./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.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 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:54:24,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:54:24,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:54:24,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:54:24,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:54:24,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:54:24,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:54:24,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:54:24,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:54:24,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:54:24,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:54:24,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:54:24,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:54:24,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:54:24,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:54:24,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:54:24,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:54:24,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:54:24,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:54:24,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:54:24,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:54:24,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:54:24,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:54:24,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:54:24,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:54:24,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:54:24,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:54:24,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:54:24,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:54:24,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:54:24,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:54:24,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:54:24,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:54:24,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:54:24,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:54:24,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:54:24,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:54:24,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:54:24,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:54:24,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:54:24,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:54:24,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 11:54:24,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:54:24,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:54:24,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:54:24,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:54:24,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:54:24,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:54:24,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:54:24,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:54:24,473 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:54:24,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:54:24,474 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:54:24,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 11:54:24,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:54:24,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:54:24,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:54:24,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:54:24,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:54:24,475 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:54:24,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:54:24,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:54:24,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:54:24,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:54:24,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:54:24,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:54:24,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:54:24,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:54:24,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:54:24,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:54:24,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 11:54:24,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 11:54:24,477 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:54:24,477 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:54:24,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:54:24,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:54:24,478 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 [2021-12-17 11:54:24,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:54:24,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:54:24,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:54:24,757 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:54:24,758 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:54:24,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-12-17 11:54:24,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de636f4a7/99fa35a37f1a4959822b0b7e487cab03/FLAG9c06f19cb [2021-12-17 11:54:25,136 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:54:25,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-12-17 11:54:25,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de636f4a7/99fa35a37f1a4959822b0b7e487cab03/FLAG9c06f19cb [2021-12-17 11:54:25,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de636f4a7/99fa35a37f1a4959822b0b7e487cab03 [2021-12-17 11:54:25,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:54:25,561 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:54:25,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:54:25,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:54:25,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:54:25,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8cd2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25, skipping insertion in model container [2021-12-17 11:54:25,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:54:25,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:54:25,747 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_valuebound20.c[489,502] [2021-12-17 11:54:25,774 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:54:25,784 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:54:25,794 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_valuebound20.c[489,502] [2021-12-17 11:54:25,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:54:25,825 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:54:25,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25 WrapperNode [2021-12-17 11:54:25,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:54:25,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:54:25,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:54:25,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:54:25,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,856 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2021-12-17 11:54:25,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:54:25,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:54:25,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:54:25,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:54:25,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:54:25,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:54:25,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:54:25,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:54:25,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (1/1) ... [2021-12-17 11:54:25,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:54:25,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:54:25,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 11:54:25,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 11:54:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:54:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 11:54:25,962 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 11:54:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 11:54:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:54:25,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:54:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:54:25,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:54:26,009 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:54:26,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:54:26,140 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:54:26,149 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:54:26,163 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 11:54:26,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:54:26 BoogieIcfgContainer [2021-12-17 11:54:26,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:54:26,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:54:26,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:54:26,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:54:26,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:54:25" (1/3) ... [2021-12-17 11:54:26,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f22a8e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:54:26, skipping