main_~p~0#1| 1) .cse1 (< |ULTIMATE.start_main_~b~0#1| 2) .cse2 .cse4 (< 0 |ULTIMATE.start_main_~a~0#1|) .cse5 .cse7 .cse8 .cse9))) [2022-07-13 16:19:56,400 INFO L895 garLoopResultBuilder]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse3 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse4 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~a~0#1|)) (.cse8 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse9 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9) (and (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse0 (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse3 (<= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) .cse5 (= (+ |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) 0) .cse6 .cse7 (= (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~s~0#1|) 1)) (and (= |ULTIMATE.start_main_~p~0#1| 1) .cse1 (< |ULTIMATE.start_main_~b~0#1| 2) .cse2 .cse4 (< 0 |ULTIMATE.start_main_~a~0#1|) .cse5 .cse7 .cse8 .cse9))) [2022-07-13 16:19:56,400 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-13 16:19:56,400 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-13 16:19:56,401 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-13 16:19:56,401 INFO L899 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2022-07-13 16:19:56,401 INFO L899 garLoopResultBuilder]: For program point L57(line 57) no Hoare annotation was computed. [2022-07-13 16:19:56,401 INFO L895 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2022-07-13 16:19:56,401 INFO L895 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2022-07-13 16:19:56,401 INFO L895 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse1 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse2 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~q~0#1| 0) .cse1 (<= |ULTIMATE.start_main_~x~0#1| 2) .cse2) (and .cse0 (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) .cse1 (= (+ |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) 0) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~a~0#1|) (= (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~s~0#1|) 1) .cse2))) [2022-07-13 16:19:56,401 INFO L902 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-07-13 16:19:56,401 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-07-13 16:19:56,401 INFO L899 garLoopResultBuilder]: For program point L43(lines 43 51) no Hoare annotation was computed. [2022-07-13 16:19:56,402 INFO L895 garLoopResultBuilder]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse3 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse4 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse7 (= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~a~0#1|)) (.cse8 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse9 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9) (and (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse0 (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse3 (<= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) .cse5 (= (+ |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) 0) .cse6 .cse7 (= (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~s~0#1|) 1)) (and (= |ULTIMATE.start_main_~p~0#1| 1) .cse1 (< |ULTIMATE.start_main_~b~0#1| 2) .cse2 .cse4 (< 0 |ULTIMATE.start_main_~a~0#1|) .cse5 .cse7 .cse8 .cse9))) [2022-07-13 16:19:56,402 INFO L895 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse2 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse5 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse3 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse4 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (= (+ (* |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~a~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse8 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse0 (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse2 (<= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) .cse4 (= (+ |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) 0) .cse5 .cse6 (= (+ |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~s~0#1|) 1)) (and (= |ULTIMATE.start_main_~p~0#1| 1) .cse1 (< |ULTIMATE.start_main_~b~0#1| 2) (= (+ (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~x~0#1|)) |ULTIMATE.start_main_~b~0#1|) .cse3 (< 0 |ULTIMATE.start_main_~a~0#1|) .cse4 .cse6 .cse7 .cse8))) [2022-07-13 16:19:56,402 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-07-13 16:19:56,402 INFO L899 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2022-07-13 16:19:56,402 INFO L899 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2022-07-13 16:19:56,402 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2022-07-13 16:19:56,402 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-07-13 16:19:56,403 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2022-07-13 16:19:56,403 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2022-07-13 16:19:56,403 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2022-07-13 16:19:56,403 INFO L899 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2022-07-13 16:19:56,403 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-07-13 16:19:56,406 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:19:56,408 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 16:19:56,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 04:19:56 BoogieIcfgContainer [2022-07-13 16:19:56,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 16:19:56,423 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 16:19:56,423 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 16:19:56,423 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 16:19:56,424 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:19:46" (3/4) ... [2022-07-13 16:19:56,426 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 16:19:56,432 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-07-13 16:19:56,432 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-07-13 16:19:56,435 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-07-13 16:19:56,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-13 16:19:56,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 16:19:56,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 16:19:56,467 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 16:19:56,467 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 16:19:56,468 INFO L158 Benchmark]: Toolchain (without parser) took 10459.87ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 59.3MB in the beginning and 38.6MB in the end (delta: 20.8MB). Peak memory consumption was 65.2MB. Max. memory is 16.1GB. [2022-07-13 16:19:56,468 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 90.2MB. Free memory was 46.6MB in the beginning and 46.6MB in the end (delta: 30.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 16:19:56,469 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.18ms. Allocated memory is still 90.2MB. Free memory was 59.2MB in the beginning and 66.0MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 16:19:56,469 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.42ms. Allocated memory is still 90.2MB. Free memory was 66.0MB in the beginning and 64.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 16:19:56,469 INFO L158 Benchmark]: Boogie Preprocessor took 19.17ms. Allocated memory is still 90.2MB. Free memory was 64.4MB in the beginning and 63.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 16:19:56,470 INFO L158 Benchmark]: RCFGBuilder took 361.48ms. Allocated memory is still 90.2MB. Free memory was 63.3MB in the beginning and 53.5MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 16:19:56,470 INFO L158 Benchmark]: TraceAbstraction took 9771.20ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 53.1MB in the beginning and 41.7MB in the end (delta: 11.3MB). Peak memory consumption was 57.7MB. Max. memory is 16.1GB. [2022-07-13 16:19:56,470 INFO L158 Benchmark]: Witness Printer took 44.53ms. Allocated memory is still 134.2MB. Free memory was 41.7MB in the beginning and 38.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-13 16:19:56,472 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 90.2MB. Free memory was 46.6MB in the beginning and 46.6MB in the end (delta: 30.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.18ms. Allocated memory is still 90.2MB. Free memory was 59.2MB in the beginning and 66.0MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.42ms. Allocated memory is still 90.2MB. Free memory was 66.0MB in the beginning and 64.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.17ms. Allocated memory is still 90.2MB. Free memory was 64.4MB in the beginning and 63.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 361.48ms. Allocated memory is still 90.2MB. Free memory was 63.3MB in the beginning and 53.5MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 9771.20ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 53.1MB in the beginning and 41.7MB in the end (delta: 11.3MB). Peak memory consumption was 57.7MB. Max. memory is 16.1GB. * Witness Printer took 44.53ms. Allocated memory is still 134.2MB. Free memory was 41.7MB in the beginning and 38.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.7s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 236 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 189 mSDsluCounter, 1148 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 825 mSDsCounter, 248 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1480 IncrementalHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 248 mSolverCounterUnsat, 323 mSDtfsCounter, 1480 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 672 GetRequests, 566 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=8, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 32 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 68 PreInvPairs, 93 NumberOfFragments, 798 HoareAnnotationTreeSize, 68 FomulaSimplifications, 222 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 1996 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 447 NumberOfCodeBlocks, 447 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 657 ConstructedInterpolants, 0 QuantifiedInterpolants, 2348 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1102 ConjunctsInSsa, 176 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 706/790 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((y <= 2 && 1 <= y) && b == y) && r == 0) && q == 0) && 1 <= x) && a == x) && r * y + p * x == a) && x <= 2) && s == 1) || (((((((((y == a + b && y <= 2) && !(a == y)) && r == 0) && a <= y) && 1 <= x) && p + q == 0) && a == x) && r * y + p * x == a) && r + s == 1)) || (((((((((p == 1 && 1 <= y) && b < 2) && b == y) && q == 0) && 0 < a) && 1 <= x) && r * y + p * x == a) && x <= 2) && s == 1) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-13 16:19:56,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE