./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/ps4-ll_valuebound100.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 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 16:44:39,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 16:44:39,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 16:44:39,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 16:44:39,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 16:44:39,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 16:44:39,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 16:44:39,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 16:44:39,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 16:44:39,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 16:44:39,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 16:44:39,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 16:44:39,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 16:44:39,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 16:44:39,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 16:44:39,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 16:44:39,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 16:44:39,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 16:44:39,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 16:44:39,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 16:44:39,677 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 16:44:39,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 16:44:39,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 16:44:39,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 16:44:39,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 16:44:39,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 16:44:39,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 16:44:39,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 16:44:39,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 16:44:39,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 16:44:39,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 16:44:39,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 16:44:39,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 16:44:39,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 16:44:39,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 16:44:39,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 16:44:39,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 16:44:39,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 16:44:39,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 16:44:39,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 16:44:39,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 16:44:39,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 16:44:39,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 16:44:39,719 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 16:44:39,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 16:44:39,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 16:44:39,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 16:44:39,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 16:44:39,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 16:44:39,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 16:44:39,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 16:44:39,722 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 16:44:39,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 16:44:39,723 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 16:44:39,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 16:44:39,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 16:44:39,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 16:44:39,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 16:44:39,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 16:44:39,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 16:44:39,724 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 16:44:39,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 16:44:39,725 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 16:44:39,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 16:44:39,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 16:44:39,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 16:44:39,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 16:44:39,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:44:39,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 16:44:39,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 16:44:39,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 16:44:39,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 16:44:39,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 16:44:39,726 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 16:44:39,727 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 16:44:39,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 16:44:39,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 [2022-07-22 16:44:39,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 16:44:39,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 16:44:39,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 16:44:39,889 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 16:44:39,889 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 16:44:39,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-07-22 16:44:39,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0de56f8/991a9594333d4410a52c912f997eca84/FLAG9f0da8662 [2022-07-22 16:44:40,274 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 16:44:40,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-07-22 16:44:40,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0de56f8/991a9594333d4410a52c912f997eca84/FLAG9f0da8662 [2022-07-22 16:44:40,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0de56f8/991a9594333d4410a52c912f997eca84 [2022-07-22 16:44:40,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 16:44:40,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 16:44:40,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 16:44:40,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 16:44:40,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 16:44:40,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19dbc975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40, skipping insertion in model container [2022-07-22 16:44:40,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 16:44:40,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 16:44:40,436 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/ps4-ll_valuebound100.c[458,471] [2022-07-22 16:44:40,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:44:40,456 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 16:44:40,463 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/ps4-ll_valuebound100.c[458,471] [2022-07-22 16:44:40,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:44:40,475 INFO L208 MainTranslator]: Completed translation [2022-07-22 16:44:40,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40 WrapperNode [2022-07-22 16:44:40,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 16:44:40,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 16:44:40,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 16:44:40,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 16:44:40,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,496 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-07-22 16:44:40,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 16:44:40,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 16:44:40,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 16:44:40,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 16:44:40,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 16:44:40,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 16:44:40,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 16:44:40,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 16:44:40,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (1/1) ... [2022-07-22 16:44:40,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:44:40,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:40,539 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) [2022-07-22 16:44:40,540 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 [2022-07-22 16:44:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 16:44:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 16:44:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 16:44:40,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 16:44:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 16:44:40,562 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 16:44:40,603 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 16:44:40,604 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 16:44:40,737 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 16:44:40,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 16:44:40,743 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 16:44:40,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:44:40 BoogieIcfgContainer [2022-07-22 16:44:40,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 16:44:40,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 16:44:40,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 16:44:40,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 16:44:40,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 04:44:40" (1/3) ... [2022-07-22 16:44:40,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e477df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:44:40, skipping insertion in model container [2022-07-22 16:44:40,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:44:40" (2/3) ... [2022-07-22 16:44:40,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e477df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:44:40, skipping insertion in model container [2022-07-22 16:44:40,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:44:40" (3/3) ... [2022-07-22 16:44:40,752 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2022-07-22 16:44:40,762 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 16:44:40,762 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 16:44:40,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 16:44:40,819 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@c9b4876, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4792e89b [2022-07-22 16:44:40,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 16:44:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 16:44:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 16:44:40,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:40,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:40,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:40,837 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2022-07-22 16:44:40,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:40,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553488303] [2022-07-22 16:44:40,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:40,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:44:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:44:40,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:40,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553488303] [2022-07-22 16:44:40,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553488303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:44:40,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:44:40,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 16:44:40,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282889436] [2022-07-22 16:44:40,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:44:40,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 16:44:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:40,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 16:44:40,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:44:40,976 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:44:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:40,992 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-07-22 16:44:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 16:44:40,994 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 [2022-07-22 16:44:40,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:40,999 INFO L225 Difference]: With dead ends: 35 [2022-07-22 16:44:41,000 INFO L226 Difference]: Without dead ends: 15 [2022-07-22 16:44:41,001 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 [2022-07-22 16:44:41,004 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:41,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:44:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-22 16:44:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-22 16:44:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:44:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-22 16:44:41,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-07-22 16:44:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:41,039 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-22 16:44:41,039 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) [2022-07-22 16:44:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-22 16:44:41,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 16:44:41,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:41,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:41,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 16:44:41,041 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:41,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2022-07-22 16:44:41,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:41,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876144806] [2022-07-22 16:44:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:41,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:41,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:41,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648528810] [2022-07-22 16:44:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:41,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:41,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:41,070 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) [2022-07-22 16:44:41,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 16:44:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:44:41,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:44:41,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:44:41,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:44:41,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:41,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876144806] [2022-07-22 16:44:41,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:41,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648528810] [2022-07-22 16:44:41,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648528810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:44:41,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:44:41,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:44:41,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923314145] [2022-07-22 16:44:41,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:44:41,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:44:41,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:44:41,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:44:41,209 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:44:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:41,265 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-07-22 16:44:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:44:41,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 16:44:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:41,267 INFO L225 Difference]: With dead ends: 26 [2022-07-22 16:44:41,267 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 16:44:41,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:44:41,269 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:41,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:44:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 16:44:41,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-22 16:44:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 16:44:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-22 16:44:41,279 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2022-07-22 16:44:41,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:41,279 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-22 16:44:41,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:44:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-22 16:44:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 16:44:41,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:41,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:41,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 16:44:41,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:41,504 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2022-07-22 16:44:41,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:41,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923748562] [2022-07-22 16:44:41,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:41,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:41,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:41,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128079592] [2022-07-22 16:44:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:41,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:41,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:41,518 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) [2022-07-22 16:44:41,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 16:44:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:44:41,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:44:41,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:44:41,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 16:44:41,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:41,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923748562] [2022-07-22 16:44:41,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:41,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128079592] [2022-07-22 16:44:41,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128079592] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:41,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:41,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-22 16:44:41,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799585867] [2022-07-22 16:44:41,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:44:41,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:44:41,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:44:41,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:44:41,906 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:44:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:41,936 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-07-22 16:44:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:44:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-22 16:44:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:41,937 INFO L225 Difference]: With dead ends: 28 [2022-07-22 16:44:41,937 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 16:44:41,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:44:41,938 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:41,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:44:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 16:44:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-22 16:44:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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) [2022-07-22 16:44:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-07-22 16:44:41,944 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2022-07-22 16:44:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:41,945 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-07-22 16:44:41,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:44:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-07-22 16:44:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 16:44:41,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:41,947 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:41,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 16:44:42,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 16:44:42,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:42,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2022-07-22 16:44:42,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:42,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760128948] [2022-07-22 16:44:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:42,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:42,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:42,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848918902] [2022-07-22 16:44:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:42,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:42,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:42,173 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) [2022-07-22 16:44:42,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 16:44:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:44:42,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 16:44:42,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 16:44:42,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:42,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:42,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760128948] [2022-07-22 16:44:42,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:42,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848918902] [2022-07-22 16:44:42,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848918902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:42,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:42,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-07-22 16:44:42,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451588361] [2022-07-22 16:44:42,474 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:42,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 16:44:42,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:42,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 16:44:42,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-22 16:44:42,477 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:44:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:42,558 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-07-22 16:44:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 16:44:42,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-07-22 16:44:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:42,559 INFO L225 Difference]: With dead ends: 31 [2022-07-22 16:44:42,559 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 16:44:42,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:44:42,560 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:42,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:44:42,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 16:44:42,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-22 16:44:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 16:44:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-07-22 16:44:42,566 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-07-22 16:44:42,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:42,566 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-07-22 16:44:42,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:44:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-07-22 16:44:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 16:44:42,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:42,567 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:42,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 16:44:42,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:42,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:42,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:42,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2022-07-22 16:44:42,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:42,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652824027] [2022-07-22 16:44:42,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:42,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:42,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:42,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793918875] [2022-07-22 16:44:42,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:44:42,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:42,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:42,778 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) [2022-07-22 16:44:42,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 16:44:42,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:44:42,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:44:42,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 16:44:42,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:44:42,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:42,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652824027] [2022-07-22 16:44:42,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793918875] [2022-07-22 16:44:42,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793918875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:42,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:42,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-07-22 16:44:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419150147] [2022-07-22 16:44:42,988 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:42,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 16:44:42,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 16:44:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:44:42,989 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 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) [2022-07-22 16:44:43,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:43,057 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-07-22 16:44:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 16:44:43,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 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 [2022-07-22 16:44:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:43,058 INFO L225 Difference]: With dead ends: 34 [2022-07-22 16:44:43,058 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 16:44:43,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-22 16:44:43,059 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:43,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:44:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 16:44:43,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-22 16:44:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:44:43,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-22 16:44:43,078 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-07-22 16:44:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:43,079 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-22 16:44:43,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 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) [2022-07-22 16:44:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-22 16:44:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 16:44:43,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:43,081 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:43,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 16:44:43,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:43,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:43,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:43,301 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2022-07-22 16:44:43,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:43,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711949901] [2022-07-22 16:44:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:43,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:43,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:43,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118412781] [2022-07-22 16:44:43,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:44:43,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:43,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:43,314 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) [2022-07-22 16:44:43,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 16:44:43,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 16:44:43,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:44:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 16:44:43,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:44:43,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:47,800 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* (- 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|) (* (- 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))) 4) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (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|) (= (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* |ULTIMATE.start_main_~k~0#1| .cse0) (* (- 1) (* .cse0 .cse0)))) 0)))) is different from false [2022-07-22 16:44:47,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:47,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711949901] [2022-07-22 16:44:47,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:47,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118412781] [2022-07-22 16:44:47,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118412781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:47,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:47,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-22 16:44:47,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335568986] [2022-07-22 16:44:47,804 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:47,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 16:44:47,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 16:44:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=251, Unknown=1, NotChecked=32, Total=342 [2022-07-22 16:44:47,805 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:44:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:47,946 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-07-22 16:44:47,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 16:44:47,947 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-07-22 16:44:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:47,947 INFO L225 Difference]: With dead ends: 41 [2022-07-22 16:44:47,947 INFO L226 Difference]: Without dead ends: 36 [2022-07-22 16:44:47,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=79, Invalid=344, Unknown=1, NotChecked=38, Total=462 [2022-07-22 16:44:47,949 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:47,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 101 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:44:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-22 16:44:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-22 16:44:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 16:44:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-07-22 16:44:47,954 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2022-07-22 16:44:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:47,954 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-07-22 16:44:47,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:44:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-07-22 16:44:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 16:44:47,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:47,955 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:47,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 16:44:48,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:48,156 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1384689793, now seen corresponding path program 4 times [2022-07-22 16:44:48,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:48,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849497751] [2022-07-22 16:44:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:48,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:48,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287625098] [2022-07-22 16:44:48,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:44:48,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:48,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:48,164 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) [2022-07-22 16:44:48,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 16:44:48,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:44:48,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:44:48,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 16:44:48,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 16:44:48,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:48,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:48,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849497751] [2022-07-22 16:44:48,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:48,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287625098] [2022-07-22 16:44:48,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287625098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:48,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:48,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-07-22 16:44:48,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546102549] [2022-07-22 16:44:48,458 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:48,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 16:44:48,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:48,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 16:44:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-22 16:44:48,459 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 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) [2022-07-22 16:44:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:48,565 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-07-22 16:44:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 16:44:48,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 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 43 [2022-07-22 16:44:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:48,566 INFO L225 Difference]: With dead ends: 44 [2022-07-22 16:44:48,566 INFO L226 Difference]: Without dead ends: 39 [2022-07-22 16:44:48,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:44:48,568 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:48,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:44:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-22 16:44:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-22 16:44:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 16:44:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-07-22 16:44:48,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 43 [2022-07-22 16:44:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:48,574 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-07-22 16:44:48,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 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) [2022-07-22 16:44:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-07-22 16:44:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 16:44:48,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:48,575 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:48,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 16:44:48,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:48,775 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:48,776 INFO L85 PathProgramCache]: Analyzing trace with hash -23130184, now seen corresponding path program 5 times [2022-07-22 16:44:48,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:48,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952233031] [2022-07-22 16:44:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:48,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:48,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:48,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121318703] [2022-07-22 16:44:48,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 16:44:48,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:48,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:48,784 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) [2022-07-22 16:44:48,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 16:44:48,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 16:44:48,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:44:48,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 16:44:48,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-22 16:44:48,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:49,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:49,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952233031] [2022-07-22 16:44:49,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:49,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121318703] [2022-07-22 16:44:49,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121318703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:49,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:49,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-22 16:44:49,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700540517] [2022-07-22 16:44:49,264 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:49,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 16:44:49,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 16:44:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:44:49,265 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 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) [2022-07-22 16:44:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:49,399 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-07-22 16:44:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 16:44:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 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 50 [2022-07-22 16:44:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:49,400 INFO L225 Difference]: With dead ends: 47 [2022-07-22 16:44:49,400 INFO L226 Difference]: Without dead ends: 42 [2022-07-22 16:44:49,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-07-22 16:44:49,400 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:49,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 161 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:44:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-22 16:44:49,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-22 16:44:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:44:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-07-22 16:44:49,406 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 50 [2022-07-22 16:44:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:49,406 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-07-22 16:44:49,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 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) [2022-07-22 16:44:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-07-22 16:44:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 16:44:49,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:49,407 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:49,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 16:44:49,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:49,619 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:49,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1898941279, now seen corresponding path program 6 times [2022-07-22 16:44:49,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:49,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858069171] [2022-07-22 16:44:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:49,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:49,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:49,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425512885] [2022-07-22 16:44:49,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 16:44:49,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:49,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:49,627 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) [2022-07-22 16:44:49,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 16:44:49,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 16:44:49,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:44:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 16:44:49,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 16:44:49,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:49,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:49,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858069171] [2022-07-22 16:44:49,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:49,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425512885] [2022-07-22 16:44:49,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425512885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:49,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:49,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-07-22 16:44:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387198586] [2022-07-22 16:44:49,896 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:49,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 16:44:49,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:49,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 16:44:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:44:49,897 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:44:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:50,050 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-07-22 16:44:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 16:44:50,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 57 [2022-07-22 16:44:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:50,051 INFO L225 Difference]: With dead ends: 50 [2022-07-22 16:44:50,051 INFO L226 Difference]: Without dead ends: 45 [2022-07-22 16:44:50,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-22 16:44:50,052 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:50,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 189 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:44:50,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-22 16:44:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-22 16:44:50,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 16:44:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-07-22 16:44:50,061 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 57 [2022-07-22 16:44:50,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:50,063 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-07-22 16:44:50,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:44:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-07-22 16:44:50,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 16:44:50,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:50,065 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:50,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 16:44:50,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 16:44:50,275 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:50,276 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 7 times [2022-07-22 16:44:50,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:50,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752452511] [2022-07-22 16:44:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:50,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:50,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:50,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015727516] [2022-07-22 16:44:50,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 16:44:50,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:50,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:50,294 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) [2022-07-22 16:44:50,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 16:44:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:44:50,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 16:44:50,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 16:44:50,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:50,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:50,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752452511] [2022-07-22 16:44:50,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:50,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015727516] [2022-07-22 16:44:50,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015727516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:50,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:50,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-22 16:44:50,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812638345] [2022-07-22 16:44:50,778 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:50,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 16:44:50,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:50,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 16:44:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-07-22 16:44:50,779 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 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) [2022-07-22 16:44:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:50,961 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-22 16:44:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:44:50,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 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 64 [2022-07-22 16:44:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:50,962 INFO L225 Difference]: With dead ends: 53 [2022-07-22 16:44:50,962 INFO L226 Difference]: Without dead ends: 48 [2022-07-22 16:44:50,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:44:50,963 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:50,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 219 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:44:50,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-22 16:44:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-22 16:44:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 16:44:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-07-22 16:44:50,969 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 64 [2022-07-22 16:44:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:50,970 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-07-22 16:44:50,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 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) [2022-07-22 16:44:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-07-22 16:44:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 16:44:50,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:50,971 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:50,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 16:44:51,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 16:44:51,175 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:51,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:51,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 8 times [2022-07-22 16:44:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:51,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315102223] [2022-07-22 16:44:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:51,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:51,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918033137] [2022-07-22 16:44:51,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:44:51,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:51,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:51,184 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) [2022-07-22 16:44:51,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 16:44:51,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:44:51,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:44:51,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 16:44:51,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 16:44:51,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:51,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:51,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315102223] [2022-07-22 16:44:51,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:51,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918033137] [2022-07-22 16:44:51,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918033137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:51,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:51,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-22 16:44:51,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368171904] [2022-07-22 16:44:51,786 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:51,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 