insertion in model container [2021-12-17 11:54:26,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:54:25" (2/3) ... [2021-12-17 11:54:26,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f22a8e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:54:26, skipping insertion in model container [2021-12-17 11:54:26,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:54:26" (3/3) ... [2021-12-17 11:54:26,172 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.c [2021-12-17 11:54:26,176 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:54:26,178 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:54:26,244 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:54:26,249 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 11:54:26,251 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:54:26,264 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) [2021-12-17 11:54:26,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 11:54:26,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:54:26,269 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:54:26,270 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:54:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:54:26,278 INFO L85 PathProgramCache]: Analyzing trace with hash 516392259, now seen corresponding path program 1 times [2021-12-17 11:54:26,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:54:26,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206124207] [2021-12-17 11:54:26,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:26,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:54:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:26,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 11:54:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 11:54:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:26,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 11:54:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:26,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 11:54:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 11:54:26,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:54:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206124207] [2021-12-17 11:54:26,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206124207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:54:26,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:54:26,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 11:54:26,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855738786] [2021-12-17 11:54:26,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:54:26,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 11:54:26,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:54:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 11:54:26,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:54:26,505 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) [2021-12-17 11:54:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:54:26,526 INFO L93 Difference]: Finished difference Result 61 states and 99 transitions. [2021-12-17 11:54:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 11:54:26,528 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 [2021-12-17 11:54:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:54:26,533 INFO L225 Difference]: With dead ends: 61 [2021-12-17 11:54:26,534 INFO L226 Difference]: Without dead ends: 28 [2021-12-17 11:54:26,537 INFO L932 BasicCegarLoop]: 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 [2021-12-17 11:54:26,543 INFO L933 BasicCegarLoop]: 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 [2021-12-17 11:54:26,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:54:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-17 11:54:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-17 11:54:26,578 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) [2021-12-17 11:54:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2021-12-17 11:54:26,583 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 29 [2021-12-17 11:54:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:54:26,585 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2021-12-17 11:54:26,585 INFO L471 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) [2021-12-17 11:54:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2021-12-17 11:54:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 11:54:26,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:54:26,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:54:26,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 11:54:26,589 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:54:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:54:26,591 INFO L85 PathProgramCache]: Analyzing trace with hash 501437177, now seen corresponding path program 1 times [2021-12-17 11:54:26,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:54:26,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010913191] [2021-12-17 11:54:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:26,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:54:26,610 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:54:26,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686171199] [2021-12-17 11:54:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:26,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:26,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:54:26,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:54:26,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 11:54:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:26,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 11:54:26,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:54:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 11:54:26,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:54:26,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:54:26,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010913191] [2021-12-17 11:54:26,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:54:26,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686171199] [2021-12-17 11:54:26,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686171199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:54:26,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:54:26,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:54:26,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552684283] [2021-12-17 11:54:26,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:54:26,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:54:26,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:54:26,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:54:26,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:54:26,872 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) [2021-12-17 11:54:26,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:54:26,952 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2021-12-17 11:54:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:54:26,953 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 [2021-12-17 11:54:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:54:26,954 INFO L225 Difference]: With dead ends: 44 [2021-12-17 11:54:26,954 INFO L226 Difference]: Without dead ends: 42 [2021-12-17 11:54:26,954 INFO L932 BasicCegarLoop]: 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 [2021-12-17 11:54:26,955 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:54:26,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:54:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-17 11:54:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-12-17 11:54:26,962 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) [2021-12-17 11:54:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2021-12-17 11:54:26,963 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 29 [2021-12-17 11:54:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:54:26,964 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2021-12-17 11:54:26,964 INFO L471 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) [2021-12-17 11:54:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2021-12-17 11:54:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 11:54:26,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:54:26,965 INFO L514 BasicCegarLoop]: 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] [2021-12-17 11:54:26,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 11:54:27,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:27,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:54:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:54:27,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1017640517, now seen corresponding path program 1 times [2021-12-17 11:54:27,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:54:27,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599444432] [2021-12-17 11:54:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:27,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:54:27,190 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:54:27,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984907513] [2021-12-17 