./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.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 5bfe5681b6d73d5859a119345279b9da165675f4eb4d814fdf24f92881f7a27f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 04:14:11,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 04:14:11,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 04:14:11,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 04:14:11,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 04:14:11,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 04:14:11,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 04:14:11,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 04:14:11,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 04:14:11,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 04:14:11,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 04:14:11,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 04:14:11,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 04:14:11,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 04:14:11,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 04:14:11,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 04:14:11,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 04:14:11,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 04:14:11,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 04:14:11,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 04:14:11,362 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 04:14:11,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 04:14:11,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 04:14:11,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 04:14:11,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 04:14:11,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 04:14:11,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 04:14:11,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 04:14:11,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 04:14:11,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 04:14:11,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 04:14:11,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 04:14:11,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 04:14:11,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 04:14:11,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 04:14:11,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 04:14:11,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 04:14:11,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 04:14:11,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 04:14:11,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 04:14:11,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 04:14:11,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 04:14:11,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 04:14:11,404 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 04:14:11,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 04:14:11,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 04:14:11,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 04:14:11,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 04:14:11,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 04:14:11,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 04:14:11,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 04:14:11,408 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 04:14:11,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 04:14:11,409 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 04:14:11,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 04:14:11,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 04:14:11,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 04:14:11,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 04:14:11,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 04:14:11,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 04:14:11,410 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 04:14:11,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 04:14:11,410 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 04:14:11,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 04:14:11,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 04:14:11,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 04:14:11,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 04:14:11,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 04:14:11,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 04:14:11,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 04:14:11,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 04:14:11,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 04:14:11,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 04:14:11,413 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 04:14:11,413 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 04:14:11,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 04:14:11,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bfe5681b6d73d5859a119345279b9da165675f4eb4d814fdf24f92881f7a27f [2022-07-21 04:14:11,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 04:14:11,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 04:14:11,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 04:14:11,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 04:14:11,786 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 04:14:11,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2022-07-21 04:14:11,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87403e14e/d8fce75dfb0e49f08bfb99dd2b8ca100/FLAG2a4cc7da2 [2022-07-21 04:14:12,326 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 04:14:12,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2022-07-21 04:14:12,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87403e14e/d8fce75dfb0e49f08bfb99dd2b8ca100/FLAG2a4cc7da2 [2022-07-21 04:14:12,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87403e14e/d8fce75dfb0e49f08bfb99dd2b8ca100 [2022-07-21 04:14:12,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 04:14:12,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 04:14:12,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 04:14:12,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 04:14:12,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 04:14:12,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a376122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12, skipping insertion in model container [2022-07-21 04:14:12,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 04:14:12,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 04:14:12,508 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c[458,471] [2022-07-21 04:14:12,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 04:14:12,537 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 04:14:12,553 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c[458,471] [2022-07-21 04:14:12,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 04:14:12,574 INFO L208 MainTranslator]: Completed translation [2022-07-21 04:14:12,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12 WrapperNode [2022-07-21 04:14:12,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 04:14:12,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 04:14:12,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 04:14:12,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 04:14:12,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,617 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2022-07-21 04:14:12,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 04:14:12,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 04:14:12,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 04:14:12,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 04:14:12,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 04:14:12,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 04:14:12,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 04:14:12,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 04:14:12,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (1/1) ... [2022-07-21 04:14:12,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 04:14:12,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:14:12,697 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 04:14:12,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 04:14:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 04:14:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 04:14:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 04:14:12,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 04:14:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-21 04:14:12,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-21 04:14:12,804 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 04:14:12,806 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 04:14:12,975 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 04:14:12,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 04:14:12,981 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 04:14:12,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:14:12 BoogieIcfgContainer [2022-07-21 04:14:12,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 04:14:12,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 04:14:12,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 04:14:12,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 04:14:12,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:14:12" (1/3) ... [2022-07-21 04:14:13,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623de0b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:14:13, skipping insertion in model container [2022-07-21 04:14:13,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:14:12" (2/3) ... [2022-07-21 04:14:13,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@623de0b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:14:13, skipping insertion in model container [2022-07-21 04:14:13,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:14:12" (3/3) ... [2022-07-21 04:14:13,021 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound50.c [2022-07-21 04:14:13,034 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 04:14:13,034 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 04:14:13,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 04:14:13,079 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4f793fc2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c7e4d57 [2022-07-21 04:14:13,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 04:14:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-07-21 04:14:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 04:14:13,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:13,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:13,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:13,105 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2022-07-21 04:14:13,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:13,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223165053] [2022-07-21 04:14:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:13,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:14:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:14:13,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:14:13,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223165053] [2022-07-21 04:14:13,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223165053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:14:13,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:14:13,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 04:14:13,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271671785] [2022-07-21 04:14:13,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:14:13,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 04:14:13,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:14:13,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 04:14:13,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 04:14:13,309 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-07-21 04:14:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:14:13,331 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2022-07-21 04:14:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 04:14:13,334 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 [2022-07-21 04:14:13,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:14:13,342 INFO L225 Difference]: With dead ends: 37 [2022-07-21 04:14:13,342 INFO L226 Difference]: Without dead ends: 16 [2022-07-21 04:14:13,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 04:14:13,349 INFO L413 NwaCegarLoop]: 23 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, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:14:13,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:14:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-21 04:14:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-21 04:14:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-07-21 04:14:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-21 04:14:13,395 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-07-21 04:14:13,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:14:13,395 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-21 04:14:13,396 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) [2022-07-21 04:14:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-21 04:14:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 04:14:13,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:13,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:13,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 04:14:13,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2022-07-21 04:14:13,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:13,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775540422] [2022-07-21 04:14:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:13,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:14:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:14:13,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:14:13,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775540422] [2022-07-21 04:14:13,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775540422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:14:13,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:14:13,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 04:14:13,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760150513] [2022-07-21 04:14:13,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:14:13,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 04:14:13,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:14:13,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 04:14:13,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 04:14:13,496 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 04:14:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:14:13,524 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-07-21 04:14:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 04:14:13,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2022-07-21 04:14:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:14:13,526 INFO L225 Difference]: With dead ends: 26 [2022-07-21 04:14:13,526 INFO L226 Difference]: Without dead ends: 18 [2022-07-21 04:14:13,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 04:14:13,527 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:14:13,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:14:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-21 04:14:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-21 04:14:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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) [2022-07-21 04:14:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-07-21 04:14:13,533 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2022-07-21 04:14:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:14:13,533 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-07-21 04:14:13,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 04:14:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-07-21 04:14:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 04:14:13,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:13,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:13,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 04:14:13,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2022-07-21 04:14:13,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:13,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151494555] [2022-07-21 04:14:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:13,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:13,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:14:13,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438078293] [2022-07-21 04:14:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:13,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:13,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:14:13,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:14:13,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 04:14:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:14:13,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 04:14:13,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:14:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:14:13,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 04:14:13,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:14:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151494555] [2022-07-21 04:14:13,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:14:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438078293] [2022-07-21 04:14:13,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438078293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 04:14:13,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 04:14:13,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 04:14:13,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012610326] [2022-07-21 04:14:13,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:14:13,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 04:14:13,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:14:13,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 04:14:13,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 04:14:13,695 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 04:14:13,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:14:13,740 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-07-21 04:14:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 04:14:13,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2022-07-21 04:14:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:14:13,741 INFO L225 Difference]: With dead ends: 28 [2022-07-21 04:14:13,741 INFO L226 Difference]: Without dead ends: 24 [2022-07-21 04:14:13,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 04:14:13,743 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:14:13,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:14:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-21 04:14:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-21 04:14:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 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) [2022-07-21 04:14:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-21 04:14:13,750 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2022-07-21 04:14:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:14:13,750 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-21 04:14:13,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 04:14:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-21 04:14:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 04:14:13,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:13,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:13,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 04:14:13,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:13,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:13,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2022-07-21 04:14:13,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:13,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411341683] [2022-07-21 04:14:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:13,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:13,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:14:13,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025778785] [2022-07-21 04:14:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:13,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:13,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:14:13,990 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:14:14,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 04:14:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:14:14,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 04:14:14,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:14:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:14:14,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:14:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:14:14,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:14:14,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411341683] [2022-07-21 04:14:14,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:14:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025778785] [2022-07-21 04:14:14,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025778785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:14:14,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:14:14,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-21 04:14:14,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875137063] [2022-07-21 04:14:14,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:14:14,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 04:14:14,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:14:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 04:14:14,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-21 04:14:14,154 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:14:33,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 19.60s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-21 04:14:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:14:33,922 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-07-21 04:14:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 04:14:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-21 04:14:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:14:33,923 INFO L225 Difference]: With dead ends: 58 [2022-07-21 04:14:33,924 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 04:14:33,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 04:14:33,925 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-07-21 04:14:33,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 93 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 19.7s Time] [2022-07-21 04:14:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 04:14:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-07-21 04:14:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 04:14:33,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-07-21 04:14:33,935 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2022-07-21 04:14:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:14:33,935 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-07-21 04:14:33,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 04:14:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-07-21 04:14:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 04:14:33,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:33,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:33,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 04:14:34,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-21 04:14:34,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:34,160 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2022-07-21 04:14:34,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:34,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721449687] [2022-07-21 04:14:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:34,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:34,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:14:34,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265139782] [2022-07-21 04:14:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:34,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:34,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:14:34,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:14:34,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 04:14:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:14:34,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 04:14:34,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:14:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 04:14:34,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:14:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 04:14:34,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:14:34,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721449687] [2022-07-21 04:14:34,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:14:34,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265139782] [2022-07-21 04:14:34,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265139782] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 04:14:34,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:14:34,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-21 04:14:34,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187462905] [2022-07-21 04:14:34,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 04:14:34,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 04:14:34,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:14:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 04:14:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 04:14:34,505 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-07-21 04:14:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:14:34,561 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-07-21 04:14:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 04:14:34,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 18 [2022-07-21 04:14:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:14:34,563 INFO L225 Difference]: With dead ends: 60 [2022-07-21 04:14:34,564 INFO L226 Difference]: Without dead ends: 52 [2022-07-21 04:14:34,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 04:14:34,569 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 04:14:34,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 04:14:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-21 04:14:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-07-21 04:14:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 04:14:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-07-21 04:14:34,582 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2022-07-21 04:14:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:14:34,582 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-07-21 04:14:34,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-07-21 04:14:34,583 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-07-21 04:14:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 04:14:34,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:34,584 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:34,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 04:14:34,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:34,795 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2022-07-21 04:14:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:34,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511792543] [2022-07-21 04:14:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:34,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:34,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:14:34,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661920412] [2022-07-21 04:14:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:34,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:34,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:14:34,808 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:14:34,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 04:14:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:14:34,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 04:14:34,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:14:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 04:14:34,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:14:35,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:14:35,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511792543] [2022-07-21 04:14:35,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:14:35,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661920412] [2022-07-21 04:14:35,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661920412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:14:35,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:14:35,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-21 04:14:35,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303361199] [2022-07-21 04:14:35,189 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:14:35,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 04:14:35,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:14:35,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 04:14:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-21 04:14:35,192 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 04:14:35,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:14:35,290 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-07-21 04:14:35,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 04:14:35,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-07-21 04:14:35,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:14:35,292 INFO L225 Difference]: With dead ends: 51 [2022-07-21 04:14:35,292 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 04:14:35,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-21 04:14:35,294 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:14:35,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:14:35,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 04:14:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-21 04:14:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 04:14:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-07-21 04:14:35,305 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2022-07-21 04:14:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:14:35,306 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-07-21 04:14:35,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 04:14:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-07-21 04:14:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 04:14:35,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:35,308 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:35,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 04:14:35,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:35,533 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2022-07-21 04:14:35,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:35,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93177183] [2022-07-21 04:14:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:35,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:35,543 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:14:35,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038013948] [2022-07-21 04:14:35,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 04:14:35,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:14:35,545 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:14:35,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 04:14:35,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 04:14:35,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:14:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 04:14:35,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:14:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 04:14:35,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:14:35,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:14:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93177183] [2022-07-21 04:14:35,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:14:35,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038013948] [2022-07-21 04:14:35,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038013948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:14:35,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:14:35,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-07-21 04:14:35,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89852029] [2022-07-21 04:14:35,946 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:14:35,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 04:14:35,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:14:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 04:14:35,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-21 04:14:35,947 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 04:14:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:14:36,041 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-07-21 04:14:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 04:14:36,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-07-21 04:14:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:14:36,043 INFO L225 Difference]: With dead ends: 50 [2022-07-21 04:14:36,043 INFO L226 Difference]: Without dead ends: 44 [2022-07-21 04:14:36,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-21 04:14:36,044 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:14:36,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 125 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:14:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-21 04:14:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-21 04:14:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 04:14:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-07-21 04:14:36,052 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2022-07-21 04:14:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:14:36,053 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-07-21 04:14:36,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 04:14:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-07-21 04:14:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 04:14:36,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:36,054 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:36,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-21 04:14:36,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:36,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:36,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:36,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1183870932, now seen corresponding path program 3 times [2022-07-21 04:14:36,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:36,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329599268] [2022-07-21 04:14:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:36,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:36,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:14:36,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116040875] [2022-07-21 04:14:36,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 04:14:36,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:14:36,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:14:36,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 04:14:37,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 04:14:37,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:14:37,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 04:14:37,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:14:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 04:14:37,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:14:37,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:14:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329599268] [2022-07-21 04:14:37,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:14:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116040875] [2022-07-21 04:14:37,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116040875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:14:37,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:14:37,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-07-21 04:14:37,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039125781] [2022-07-21 04:14:37,742 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:14:37,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 04:14:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:14:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 04:14:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-21 04:14:37,744 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 04:14:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:14:37,871 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-07-21 04:14:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 04:14:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2022-07-21 04:14:37,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:14:37,872 INFO L225 Difference]: With dead ends: 52 [2022-07-21 04:14:37,872 INFO L226 Difference]: Without dead ends: 46 [2022-07-21 04:14:37,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-21 04:14:37,873 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:14:37,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 161 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:14:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-21 04:14:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-21 04:14:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 04:14:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-07-21 04:14:37,882 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 45 [2022-07-21 04:14:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:14:37,882 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-07-21 04:14:37,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 04:14:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-07-21 04:14:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 04:14:37,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:37,884 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:37,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 04:14:38,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:38,091 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:38,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2022-07-21 04:14:38,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:38,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320477804] [2022-07-21 04:14:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:38,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:38,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:14:38,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429876149] [2022-07-21 04:14:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:38,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:38,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:14:38,103 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:14:38,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 04:14:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:14:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 04:14:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:14:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 04:14:38,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:14:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 04:14:38,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:14:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320477804] [2022-07-21 04:14:38,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:14:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429876149] [2022-07-21 04:14:38,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429876149] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:14:38,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:14:38,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-21 04:14:38,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672471192] [2022-07-21 04:14:38,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:14:38,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 04:14:38,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:14:38,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 04:14:38,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-21 04:14:38,314 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-21 04:14:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:14:38,524 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2022-07-21 04:14:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 04:14:38,526 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2022-07-21 04:14:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:14:38,527 INFO L225 Difference]: With dead ends: 132 [2022-07-21 04:14:38,527 INFO L226 Difference]: Without dead ends: 122 [2022-07-21 04:14:38,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-07-21 04:14:38,530 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:14:38,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 159 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:14:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-21 04:14:38,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2022-07-21 04:14:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-21 04:14:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2022-07-21 04:14:38,561 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2022-07-21 04:14:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:14:38,561 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2022-07-21 04:14:38,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-21 04:14:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2022-07-21 04:14:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 04:14:38,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:38,563 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:38,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 04:14:38,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:38,780 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:38,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:38,780 INFO L85 PathProgramCache]: Analyzing trace with hash 348710830, now seen corresponding path program 4 times [2022-07-21 04:14:38,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:38,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587844918] [2022-07-21 04:14:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:38,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:38,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:14:38,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72472218] [2022-07-21 04:14:38,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 04:14:38,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:38,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:14:38,792 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:14:38,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 04:14:38,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 04:14:38,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:14:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 04:14:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:14:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 04:14:38,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:14:39,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:14:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587844918] [2022-07-21 04:14:39,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:14:39,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72472218] [2022-07-21 04:14:39,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72472218] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:14:39,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:14:39,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-07-21 04:14:39,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132724421] [2022-07-21 04:14:39,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:14:39,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 04:14:39,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:14:39,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 04:14:39,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-21 04:14:39,155 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 04:14:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:14:39,300 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2022-07-21 04:14:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 04:14:39,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-07-21 04:14:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:14:39,302 INFO L225 Difference]: With dead ends: 102 [2022-07-21 04:14:39,302 INFO L226 Difference]: Without dead ends: 96 [2022-07-21 04:14:39,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-21 04:14:39,303 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 04:14:39,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 197 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 04:14:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-21 04:14:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-07-21 04:14:39,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-21 04:14:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-07-21 04:14:39,315 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 53 [2022-07-21 04:14:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:14:39,315 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-07-21 04:14:39,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 04:14:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-07-21 04:14:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 04:14:39,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:14:39,316 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:14:39,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 04:14:39,541 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,SelfDestructingSolverStorable9 [2022-07-21 04:14:39,542 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:14:39,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:14:39,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 5 times [2022-07-21 04:14:39,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:14:39,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975409302] [2022-07-21 04:14:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:14:39,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:14:39,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:14:39,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462224330] [2022-07-21 04:14:39,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 04:14:39,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:14:39,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:14:39,555 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:14:39,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 04:14:40,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 04:14:40,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:14:40,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-21 04:14:40,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:14:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 39 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-21 04:14:40,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:15:05,469 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (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| |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| (- 6)) (* |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))) 12) 0)) (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 [2022-07-21 04:15:05,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:15:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975409302] [2022-07-21 04:15:05,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:15:05,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462224330] [2022-07-21 04:15:05,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462224330] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:15:05,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:15:05,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-21 04:15:05,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702671828] [2022-07-21 04:15:05,472 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:15:05,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 04:15:05,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:15:05,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 04:15:05,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=315, Unknown=5, NotChecked=36, Total=420 [2022-07-21 04:15:05,473 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 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) [2022-07-21 04:15:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:15:05,777 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-07-21 04:15:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 04:15:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 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 61 [2022-07-21 04:15:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:15:05,778 INFO L225 Difference]: With dead ends: 101 [2022-07-21 04:15:05,778 INFO L226 Difference]: Without dead ends: 95 [2022-07-21 04:15:05,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=85, Invalid=420, Unknown=5, NotChecked=42, Total=552 [2022-07-21 04:15:05,779 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 04:15:05,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 251 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 04:15:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-21 04:15:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-07-21 04:15:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-21 04:15:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2022-07-21 04:15:05,797 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2022-07-21 04:15:05,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:15:05,797 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2022-07-21 04:15:05,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 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) [2022-07-21 04:15:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2022-07-21 04:15:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-21 04:15:05,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:15:05,800 