./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/ps6-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/ps6-ll.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 07abfb6a25bc8999c03b9e73c88de3af15c2169770f93c7bfb47efae6a8a30d3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 01:25:56,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 01:25:56,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 01:25:56,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 01:25:56,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 01:25:56,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 01:25:56,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 01:25:56,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 01:25:56,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 01:25:56,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 01:25:56,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 01:25:56,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 01:25:56,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 01:25:56,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 01:25:56,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 01:25:56,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 01:25:56,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 01:25:56,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 01:25:56,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 01:25:56,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 01:25:56,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 01:25:56,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 01:25:56,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 01:25:56,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 01:25:56,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 01:25:56,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 01:25:56,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 01:25:56,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 01:25:56,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 01:25:56,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 01:25:56,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 01:25:56,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 01:25:56,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 01:25:56,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 01:25:56,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 01:25:56,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 01:25:56,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 01:25:56,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 01:25:56,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 01:25:56,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 01:25:56,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 01:25:56,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 01:25:56,686 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 01:25:56,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 01:25:56,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 01:25:56,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 01:25:56,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 01:25:56,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 01:25:56,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 01:25:56,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 01:25:56,689 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 01:25:56,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 01:25:56,690 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 01:25:56,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 01:25:56,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 01:25:56,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 01:25:56,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 01:25:56,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 01:25:56,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 01:25:56,691 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 01:25:56,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 01:25:56,691 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 01:25:56,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 01:25:56,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 01:25:56,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 01:25:56,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 01:25:56,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:25:56,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 01:25:56,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 01:25:56,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 01:25:56,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 01:25:56,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 01:25:56,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 01:25:56,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 01:25:56,694 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 01:25:56,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 01:25:56,694 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 01:25:56,694 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07abfb6a25bc8999c03b9e73c88de3af15c2169770f93c7bfb47efae6a8a30d3 [2023-02-17 01:25:56,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 01:25:56,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 01:25:56,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 01:25:56,991 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 01:25:56,992 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 01:25:57,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/ps6-ll.c [2023-02-17 01:25:58,166 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 01:25:58,363 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 01:25:58,363 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps6-ll.c [2023-02-17 01:25:58,369 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317ff8a2a/1a371866afc04eaebc31805f3d48f26b/FLAG4937db32f [2023-02-17 01:25:58,385 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317ff8a2a/1a371866afc04eaebc31805f3d48f26b [2023-02-17 01:25:58,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 01:25:58,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 01:25:58,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 01:25:58,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 01:25:58,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 01:25:58,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6167b790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58, skipping insertion in model container [2023-02-17 01:25:58,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 01:25:58,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 01:25:58,546 WARN L237 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/ps6-ll.c[458,471] [2023-02-17 01:25:58,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:25:58,568 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 01:25:58,578 WARN L237 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/ps6-ll.c[458,471] [2023-02-17 01:25:58,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:25:58,595 INFO L208 MainTranslator]: Completed translation [2023-02-17 01:25:58,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58 WrapperNode [2023-02-17 01:25:58,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 01:25:58,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 01:25:58,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 01:25:58,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 01:25:58,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,624 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2023-02-17 01:25:58,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 01:25:58,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 01:25:58,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 01:25:58,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 01:25:58,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,641 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 01:25:58,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 01:25:58,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 01:25:58,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 01:25:58,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (1/1) ... [2023-02-17 01:25:58,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:25:58,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:25:58,672 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) [2023-02-17 01:25:58,696 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 [2023-02-17 01:25:58,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 01:25:58,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 01:25:58,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 01:25:58,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 01:25:58,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 01:25:58,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 01:25:58,765 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 01:25:58,767 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 01:25:58,869 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 01:25:58,875 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 01:25:58,875 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 01:25:58,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:25:58 BoogieIcfgContainer [2023-02-17 01:25:58,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 01:25:58,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 01:25:58,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 01:25:58,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 01:25:58,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 01:25:58" (1/3) ... [2023-02-17 01:25:58,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24874077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:25:58, skipping insertion in model container [2023-02-17 01:25:58,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:25:58" (2/3) ... [2023-02-17 01:25:58,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24874077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:25:58, skipping insertion in model container [2023-02-17 01:25:58,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:25:58" (3/3) ... [2023-02-17 01:25:58,885 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll.c [2023-02-17 01:25:58,899 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 01:25:58,900 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 01:25:58,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 01:25:58,945 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1a5ab158, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 01:25:58,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 01:25:58,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 01:25:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 01:25:58,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:25:58,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:25:58,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:25:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:25:58,960 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2023-02-17 01:25:58,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:25:58,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342471355] [2023-02-17 01:25:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:25:58,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:25:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:25:59,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:25:59,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342471355] [2023-02-17 01:25:59,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 01:25:59,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788182345] [2023-02-17 01:25:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:25:59,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:25:59,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:25:59,085 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) [2023-02-17 01:25:59,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 01:25:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:25:59,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 01:25:59,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:25:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:25:59,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:25:59,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788182345] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:25:59,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:25:59,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 01:25:59,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863121455] [2023-02-17 01:25:59,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:25:59,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 01:25:59,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:25:59,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 01:25:59,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:25:59,265 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:25:59,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:25:59,294 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2023-02-17 01:25:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 01:25:59,296 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 01:25:59,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:25:59,301 INFO L225 Difference]: With dead ends: 35 [2023-02-17 01:25:59,301 INFO L226 Difference]: Without dead ends: 15 [2023-02-17 01:25:59,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:25:59,307 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2023-02-17 01:25:59,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:25:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-17 01:25:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-17 01:25:59,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 01:25:59,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-17 01:25:59,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-02-17 01:25:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:25:59,342 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-17 01:25:59,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:25:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-17 01:25:59,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 01:25:59,344 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:25:59,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:25:59,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 01:25:59,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-17 01:25:59,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:25:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:25:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2023-02-17 01:25:59,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:25:59,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968933219] [2023-02-17 01:25:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:25:59,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:25:59,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:25:59,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532151605] [2023-02-17 01:25:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:25:59,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:25:59,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:25:59,567 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) [2023-02-17 01:25:59,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 01:25:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:25:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 01:25:59,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:25:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:25:59,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:25:59,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:25:59,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968933219] [2023-02-17 01:25:59,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:25:59,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532151605] [2023-02-17 01:25:59,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532151605] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:25:59,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:25:59,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 01:25:59,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014163120] [2023-02-17 01:25:59,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:25:59,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 01:25:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:25:59,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 01:25:59,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 01:25:59,678 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:25:59,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:25:59,816 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-02-17 01:25:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:25:59,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 01:25:59,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:25:59,817 INFO L225 Difference]: With dead ends: 26 [2023-02-17 01:25:59,817 INFO L226 Difference]: Without dead ends: 22 [2023-02-17 01:25:59,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 01:25:59,819 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:25:59,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:25:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-17 01:25:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-17 01:25:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 01:25:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-17 01:25:59,828 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2023-02-17 01:25:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:25:59,828 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-17 01:25:59,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:25:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-17 01:25:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 01:25:59,829 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:25:59,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:25:59,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 01:26:00,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-17 01:26:00,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:00,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:00,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2023-02-17 01:26:00,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:26:00,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737498258] [2023-02-17 01:26:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:00,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:26:00,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:26:00,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773990189] [2023-02-17 01:26:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:00,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:00,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:26:00,062 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) [2023-02-17 01:26:00,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 01:26:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:26:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 01:26:00,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:26:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:26:00,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:26:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:26:00,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:26:00,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737498258] [2023-02-17 01:26:00,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:26:00,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773990189] [2023-02-17 01:26:00,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773990189] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:26:00,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:26:00,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-17 01:26:00,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287141809] [2023-02-17 01:26:00,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:26:00,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 01:26:00,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:26:00,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 01:26:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-17 01:26:00,412 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 01:26:00,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:26:00,514 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-02-17 01:26:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 01:26:00,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-17 01:26:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:26:00,516 INFO L225 Difference]: With dead ends: 33 [2023-02-17 01:26:00,516 INFO L226 Difference]: Without dead ends: 29 [2023-02-17 01:26:00,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-17 01:26:00,518 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:26:00,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 58 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:26:00,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-17 01:26:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2023-02-17 01:26:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 01:26:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-02-17 01:26:00,528 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2023-02-17 01:26:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:26:00,529 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-02-17 01:26:00,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 01:26:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-02-17 01:26:00,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 01:26:00,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:26:00,530 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:26:00,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 01:26:00,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:00,736 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:00,737 INFO L85 PathProgramCache]: Analyzing trace with hash 233982219, now seen corresponding path program 1 times [2023-02-17 01:26:00,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:26:00,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077456586] [2023-02-17 01:26:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:00,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:26:00,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:26:00,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147339634] [2023-02-17 01:26:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:00,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:00,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:26:00,751 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) [2023-02-17 01:26:00,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 01:26:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:26:00,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 01:26:00,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:26:02,906 WARN L859 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main_~k~0#1|) (<= 0 (+ (div (+ (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* 5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 6)) 12) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (= |c_ULTIMATE.start_main_~y~0#1| (+ 0 1)) (<= |c_ULTIMATE.start_main_~k~0#1| 1) (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) is different from true [2023-02-17 01:26:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 01:26:02,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:26:05,106 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (let ((.cse0 (* .cse1 .cse1))) (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (not (>= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 5) (div (+ (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* 119 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 65) (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 18)) 12) 1) (+ |c_ULTIMATE.start_main_~x~0#1| (* (* (* .cse0 .cse1) .cse1) .cse1)))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= (* |ULTIMATE.start_main_~k~0#1| .cse1) .cse0) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))))) is different from false [2023-02-17 01:26:05,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:26:05,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077456586] [2023-02-17 01:26:05,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:26:05,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147339634] [2023-02-17 01:26:05,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147339634] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:26:05,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:26:05,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-17 01:26:05,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622539707] [2023-02-17 01:26:05,133 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:26:05,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 01:26:05,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:26:05,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 01:26:05,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=144, Unknown=2, NotChecked=50, Total=240 [2023-02-17 01:26:05,135 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 01:26:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:26:05,286 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-02-17 01:26:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 01:26:05,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-02-17 01:26:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:26:05,287 INFO L225 Difference]: With dead ends: 33 [2023-02-17 01:26:05,287 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 01:26:05,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=66, Invalid=212, Unknown=2, NotChecked=62, Total=342 [2023-02-17 01:26:05,289 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:26:05,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2023-02-17 01:26:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 01:26:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-17 01:26:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 01:26:05,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-02-17 01:26:05,299 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2023-02-17 01:26:05,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:26:05,299 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-02-17 01:26:05,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 01:26:05,300 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-02-17 01:26:05,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 01:26:05,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:26:05,300 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:26:05,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 01:26:05,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:05,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash -595331518, now seen corresponding path program 2 times [2023-02-17 01:26:05,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:26:05,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743595215] [2023-02-17 01:26:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:05,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:26:05,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:26:05,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524052937] [2023-02-17 01:26:05,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:26:05,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:26:05,528 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) [2023-02-17 01:26:05,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 01:26:05,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:26:05,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:26:05,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 01:26:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:26:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 01:26:05,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:26:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 01:26:05,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:26:05,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743595215] [2023-02-17 01:26:05,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:26:05,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524052937] [2023-02-17 01:26:05,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524052937] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:26:05,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:26:05,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-02-17 01:26:05,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772796842] [2023-02-17 01:26:05,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:26:05,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 01:26:05,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:26:05,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 01:26:05,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-02-17 01:26:05,754 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 01:26:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:26:06,069 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-02-17 01:26:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 01:26:06,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 34 [2023-02-17 01:26:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:26:06,070 INFO L225 Difference]: With dead ends: 44 [2023-02-17 01:26:06,070 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 01:26:06,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2023-02-17 01:26:06,072 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:26:06,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 136 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:26:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 01:26:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-02-17 01:26:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 01:26:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-02-17 01:26:06,089 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 34 [2023-02-17 01:26:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:26:06,089 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-02-17 01:26:06,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 01:26:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-02-17 01:26:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 01:26:06,091 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:26:06,091 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:26:06,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 01:26:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:06,304 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash 858822987, now seen corresponding path program 3 times [2023-02-17 01:26:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:26:06,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694918976] [2023-02-17 01:26:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:26:06,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:26:06,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943072612] [2023-02-17 01:26:06,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:26:06,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:06,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:26:06,322 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) [2023-02-17 01:26:06,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 01:26:06,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 01:26:06,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:26:06,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 01:26:06,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:26:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 19 proven. 58 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-17 01:26:08,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:26:08,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:26:08,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694918976] [2023-02-17 01:26:08,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:26:08,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943072612] [2023-02-17 01:26:08,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943072612] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:26:08,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:26:08,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-17 01:26:08,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120470098] [2023-02-17 01:26:08,477 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:26:08,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 01:26:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:26:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 01:26:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-02-17 01:26:08,479 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 01:26:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:26:08,724 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-02-17 01:26:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 01:26:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2023-02-17 01:26:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:26:08,726 INFO L225 Difference]: With dead ends: 45 [2023-02-17 01:26:08,726 INFO L226 Difference]: Without dead ends: 39 [2023-02-17 01:26:08,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-02-17 01:26:08,727 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:26:08,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 137 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:26:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-17 01:26:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-02-17 01:26:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 01:26:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2023-02-17 01:26:08,743 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 55 [2023-02-17 01:26:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:26:08,744 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2023-02-17 01:26:08,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 01:26:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2023-02-17 01:26:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-17 01:26:08,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:26:08,745 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:26:08,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 01:26:08,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:08,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:08,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1272372738, now seen corresponding path program 4 times [2023-02-17 01:26:08,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:26:08,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685968883] [2023-02-17 01:26:08,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:08,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:26:08,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:26:08,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718231603] [2023-02-17 01:26:08,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:26:08,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:26:08,971 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) [2023-02-17 01:26:08,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 01:26:09,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:26:09,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:26:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 01:26:09,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:26:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-02-17 01:26:09,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:26:09,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:26:09,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685968883] [2023-02-17 01:26:09,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:26:09,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718231603] [2023-02-17 01:26:09,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718231603] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:26:09,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:26:09,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-17 01:26:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895356308] [2023-02-17 01:26:09,527 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:26:09,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 01:26:09,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:26:09,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 01:26:09,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-02-17 01:26:09,528 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 01:26:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:26:09,754 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2023-02-17 01:26:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 01:26:09,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 62 [2023-02-17 01:26:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:26:09,755 INFO L225 Difference]: With dead ends: 48 [2023-02-17 01:26:09,755 INFO L226 Difference]: Without dead ends: 42 [2023-02-17 01:26:09,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-17 01:26:09,756 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:26:09,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 204 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:26:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-17 01:26:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-02-17 01:26:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 01:26:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-02-17 01:26:09,771 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 62 [2023-02-17 01:26:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:26:09,772 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-02-17 01:26:09,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 01:26:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-02-17 01:26:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-17 01:26:09,773 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:26:09,773 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:26:09,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 01:26:09,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:09,979 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:09,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1582509419, now seen corresponding path program 5 times [2023-02-17 01:26:09,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:26:09,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655171094] [2023-02-17 01:26:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:09,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:26:09,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:26:10,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618285084] [2023-02-17 01:26:10,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 01:26:10,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:10,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:26:10,002 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) [2023-02-17 01:26:10,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 01:26:10,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-17 01:26:10,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:26:10,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-17 01:26:10,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:26:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 41 proven. 85 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-17 01:26:10,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:26:12,510 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) is different from false [2023-02-17 01:26:16,546 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 11) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 5)) 12) 0)))) is different from true [2023-02-17 01:26:22,575 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 11) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 5)) 12) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-17 01:26:24,584 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) is different from false [2023-02-17 01:26:26,605 WARN L837 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 11) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (= (* |ULTIMATE.start_main_~k~0#1| .cse0) (* .cse0 .cse0))) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-17 01:26:26,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:26:26,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655171094] [2023-02-17 01:26:26,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:26:26,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618285084] [2023-02-17 01:26:26,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618285084] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:26:26,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:26:26,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 01:26:26,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393966504] [2023-02-17 01:26:26,615 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:26:26,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:26:26,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:26:26,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:26:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=242, Unknown=5, NotChecked=170, Total=462 [2023-02-17 01:26:26,616 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 01:26:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:26:26,935 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-02-17 01:26:26,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 01:26:26,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 69 [2023-02-17 01:26:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:26:26,936 INFO L225 Difference]: With dead ends: 51 [2023-02-17 01:26:26,936 INFO L226 Difference]: Without dead ends: 45 [2023-02-17 01:26:26,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=63, Invalid=332, Unknown=5, NotChecked=200, Total=600 [2023-02-17 01:26:26,937 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:26:26,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 187 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 01:26:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-17 01:26:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-02-17 01:26:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 01:26:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-02-17 01:26:26,951 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 69 [2023-02-17 01:26:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:26:26,952 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-02-17 01:26:26,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-17 01:26:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-02-17 01:26:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-17 01:26:26,953 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:26:26,953 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:26:26,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 01:26:27,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-17 01:26:27,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:27,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash -527735326, now seen corresponding path program 6 times [2023-02-17 01:26:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:26:27,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746921770] [2023-02-17 01:26:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:27,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:26:27,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:26:27,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451265701] [2023-02-17 01:26:27,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 01:26:27,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:27,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:26:27,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:26:27,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 01:26:27,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-17 01:26:27,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:26:27,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-17 01:26:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:26:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-17 01:26:27,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:26:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-17 01:26:28,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:26:28,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746921770] [2023-02-17 01:26:28,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:26:28,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451265701] [2023-02-17 01:26:28,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451265701] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:26:28,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:26:28,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2023-02-17 01:26:28,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893036115] [2023-02-17 01:26:28,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:26:28,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 01:26:28,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:26:28,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 01:26:28,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2023-02-17 01:26:28,049 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-17 01:26:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:26:29,210 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2023-02-17 01:26:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-17 01:26:29,213 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 76 [2023-02-17 01:26:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:26:29,215 INFO L225 Difference]: With dead ends: 80 [2023-02-17 01:26:29,215 INFO L226 Difference]: Without dead ends: 72 [2023-02-17 01:26:29,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=533, Invalid=1917, Unknown=0, NotChecked=0, Total=2450 [2023-02-17 01:26:29,217 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 115 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 01:26:29,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 380 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 01:26:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-17 01:26:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-02-17 01:26:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-02-17 01:26:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2023-02-17 01:26:29,244 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 76 [2023-02-17 01:26:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:26:29,245 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2023-02-17 01:26:29,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-17 01:26:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2023-02-17 01:26:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-02-17 01:26:29,248 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:26:29,248 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:26:29,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 01:26:29,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:29,451 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2104642059, now seen corresponding path program 7 times [2023-02-17 01:26:29,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:26:29,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740616145] [2023-02-17 01:26:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:29,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:26:29,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:26:29,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787564489] [2023-02-17 01:26:29,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 01:26:29,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:26:29,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:26:29,465 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:26:29,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 01:26:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2023-02-17 01:26:32,249 WARN L124 FreeRefinementEngine]: Strategy CAMEL was unsuccessful and could not determine trace feasibility [2023-02-17 01:26:32,250 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2023-02-17 01:26:32,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-17 01:26:32,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 01:26:32,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 01:26:32,462 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2023-02-17 01:26:32,464 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-17 01:26:32,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.02 01:26:32 BoogieIcfgContainer [2023-02-17 01:26:32,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-17 01:26:32,490 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-17 01:26:32,490 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-17 01:26:32,490 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-17 01:26:32,491 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:25:58" (3/4) ... [2023-02-17 01:26:32,493 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-17 01:26:32,494 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-17 01:26:32,494 INFO L158 Benchmark]: Toolchain (without parser) took 34105.45ms. Allocated memory is still 163.6MB. Free memory was 127.3MB in the beginning and 120.6MB in the end (delta: 6.7MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2023-02-17 01:26:32,494 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 111.1MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 01:26:32,495 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.10ms. Allocated memory is still 163.6MB. Free memory was 126.7MB in the beginning and 116.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 01:26:32,495 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.31ms. Allocated memory is still 163.6MB. Free memory was 116.2MB in the beginning and 114.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-17 01:26:32,495 INFO L158 Benchmark]: Boogie Preprocessor took 17.69ms. Allocated memory is still 163.6MB. Free memory was 114.7MB in the beginning and 114.1MB in the end (delta: 625.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 01:26:32,495 INFO L158 Benchmark]: RCFGBuilder took 233.42ms. Allocated memory is still 163.6MB. Free memory was 113.9MB in the beginning and 103.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-17 01:26:32,496 INFO L158 Benchmark]: TraceAbstraction took 33610.60ms. Allocated memory is still 163.6MB. Free memory was 103.4MB in the beginning and 120.6MB in the end (delta: -17.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 01:26:32,496 INFO L158 Benchmark]: Witness Printer took 3.50ms. Allocated memory is still 163.6MB. Free memory is still 120.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-17 01:26:32,497 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 111.1MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 205.10ms. Allocated memory is still 163.6MB. Free memory was 126.7MB in the beginning and 116.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.31ms. Allocated memory is still 163.6MB. Free memory was 116.2MB in the beginning and 114.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.69ms. Allocated memory is still 163.6MB. Free memory was 114.7MB in the beginning and 114.1MB in the end (delta: 625.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 233.42ms. Allocated memory is still 163.6MB. Free memory was 113.9MB in the beginning and 103.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 33610.60ms. Allocated memory is still 163.6MB. Free memory was 103.4MB in the beginning and 120.6MB in the end (delta: -17.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.50ms. Allocated memory is still 163.6MB. Free memory is still 120.6MB. There was no memory consumed. 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 - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L18] short k; [L19] long long y, x, c; [L20] k = __VERIFIER_nondet_short() [L21] CALL assume_abort_if_not(k <= 256) [L7] COND FALSE !(!cond) [L21] RET assume_abort_if_not(k <= 256) [L23] y = 0 [L24] x = 0 [L25] c = 0 [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y * y * y + x [L27] COND TRUE 1 [L28] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L30] COND TRUE !(c < k) [L38] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L10] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) [L39] CALL __VERIFIER_assert(k*y == y*y) [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.5s, OverallIterations: 10, TraceHistogramMax: 20, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 206 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 201 mSDsluCounter, 1229 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 27 IncrementalHoareTripleChecker+Unchecked, 1014 mSDsCounter, 166 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2039 IncrementalHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 166 mSolverCounterUnsat, 215 mSDtfsCounter, 2039 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 593 GetRequests, 422 SyntacticMatches, 7 SemanticMatches, 164 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 17.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=9, InterpolantAutomatonStates: 108, 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, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 24.0s InterpolantComputationTime, 505 NumberOfCodeBlocks, 495 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 471 ConstructedInterpolants, 0 QuantifiedInterpolants, 4629 SizeOfPredicates, 36 NumberOfNonLiveVariables, 995 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 859/1307 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-02-17 01:26:32,523 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/ps6-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 07abfb6a25bc8999c03b9e73c88de3af15c2169770f93c7bfb47efae6a8a30d3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 01:26:34,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 01:26:34,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 01:26:34,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 01:26:34,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 01:26:34,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 01:26:34,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 01:26:34,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 01:26:34,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 01:26:34,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 01:26:34,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 01:26:34,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 01:26:34,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 01:26:34,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 01:26:34,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 01:26:34,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 01:26:34,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 01:26:34,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 01:26:34,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 01:26:34,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 01:26:34,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 01:26:34,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 01:26:34,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 01:26:34,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 01:26:34,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 01:26:34,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 01:26:34,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 01:26:34,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 01:26:34,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 01:26:34,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 01:26:34,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 01:26:34,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 01:26:34,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 01:26:34,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 01:26:34,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 01:26:34,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 01:26:34,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 01:26:34,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 01:26:34,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 01:26:34,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 01:26:34,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 01:26:34,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-17 01:26:34,690 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 01:26:34,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 01:26:34,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 01:26:34,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 01:26:34,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 01:26:34,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 01:26:34,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 01:26:34,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 01:26:34,693 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 01:26:34,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 01:26:34,694 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 01:26:34,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 01:26:34,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 01:26:34,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 01:26:34,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 01:26:34,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 01:26:34,695 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 01:26:34,695 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-17 01:26:34,695 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-17 01:26:34,695 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 01:26:34,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 01:26:34,695 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 01:26:34,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 01:26:34,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 01:26:34,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 01:26:34,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 01:26:34,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:26:34,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 01:26:34,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 01:26:34,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 01:26:34,697 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-17 01:26:34,697 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-17 01:26:34,697 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 01:26:34,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 01:26:34,698 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 01:26:34,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 01:26:34,698 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-17 01:26:34,698 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 01:26:34,698 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07abfb6a25bc8999c03b9e73c88de3af15c2169770f93c7bfb47efae6a8a30d3 [2023-02-17 01:26:35,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 01:26:35,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 01:26:35,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 01:26:35,057 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 01:26:35,059 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 01:26:35,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/ps6-ll.c [2023-02-17 01:26:36,254 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 01:26:36,453 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 01:26:36,453 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps6-ll.c [2023-02-17 01:26:36,465 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b394441ea/d6a6e35f908845cb8bc520b84e2c0bfc/FLAG86f601d68 [2023-02-17 01:26:36,490 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b394441ea/d6a6e35f908845cb8bc520b84e2c0bfc [2023-02-17 01:26:36,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 01:26:36,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 01:26:36,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 01:26:36,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 01:26:36,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 01:26:36,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c5d1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36, skipping insertion in model container [2023-02-17 01:26:36,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 01:26:36,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 01:26:36,674 WARN L237 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/ps6-ll.c[458,471] [2023-02-17 01:26:36,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:26:36,714 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 01:26:36,726 WARN L237 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/ps6-ll.c[458,471] [2023-02-17 01:26:36,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:26:36,763 INFO L208 MainTranslator]: Completed translation [2023-02-17 01:26:36,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36 WrapperNode [2023-02-17 01:26:36,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 01:26:36,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 01:26:36,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 01:26:36,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 01:26:36,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,802 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 37 [2023-02-17 01:26:36,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 01:26:36,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 01:26:36,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 01:26:36,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 01:26:36,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,842 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 01:26:36,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 01:26:36,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 01:26:36,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 01:26:36,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (1/1) ... [2023-02-17 01:26:36,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:26:36,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:26:36,886 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) [2023-02-17 01:26:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 01:26:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-17 01:26:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 01:26:36,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 01:26:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 01:26:36,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 01:26:36,905 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 [2023-02-17 01:26:36,989 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 01:26:36,990 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 01:26:37,355 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 01:26:37,372 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 01:26:37,372 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 01:26:37,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:26:37 BoogieIcfgContainer [2023-02-17 01:26:37,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 01:26:37,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 01:26:37,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 01:26:37,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 01:26:37,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 01:26:36" (1/3) ... [2023-02-17 01:26:37,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223b005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:26:37, skipping insertion in model container [2023-02-17 01:26:37,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:26:36" (2/3) ... [2023-02-17 01:26:37,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223b005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:26:37, skipping insertion in model container [2023-02-17 01:26:37,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:26:37" (3/3) ... [2023-02-17 01:26:37,382 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll.c [2023-02-17 01:26:37,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 01:26:37,398 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 01:26:37,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 01:26:37,461 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2134dd75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 01:26:37,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 01:26:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 01:26:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 01:26:37,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:26:37,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:26:37,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2023-02-17 01:26:37,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-17 01:26:37,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072216193] [2023-02-17 01:26:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:37,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:26:37,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-17 01:26:37,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-17 01:26:37,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-17 01:26:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:26:37,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 01:26:37,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:26:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:26:37,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:26:37,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-17 01:26:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072216193] [2023-02-17 01:26:37,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072216193] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:26:37,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:26:37,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 01:26:37,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129304128] [2023-02-17 01:26:37,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:26:37,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 01:26:37,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-17 01:26:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 01:26:37,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:26:37,864 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:26:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:26:37,893 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2023-02-17 01:26:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 01:26:37,895 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 01:26:37,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:26:37,901 INFO L225 Difference]: With dead ends: 35 [2023-02-17 01:26:37,901 INFO L226 Difference]: Without dead ends: 15 [2023-02-17 01:26:37,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:26:37,908 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2023-02-17 01:26:37,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:26:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-17 01:26:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-17 01:26:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 01:26:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-17 01:26:37,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-02-17 01:26:37,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:26:37,980 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-17 01:26:37,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:26:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-17 01:26:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 01:26:37,982 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:26:37,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:26:38,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-02-17 01:26:38,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:26:38,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:38,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2023-02-17 01:26:38,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-17 01:26:38,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641560896] [2023-02-17 01:26:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:38,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:26:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-17 01:26:38,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-17 01:26:38,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-17 01:26:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:26:38,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 01:26:38,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:26:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:26:38,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:26:38,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-17 01:26:38,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641560896] [2023-02-17 01:26:38,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641560896] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:26:38,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:26:38,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 01:26:38,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115438194] [2023-02-17 01:26:38,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:26:38,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:26:38,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-17 01:26:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:26:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 01:26:38,584 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:26:41,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-17 01:26:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:26:42,085 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-02-17 01:26:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 01:26:42,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 01:26:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:26:42,100 INFO L225 Difference]: With dead ends: 26 [2023-02-17 01:26:42,101 INFO L226 Difference]: Without dead ends: 22 [2023-02-17 01:26:42,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 01:26:42,103 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-17 01:26:42,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-02-17 01:26:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-17 01:26:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-17 01:26:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 01:26:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-17 01:26:42,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2023-02-17 01:26:42,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:26:42,111 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-17 01:26:42,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 01:26:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-17 01:26:42,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 01:26:42,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:26:42,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:26:42,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-02-17 01:26:42,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:26:42,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:26:42,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:26:42,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2023-02-17 01:26:42,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-17 01:26:42,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889136015] [2023-02-17 01:26:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:26:42,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:26:42,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-17 01:26:42,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-17 01:26:42,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-02-17 01:26:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:26:42,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 01:26:42,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:26:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 01:26:44,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:27:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 01:27:03,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-17 01:27:03,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889136015] [2023-02-17 01:27:03,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889136015] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:27:03,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:27:03,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-02-17 01:27:03,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963795518] [2023-02-17 01:27:03,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:27:03,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:27:03,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-17 01:27:03,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:27:03,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:27:03,060 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 01:27:04,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-17 01:27:06,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-17 01:27:12,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-17 01:27:16,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-17 01:27:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:27:16,416 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-02-17 01:27:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:27:16,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-17 01:27:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:27:16,417 INFO L225 Difference]: With dead ends: 28 [2023-02-17 01:27:16,417 INFO L226 Difference]: Without