11:54:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:27,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:27,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:54:27,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:54:27,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 11:54:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:27,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 11:54:27,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:54:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 11:54:27,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:54:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 11:54:27,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:54:27,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599444432] [2021-12-17 11:54:27,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:54:27,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984907513] [2021-12-17 11:54:27,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984907513] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 11:54:27,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:54:27,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-17 11:54:27,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41201290] [2021-12-17 11:54:27,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:54:27,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:54:27,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:54:27,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:54:27,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:54:27,478 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 11:54:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:54:27,536 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2021-12-17 11:54:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:54:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-12-17 11:54:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:54:27,544 INFO L225 Difference]: With dead ends: 48 [2021-12-17 11:54:27,544 INFO L226 Difference]: Without dead ends: 46 [2021-12-17 11:54:27,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:54:27,548 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:54:27,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 139 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:54:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-17 11:54:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-17 11:54:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 11:54:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2021-12-17 11:54:27,559 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 34 [2021-12-17 11:54:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:54:27,559 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2021-12-17 11:54:27,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 11:54:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2021-12-17 11:54:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 11:54:27,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:54:27,561 INFO L514 BasicCegarLoop]: 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] [2021-12-17 11:54:27,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 11:54:27,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 11:54:27,779 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:54:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:54:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1133401081, now seen corresponding path program 1 times [2021-12-17 11:54:27,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:54:27,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520458206] [2021-12-17 11:54:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:27,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:54:27,789 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:54:27,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022062274] [2021-12-17 11:54:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:27,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:27,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:54:27,804 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:54:27,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 11:54:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 11:54:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:54:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 11:54:28,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:54:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 11:54:28,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:54:28,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520458206] [2021-12-17 11:54:28,136 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:54:28,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022062274] [2021-12-17 11:54:28,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022062274] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 11:54:28,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:54:28,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-17 11:54:28,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800715401] [2021-12-17 11:54:28,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:54:28,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:54:28,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:54:28,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:54:28,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:54:28,139 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 11:54:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:54:28,186 INFO L93 Difference]: Finished difference Result 70 states and 101 transitions. [2021-12-17 11:54:28,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:54:28,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-12-17 11:54:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:54:28,189 INFO L225 Difference]: With dead ends: 70 [2021-12-17 11:54:28,189 INFO L226 Difference]: Without dead ends: 66 [2021-12-17 11:54:28,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:54:28,190 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:54:28,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:54:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-17 11:54:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-17 11:54:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 28 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 11:54:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2021-12-17 11:54:28,203 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 39 [2021-12-17 11:54:28,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:54:28,203 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2021-12-17 11:54:28,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 11:54:28,203 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2021-12-17 11:54:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 11:54:28,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:54:28,208 INFO L514 BasicCegarLoop]: 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] [2021-12-17 11:54:28,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 11:54:28,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:28,438 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:54:28,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:54:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1954831506, now seen corresponding path program 1 times [2021-12-17 11:54:28,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:54:28,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016726820] [2021-12-17 11:54:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:28,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:54:28,447 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:54:28,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227003893] [2021-12-17 11:54:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:28,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:28,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:54:28,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:54:28,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 11:54:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:28,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 11:54:28,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:54:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 11:54:28,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:54:28,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:54:28,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016726820] [2021-12-17 11:54:28,575 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:54:28,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227003893] [2021-12-17 11:54:28,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227003893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:54:28,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:54:28,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:54:28,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757052584] [2021-12-17 11:54:28,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:54:28,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:54:28,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:54:28,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:54:28,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:54:28,577 