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:15:05,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-21 04:15:06,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:15:06,007 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:15:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:15:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1106405730, now seen corresponding path program 6 times [2022-07-21 04:15:06,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:15:06,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967523542] [2022-07-21 04:15:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:15:06,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:15:06,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:15:06,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551421357] [2022-07-21 04:15:06,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 04:15:06,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:15:06,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:15:06,032 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:15:06,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 04:15:06,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-21 04:15:06,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:15:06,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 04:15:06,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:15:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-21 04:15:06,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:15:07,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:15:07,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967523542] [2022-07-21 04:15:07,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:15:07,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551421357] [2022-07-21 04:15:07,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551421357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:15:07,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:15:07,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-21 04:15:07,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704196577] [2022-07-21 04:15:07,117 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:15:07,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 04:15:07,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:15:07,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 04:15:07,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-21 04:15:07,118 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2022-07-21 04:15:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:15:07,329 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-07-21 04:15:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 04:15:07,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 69 [2022-07-21 04:15:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:15:07,331 INFO L225 Difference]: With dead ends: 100 [2022-07-21 04:15:07,331 INFO L226 Difference]: Without dead ends: 94 [2022-07-21 04:15:07,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-21 04:15:07,332 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 285 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 [2022-07-21 04:15:07,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 285 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 04:15:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-21 04:15:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-21 04:15:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 04:15:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2022-07-21 04:15:07,342 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 69 [2022-07-21 04:15:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:15:07,343 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2022-07-21 04:15:07,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2022-07-21 04:15:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2022-07-21 04:15:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-21 04:15:07,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:15:07,344 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:15:07,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 04:15:07,551 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,SelfDestructingSolverStorable11 [2022-07-21 04:15:07,551 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:15:07,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:15:07,552 INFO L85 PathProgramCache]: Analyzing trace with hash -317230276, now seen corresponding path program 7 times [2022-07-21 04:15:07,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:15:07,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746436443] [2022-07-21 04:15:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:15:07,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:15:07,562 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:15:07,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707470291] [2022-07-21 04:15:07,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 04:15:07,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:15:07,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:15:07,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:15:07,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 04:15:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 04:15:08,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 04:15:08,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:15:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-21 04:15:08,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:15:08,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:15:08,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746436443] [2022-07-21 04:15:08,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:15:08,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707470291] [2022-07-21 04:15:08,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707470291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:15:08,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:15:08,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-21 04:15:08,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111068940] [2022-07-21 04:15:08,572 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:15:08,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 04:15:08,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:15:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 04:15:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-07-21 04:15:08,573 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 04:15:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:15:08,803 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-07-21 04:15:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 04:15:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2022-07-21 04:15:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:15:08,804 INFO L225 Difference]: With dead ends: 99 [2022-07-21 04:15:08,804 INFO L226 Difference]: Without dead ends: 93 [2022-07-21 04:15:08,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-07-21 04:15:08,805 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 04:15:08,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 335 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 04:15:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-21 04:15:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-21 04:15:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 04:15:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-21 04:15:08,813 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 77 [2022-07-21 04:15:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:15:08,814 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-21 04:15:08,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 04:15:08,814 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-21 04:15:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-21 04:15:08,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:15:08,815 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:15:08,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 04:15:09,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 04:15:09,022 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:15:09,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:15:09,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1298793238, now seen corresponding path program 8 times [2022-07-21 04:15:09,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:15:09,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908834158] [2022-07-21 04:15:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:15:09,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:15:09,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:15:09,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015008734] [2022-07-21 04:15:09,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 04:15:09,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:15:09,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:15:09,041 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:15:09,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 04:15:09,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 04:15:09,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:15:09,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 04:15:09,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:15:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-21 04:15:10,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:15:10,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:15:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908834158] [2022-07-21 04:15:10,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:15:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015008734] [2022-07-21 04:15:10,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015008734] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:15:10,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:15:10,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-21 04:15:10,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027659497] [2022-07-21 04:15:10,329 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:15:10,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 