dead ends: 24 [2023-02-17 01:27:16,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-17 01:27:16,418 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:27:16,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 12.0s Time] [2023-02-17 01:27:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-17 01:27:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-17 01:27:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 01:27:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-02-17 01:27:16,426 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2023-02-17 01:27:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:27:16,426 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-02-17 01:27:16,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 01:27:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-02-17 01:27:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 01:27:16,427 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:27:16,428 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:27:16,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-02-17 01:27:16,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:27:16,646 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:27:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:27:16,647 INFO L85 PathProgramCache]: Analyzing trace with hash 233982219, now seen corresponding path program 1 times [2023-02-17 01:27:16,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-17 01:27:16,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372260105] [2023-02-17 01:27:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:27:16,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:27:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-17 01:27:16,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-17 01:27:16,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-17 01:27:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:27:17,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 01:27:17,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:27:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 01:27:17,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:27:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 01:27:25,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-17 01:27:25,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372260105] [2023-02-17 01:27:25,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372260105] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:27:25,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:27:25,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2023-02-17 01:27:25,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720900083] [2023-02-17 01:27:25,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:27:25,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 01:27:25,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-17 01:27:25,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 01:27:25,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-02-17 01:27:25,705 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 01:27:35,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-17 01:27:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:27:48,596 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-02-17 01:27:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 01:27:48,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 27 [2023-02-17 01:27:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:27:48,598 INFO L225 Difference]: With dead ends: 41 [2023-02-17 01:27:48,598 INFO L226 Difference]: Without dead ends: 33 [2023-02-17 01:27:48,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2023-02-17 01:27:48,600 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:27:48,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 116 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2023-02-17 01:27:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-17 01:27:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-17 01:27:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 01:27:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-17 01:27:48,616 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 27 [2023-02-17 01:27:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:27:48,617 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-17 01:27:48,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 01:27:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-17 01:27:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 01:27:48,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:27:48,619 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:27:48,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-02-17 01:27:48,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:27:48,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:27:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:27:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1195970082, now seen corresponding path program 2 times [2023-02-17 01:27:48,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-17 01:27:48,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610318955] [2023-02-17 01:27:48,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:27:48,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:27:48,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-17 01:27:48,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-17 01:27:48,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-02-17 01:27:50,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:27:50,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:27:50,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 01:27:50,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:27:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-17 01:27:51,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:28:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-17 01:28:05,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-17 01:28:05,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610318955] [2023-02-17 01:28:05,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610318955] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:28:05,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:28:05,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-02-17 01:28:05,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672888565] [2023-02-17 01:28:05,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:28:05,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 01:28:05,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-17 01:28:05,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 01:28:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-02-17 01:28:05,853 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 01:28:12,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-17 01:29:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:29:00,459 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2023-02-17 01:29:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 01:29:00,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 48 [2023-02-17 01:29:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:29:00,461 INFO L225 Difference]: With dead ends: 59 [2023-02-17 01:29:00,461 INFO L226 Difference]: Without dead ends: 51 [2023-02-17 01:29:00,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-02-17 01:29:00,462 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 67 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:29:00,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 211 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 34.3s Time] [2023-02-17 01:29:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-17 01:29:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-02-17 01:29:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 01:29:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-02-17 01:29:00,483 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 48 [2023-02-17 01:29:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:29:00,485 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-02-17 01:29:00,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 01:29:00,485 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-02-17 01:29:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-17 01:29:00,487 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:29:00,488 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:29:00,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-02-17 01:29:00,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:29:00,689 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:29:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:29:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2135205314, now seen corresponding path program 3 times [2023-02-17 01:29:00,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-17 01:29:00,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987366297] [2023-02-17 01:29:00,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:29:00,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-17 01:29:00,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-17 01:29:00,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-17 01:29:00,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-02-17 01:29:11,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-17 01:29:11,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:29:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 01:29:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:29:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-17 01:29:13,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:29:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-17 01:29:54,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-17 01:29:54,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987366297] [2023-02-17 01:29:54,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987366297] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:29:54,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:29:54,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2023-02-17 01:29:54,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351301476] [2023-02-17 01:29:54,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:29:54,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 01:29:54,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-17 01:29:54,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 01:29:54,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2023-02-17 01:29:54,771 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 24 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24)