INFO L87 Difference]: Start difference. First operand 66 states and 94 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) [2021-12-17 11:54:28,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:54:28,605 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2021-12-17 11:54:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:54:28,606 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 [2021-12-17 11:54:28,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:54:28,607 INFO L225 Difference]: With dead ends: 72 [2021-12-17 11:54:28,607 INFO L226 Difference]: Without dead ends: 70 [2021-12-17 11:54:28,608 INFO L932 BasicCegarLoop]: 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 [2021-12-17 11:54:28,608 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:54:28,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 131 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:54:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-17 11:54:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-17 11:54:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 28 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 11:54:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 97 transitions. [2021-12-17 11:54:28,618 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 97 transitions. Word has length 45 [2021-12-17 11:54:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:54:28,618 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 97 transitions. [2021-12-17 11:54:28,618 INFO L471 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) [2021-12-17 11:54:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 97 transitions. [2021-12-17 11:54:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 11:54:28,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:54:28,619 INFO L514 BasicCegarLoop]: 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] [2021-12-17 11:54:28,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 11:54:28,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:28,827 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:54:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:54:28,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1322486933, now seen corresponding path program 1 times [2021-12-17 11:54:28,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:54:28,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995081668] [2021-12-17 11:54:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:28,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:54:28,852 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:54:28,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083980667] [2021-12-17 11:54:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:28,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:28,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:54:28,858 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:54:28,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 11:54:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:28,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 11:54:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:54:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 11:54:29,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:54:29,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:54:29,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995081668] [2021-12-17 11:54:29,005 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:54:29,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083980667] [2021-12-17 11:54:29,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083980667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:54:29,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:54:29,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:54:29,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59895681] [2021-12-17 11:54:29,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:54:29,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:54:29,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:54:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:54:29,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:54:29,006 INFO L87 Difference]: Start difference. First operand 70 states and 97 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) [2021-12-17 11:54:29,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:54:29,038 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2021-12-17 11:54:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:54:29,038 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 [2021-12-17 11:54:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:54:29,039 INFO L225 Difference]: With dead ends: 80 [2021-12-17 11:54:29,039 INFO L226 Difference]: Without dead ends: 77 [2021-12-17 11:54:29,040 INFO L932 BasicCegarLoop]: 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 [2021-12-17 11:54:29,041 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:54:29,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 142 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:54:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-17 11:54:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-12-17 11:54:29,048 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) [2021-12-17 11:54:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-12-17 11:54:29,049 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 47 [2021-12-17 11:54:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:54:29,050 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-12-17 11:54:29,050 INFO L471 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) [2021-12-17 11:54:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-12-17 11:54:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 11:54:29,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:54:29,051 INFO L514 BasicCegarLoop]: 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] [2021-12-17 11:54:29,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 11:54:29,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:29,269 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:54:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:54:29,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1617953190, now seen corresponding path program 1 times [2021-12-17 11:54:29,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:54:29,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939740290] [2021-12-17 11:54:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:29,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:54:29,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:54:29,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301077073] [2021-12-17 11:54:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:29,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:29,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:54:29,298 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:54:29,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 11:54:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 11:54:29,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:54:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 11:54:29,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:54:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 11:54:29,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:54:29,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939740290] [2021-12-17 11:54:29,541 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:54:29,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301077073] [2021-12-17 11:54:29,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301077073] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:54:29,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:54:29,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-17 11:54:29,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156716985] [2021-12-17 11:54:29,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:54:29,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 11:54:29,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:54:29,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 11:54:29,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:54:29,543 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) [2021-12-17 11:54:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:54:29,629 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-12-17 11:54:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 11:54:29,629 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 [2021-12-17 11:54:29,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:54:29,631 INFO L225 Difference]: With dead ends: 84 [2021-12-17 11:54:29,631 INFO L226 Difference]: Without dead ends: 80 [2021-12-17 11:54:29,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:54:29,632 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:54:29,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 150 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:54:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-17 11:54:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-17 11:54:29,639 