04:15:10,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:15:10,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 04:15:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-07-21 04:15:10,330 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:15:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:15:10,624 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-07-21 04:15:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 04:15:10,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2022-07-21 04:15:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:15:10,625 INFO L225 Difference]: With dead ends: 98 [2022-07-21 04:15:10,625 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 04:15:10,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-21 04:15:10,626 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 04:15:10,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 389 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 04:15:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 04:15:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-21 04:15:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-21 04:15:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-07-21 04:15:10,647 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2022-07-21 04:15:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:15:10,648 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-07-21 04:15:10,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 04:15:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-07-21 04:15:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-21 04:15:10,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:15:10,649 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:15:10,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 04:15:10,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 04:15:10,856 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:15:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:15:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1207691024, now seen corresponding path program 9 times [2022-07-21 04:15:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:15:10,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062012780] [2022-07-21 04:15:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:15:10,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:15:10,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:15:10,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988434156] [2022-07-21 04:15:10,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 04:15:10,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:15:10,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:15:10,887 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:15:10,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 04:15:45,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-21 04:15:45,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:15:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 04:15:45,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:15:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 22 proven. 180 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-07-21 04:15:45,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:15:46,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:15:46,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062012780] [2022-07-21 04:15:46,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:15:46,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988434156] [2022-07-21 04:15:46,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988434156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:15:46,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:15:46,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-21 04:15:46,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370489164] [2022-07-21 04:15:46,187 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:15:46,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 04:15:46,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:15:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 04:15:46,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-07-21 04:15:46,188 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-21 04:15:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:15:46,527 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-07-21 04:15:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 04:15:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 93 [2022-07-21 04:15:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:15:46,529 INFO L225 Difference]: With dead ends: 100 [2022-07-21 04:15:46,529 INFO L226 Difference]: Without dead ends: 94 [2022-07-21 04:15:46,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-07-21 04:15:46,533 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 04:15:46,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 449 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 04:15:46,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-21 04:15:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-21 04:15:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 04:15:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-07-21 04:15:46,545 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 93 [2022-07-21 04:15:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:15:46,546 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-07-21 04:15:46,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-21 04:15:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-07-21 04:15:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-21 04:15:46,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:15:46,548 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:15:46,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 04:15:46,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 04:15:46,768 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:15:46,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:15:46,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1956819211, now seen corresponding path program 2 times [2022-07-21 04:15:46,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:15:46,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357108101] [2022-07-21 04:15:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:15:46,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:15:46,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:15:46,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379975844] [2022-07-21 04:15:46,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 04:15:46,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:15:46,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:15:46,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:15:46,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 04:15:46,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 04:15:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:15:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 04:15:46,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:15:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 04:15:47,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:15:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-07-21 04:15:47,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:15:47,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357108101] [2022-07-21 04:15:47,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:15:47,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379975844] [2022-07-21 04:15:47,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379975844] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 04:15:47,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 04:15:47,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-21 04:15:47,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881687299] [2022-07-21 04:15:47,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 04:15:47,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 04:15:47,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:15:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 04:15:47,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-07-21 04:15:47,250 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-07-21 04:15:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:15:47,785 INFO L93 Difference]: Finished difference Result 264 states and 288 transitions. [2022-07-21 04:15:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 04:15:47,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 95 [2022-07-21 04:15:47,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:15:47,787 INFO L225 Difference]: With dead ends: 264 [2022-07-21 04:15:47,788 INFO L226 Difference]: Without dead ends: 254 [2022-07-21 04:15:47,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 04:15:47,789 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 269 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 04:15:47,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 241 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 04:15:47,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-21 04:15:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 199. [2022-07-21 04:15:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 152 states have internal predecessors, (154), 35 states have call successors, (35), 23 states have call predecessors, (35), 22 states have return successors, (34), 23 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-21 04:15:47,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 223 transitions. [2022-07-21 04:15:47,811 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 223 transitions. Word has length 95 [2022-07-21 04:15:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:15:47,811 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 223 transitions. [2022-07-21 04:15:47,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-07-21 04:15:47,812 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 223 transitions. [2022-07-21 04:15:47,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-21 04:15:47,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:15:47,813 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:15:47,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 04:15:48,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:15:48,027 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:15:48,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:15:48,028 INFO L85 PathProgramCache]: Analyzing trace with hash -939543350, now seen corresponding path program 10 times [2022-07-21 04:15:48,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:15:48,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420803924] [2022-07-21 04:15:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:15:48,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:15:48,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:15:48,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393864546] [2022-07-21 04:15:48,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 04:15:48,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:15:48,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:15:48,051 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:15:48,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 04:15:48,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 04:15:48,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:15:48,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 04:15:48,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:15:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 24 proven. 