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) [2021-12-17 11:54:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2021-12-17 11:54:29,640 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 50 [2021-12-17 11:54:29,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:54:29,640 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2021-12-17 11:54:29,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (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) [2021-12-17 11:54:29,640 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2021-12-17 11:54:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 11:54:29,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:54:29,641 INFO L514 BasicCegarLoop]: 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] [2021-12-17 11:54:29,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 11:54:29,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:29,845 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:54:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:54:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash 860577929, now seen corresponding path program 2 times [2021-12-17 11:54:29,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:54:29,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371847470] [2021-12-17 11:54:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:29,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:54:29,860 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:54:29,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758201134] [2021-12-17 11:54:29,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:54:29,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:29,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:54:29,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:54:29,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 11:54:29,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:54:29,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:54:29,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 11:54:29,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:54:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-17 11:54:30,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:54:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-17 11:54:30,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:54:30,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371847470] [2021-12-17 11:54:30,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:54:30,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758201134] [2021-12-17 11:54:30,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758201134] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:54:30,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:54:30,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-17 11:54:30,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126266124] [2021-12-17 11:54:30,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:54:30,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 11:54:30,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:54:30,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 11:54:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:54:30,230 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-17 11:54:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:54:30,556 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2021-12-17 11:54:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:54:30,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 52 [2021-12-17 11:54:30,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:54:30,559 INFO L225 Difference]: With dead ends: 106 [2021-12-17 11:54:30,559 INFO L226 Difference]: Without dead ends: 99 [2021-12-17 11:54:30,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-17 11:54:30,560 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 11:54:30,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 218 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 11:54:30,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-17 11:54:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2021-12-17 11:54:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 11:54:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2021-12-17 11:54:30,575 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 52 [2021-12-17 11:54:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:54:30,575 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2021-12-17 11:54:30,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-17 11:54:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2021-12-17 11:54:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 11:54:30,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:54:30,577 INFO L514 BasicCegarLoop]: 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] [2021-12-17 11:54:30,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 11:54:30,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:30,790 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:54:30,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:54:30,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1236716699, now seen corresponding path program 1 times [2021-12-17 11:54:30,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:54:30,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534067794] [2021-12-17 11:54:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:30,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:54:30,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:54:30,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136287997] [2021-12-17 11:54:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:54:30,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:54:30,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:54:30,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:54:30,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 11:54:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:54:30,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 11:54:30,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:54:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 11:54:31,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:54:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-17 11:54:31,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:54:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534067794] [2021-12-17 11:54:31,309 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:54:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136287997] [2021-12-17 11:54:31,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136287997] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 11:54:31,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:54:31,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2021-12-17 11:54:31,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819280301] [2021-12-17 11:54:31,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:54:31,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:54:31,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:54:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:54:31,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 11:54:31,314 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-12-17 11:54:31,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:54:31,357 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2021-12-17 11:54:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:54:31,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 65 [2021-12-17 11:54:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:54:31,358 INFO L225 Difference]: With dead ends: 84 [2021-12-17 11:54:31,358 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 11:54:31,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-17 11:54:31,359 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:54:31,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 102 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:54:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 11:54:31,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 11:54:31,360 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) [2021-12-17 11:54:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 11:54:31,360 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2021-12-17 11:54:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:54:31,360 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 11:54:31,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2021-12-17 11:54:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 11:54:31,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 11:54:31,362 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 11:54:31,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 11:54:31,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 11:54:31,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 11:54:33,324 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= (+ .cse0 .cse1) |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-17 11:54:33,325 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 11:54:33,325 INFO L861 garLoopResultBuilder]: At program point L58(lines 18 59) the Hoare annotation is: true [2021-12-17 11:54:33,325 INFO L861 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2021-12-17 11:54:33,325 INFO L854 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|))) [2021-12-17 11:54:33,325 INFO L854 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= (+ .cse0 .cse1) |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-17 11:54:33,325 INFO L858 garLoopResultBuilder]: For program point L38(lines 35 52) no Hoare annotation was computed. [2021-12-17 11:54:33,325 INFO L854 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~a~0#1| (+ .cse0 .cse1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-17 11:54:33,325 INFO L854 garLoopResultBuilder]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~a~0#1| (+ .cse0 .cse1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-17 11:54:33,326 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 11:54:33,326 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 11:54:33,326 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 11:54:33,326 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-12-17 11:54:33,326 INFO L858 garLoopResultBuilder]: For program point L57(line 57) no Hoare annotation was computed. [2021-12-17 11:54:33,326 INFO L861 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2021-12-17 11:54:33,326 INFO L861 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: true [2021-12-17 11:54:33,326 INFO L854 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse7 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse8 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)) (.cse6 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|))) (let ((.cse1 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse2 (= |ULTIMATE.start_main_~b~0#1| (+ .cse5 .cse6))) (.cse3 (= |ULTIMATE.start_main_~s~0#1| 1)) (.cse4 (+ .cse7 .cse8)) (.cse0 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~q~0#1| 0) .cse2 .cse3) (and (= |ULTIMATE.start_main_~a~0#1| .cse4) .cse1 (= |ULTIMATE.start_main_~r~0#1| 0) .cse2 .cse3) (and (= .cse4 |ULTIMATE.start_main_~b~0#1|) (= (+ .cse5 .cse6 |ULTIMATE.start_main_~a~0#1|) (+ .cse7 |ULTIMATE.start_main_~b~0#1| .cse8)) .cse0 (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))))) [2021-12-17 11:54:33,326 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2021-12-17 11:54:33,326 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-12-17 11:54:33,326 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 51) no Hoare annotation was computed. [2021-12-17 11:54:33,326 INFO L854 garLoopResultBuilder]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~a~0#1| (+ .cse0 .cse1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-17 11:54:33,326 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (and (= |ULTIMATE.start_main_~a~0#1| (+ .cse0 .cse1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~a~0#1|) (+ .cse0 |ULTIMATE.start_main_~b~0#1| .cse1)) (= (+ (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|) 1) (* |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~p~0#1|)))) [2021-12-17 11:54:33,326 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-12-17 11:54:33,327 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-17 11:54:33,327 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-12-17 11:54:33,327 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-12-17 11:54:33,327 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-12-17 11:54:33,327 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-12-17 11:54:33,327 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-12-17 11:54:33,327 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-12-17 11:54:33,327 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-12-17 11:54:33,327 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-12-17 11:54:33,329 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:54:33,330 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 11:54:33,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 11:54:33 BoogieIcfgContainer [2021-12-17 11:54:33,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 11:54:33,351 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 11:54:33,351 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 11:54:33,351 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 11:54:33,351 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:54:26" (3/4) ... [2021-12-17 11:54:33,353 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 11:54:33,357 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-17 11:54:33,357 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-17 11:54:33,360 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-17 11:54:33,376 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 11:54:33,376 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 11:54:33,376 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 11:54:33,428 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 11:54:33,428 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 11:54:33,429 INFO L158 Benchmark]: Toolchain (without parser) took 7867.64ms. Allocated memory was 75.5MB in the beginning and 111.1MB in the end (delta: 35.7MB). Free memory was 42.8MB in the beginning and 62.1MB in the end (delta: -19.3MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2021-12-17 11:54:33,429 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 75.5MB. Free memory was 54.2MB in the beginning and 54.1MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:54:33,430 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.12ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 42.7MB in the beginning and 68.8MB in the end (delta: -26.0MB). Peak memory consumption was 3.6MB. Max. memory is 16.1GB. [2021-12-17 11:54:33,430 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.12ms. Allocated memory is still 92.3MB. Free memory was 68.8MB in the beginning and 67.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:54:33,430 INFO L158 Benchmark]: Boogie Preprocessor took 33.57ms. Allocated memory is still 92.3MB. Free memory was 67.3MB in the beginning and 66.4MB in the end (delta: 951.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:54:33,430 INFO L158 Benchmark]: RCFGBuilder took 272.76ms. Allocated memory is still 92.3MB. Free memory was 66.1MB in the beginning and 56.7MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 11:54:33,431 INFO L158 Benchmark]: TraceAbstraction took 7183.94ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 56.2MB in the beginning and 65.3MB in the end (delta: -9.1MB). Peak memory consumption was 42.9MB. Max. memory is 16.1GB. [2021-12-17 11:54:33,431 INFO L158 Benchmark]: Witness Printer took 77.72ms. Allocated memory is still 111.1MB. Free memory was 65.3MB in the beginning and 62.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:54:33,433 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 75.5MB. Free memory was 54.2MB in the beginning and 54.1MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.12ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 42.7MB in the beginning and 68.8MB in the end (delta: -26.0MB). Peak memory consumption was 3.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.12ms. Allocated memory is still 92.3MB. Free memory was 68.8MB in the beginning and 67.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.57ms. Allocated memory is still 92.3MB. Free memory was 67.3MB in the beginning and 66.4MB in the end (delta: 951.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 272.76ms. Allocated memory is still 92.3MB. Free memory was 66.1MB in the beginning and 56.7MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 7183.94ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 56.2MB in the beginning and 65.3MB in the end (delta: -9.1MB). Peak memory consumption was 42.9MB. Max. memory is 16.1GB. * Witness Printer took 77.72ms. Allocated memory is still 111.1MB. Free memory was 65.3MB in the beginning and 62.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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: 7.1s, OverallIterations: 9, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 88 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 65 mSDsluCounter, 1202 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 869 mSDsCounter, 50 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 388 IncrementalHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50 mSolverCounterUnsat, 333 mSDtfsCounter, 388 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 610 GetRequests, 545 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=8, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 54 PreInvPairs, 90 NumberOfFragments, 328 HoareAnnotationTreeSize, 54 FomulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 1640 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 390 NumberOfCodeBlocks, 390 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 616 ConstructedInterpolants, 0 QuantifiedInterpolants, 1677 SizeOfPredicates, 18 NumberOfNonLiveVariables, 959 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 650/692 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: (a == x * p + y * r && y * s + x * q + a == x * p + b + y * r) && q * r + 1 == s * p - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-17 11:54:33,455 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