220 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-21 04:15:48,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:15:48,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:15:48,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420803924] [2022-07-21 04:15:48,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:15:48,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393864546] [2022-07-21 04:15:48,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393864546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:15:48,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:15:48,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-21 04:15:48,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801423994] [2022-07-21 04:15:48,514 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:15:48,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 04:15:48,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:15:48,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 04:15:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-21 04:15:48,516 INFO L87 Difference]: Start difference. First operand 199 states and 223 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 04:15:48,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:15:48,824 INFO L93 Difference]: Finished difference Result 204 states and 227 transitions. [2022-07-21 04:15:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 04:15:48,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 101 [2022-07-21 04:15:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:15:48,826 INFO L225 Difference]: With dead ends: 204 [2022-07-21 04:15:48,826 INFO L226 Difference]: Without dead ends: 198 [2022-07-21 04:15:48,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-07-21 04:15:48,827 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 04:15:48,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 509 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 04:15:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-07-21 04:15:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-07-21 04:15:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 141 states have (on average 1.0851063829787233) internal successors, (153), 151 states have internal predecessors, (153), 34 states have call successors, (34), 23 states have call predecessors, (34), 22 states have return successors, (33), 23 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-21 04:15:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 220 transitions. [2022-07-21 04:15:48,846 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 220 transitions. Word has length 101 [2022-07-21 04:15:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:15:48,846 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 220 transitions. [2022-07-21 04:15:48,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-21 04:15:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 220 transitions. [2022-07-21 04:15:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-21 04:15:48,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:15:48,848 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:15:48,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 04:15:49,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 04:15:49,051 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:15:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:15:49,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1584846500, now seen corresponding path program 11 times [2022-07-21 04:15:49,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:15:49,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087407074] [2022-07-21 04:15:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:15:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:15:49,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:15:49,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377068419] [2022-07-21 04:15:49,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 04:15:49,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:15:49,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:15:49,062 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:15:49,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 04:15:52,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-21 04:15:52,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 04:15:52,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 04:15:52,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 04:15:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-21 04:15:52,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 04:15:52,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 04:15:52,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087407074] [2022-07-21 04:15:52,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 04:15:52,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377068419] [2022-07-21 04:15:52,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377068419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 04:15:52,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-21 04:15:52,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-21 04:15:52,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414519269] [2022-07-21 04:15:52,996 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-21 04:15:52,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 04:15:52,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 04:15:52,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 04:15:52,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-21 04:15:52,998 INFO L87 Difference]: Start difference. First operand 198 states and 220 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 04:15:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 04:15:53,352 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2022-07-21 04:15:53,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 04:15:53,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 109 [2022-07-21 04:15:53,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 04:15:53,354 INFO L225 Difference]: With dead ends: 203 [2022-07-21 04:15:53,354 INFO L226 Difference]: Without dead ends: 197 [2022-07-21 04:15:53,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-07-21 04:15:53,355 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 04:15:53,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 575 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 04:15:53,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-21 04:15:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-07-21 04:15:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 141 states have (on average 1.0780141843971631) internal successors, (152), 150 states have internal predecessors, (152), 33 states have call successors, (33), 23 states have call predecessors, (33), 22 states have return successors, (32), 23 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-21 04:15:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 217 transitions. [2022-07-21 04:15:53,380 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 217 transitions. Word has length 109 [2022-07-21 04:15:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 04:15:53,381 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 217 transitions. [2022-07-21 04:15:53,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-21 04:15:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 217 transitions. [2022-07-21 04:15:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-21 04:15:53,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 04:15:53,384 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 04:15:53,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 04:15:53,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 04:15:53,592 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 04:15:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 04:15:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1568440706, now seen corresponding path program 12 times [2022-07-21 04:15:53,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 04:15:53,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655980236] [2022-07-21 04:15:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 04:15:53,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 04:15:53,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-21 04:15:53,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342990553] [2022-07-21 04:15:53,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 04:15:53,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 04:15:53,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 04:15:53,601 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 04:15:53,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process