16:44:51,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 16:44:51,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-07-22 16:44:51,787 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 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) [2022-07-22 16:44:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:51,991 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-07-22 16:44:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 16:44:51,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 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 71 [2022-07-22 16:44:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:51,992 INFO L225 Difference]: With dead ends: 56 [2022-07-22 16:44:51,992 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 16:44:51,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-22 16:44:51,992 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:51,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 251 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 16:44:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 16:44:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-22 16:44:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 16:44:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-22 16:44:51,999 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 71 [2022-07-22 16:44:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:51,999 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-22 16:44:51,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 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) [2022-07-22 16:44:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-22 16:44:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-22 16:44:51,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:52,000 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:52,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 16:44:52,200 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,SelfDestructingSolverStorable10 [2022-07-22 16:44:52,200 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:52,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 9 times [2022-07-22 16:44:52,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:52,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155508067] [2022-07-22 16:44:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:52,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:52,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:52,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657113517] [2022-07-22 16:44:52,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:44:52,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:52,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:52,208 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) [2022-07-22 16:44:52,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 16:44:52,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-22 16:44:52,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:44:52,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 16:44:52,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-22 16:44:52,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:52,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:52,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155508067] [2022-07-22 16:44:52,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:52,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657113517] [2022-07-22 16:44:52,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657113517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:52,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:52,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-22 16:44:52,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397332821] [2022-07-22 16:44:52,759 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:52,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 16:44:52,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 16:44:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:44:52,760 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 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) [2022-07-22 16:44:52,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:52,993 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-07-22 16:44:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 16:44:52,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 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 78 [2022-07-22 16:44:52,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:52,994 INFO L225 Difference]: With dead ends: 59 [2022-07-22 16:44:52,994 INFO L226 Difference]: Without dead ends: 54 [2022-07-22 16:44:52,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-22 16:44:52,995 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:52,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 285 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 16:44:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-22 16:44:53,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-22 16:44:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 16:44:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-22 16:44:53,001 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 78 [2022-07-22 16:44:53,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:53,001 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-22 16:44:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 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) [2022-07-22 16:44:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-22 16:44:53,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 16:44:53,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:53,002 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:53,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-22 16:44:53,207 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,SelfDestructingSolverStorable11 [2022-07-22 16:44:53,207 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:53,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 10 times [2022-07-22 16:44:53,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:53,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180162118] [2022-07-22 16:44:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:53,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:53,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069691534] [2022-07-22 16:44:53,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:44:53,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:53,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:53,219 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) [2022-07-22 16:44:53,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 16:44:53,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:44:53,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:44:53,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 16:44:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-07-22 16:44:53,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:53,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:53,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180162118] [2022-07-22 16:44:53,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:53,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069691534] [2022-07-22 16:44:53,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069691534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:53,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:53,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-22 16:44:53,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863892053] [2022-07-22 16:44:53,750 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:53,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 16:44:53,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:53,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 16:44:53,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-22 16:44:53,751 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 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) [2022-07-22 16:44:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:54,028 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-07-22 16:44:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 16:44:54,028 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 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 85 [2022-07-22 16:44:54,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:54,029 INFO L225 Difference]: With dead ends: 62 [2022-07-22 16:44:54,029 INFO L226 Difference]: Without dead ends: 57 [2022-07-22 16:44:54,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-07-22 16:44:54,029 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:54,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 321 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 16:44:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-22 16:44:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-22 16:44:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-22 16:44:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-07-22 16:44:54,036 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 85 [2022-07-22 16:44:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:54,036 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-07-22 16:44:54,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 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) [2022-07-22 16:44:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-07-22 16:44:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 16:44:54,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:54,037 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:54,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 16:44:54,241 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,SelfDestructingSolverStorable12 [2022-07-22 16:44:54,242 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 11 times [2022-07-22 16:44:54,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:54,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272854294] [2022-07-22 16:44:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:54,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:54,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:54,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773054221] [2022-07-22 16:44:54,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 16:44:54,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:54,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:54,249 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) [2022-07-22 16:44:54,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 16:44:55,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-22 16:44:55,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:44:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 16:44:55,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-22 16:44:55,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:55,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:55,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272854294] [2022-07-22 16:44:55,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:55,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773054221] [2022-07-22 16:44:55,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773054221] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:55,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:55,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-22 16:44:55,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439114597] [2022-07-22 16:44:55,973 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:55,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 16:44:55,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 16:44:55,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-07-22 16:44:55,974 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 13 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) [2022-07-22 16:44:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:56,284 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-07-22 16:44:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 16:44:56,284 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 13 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 92 [2022-07-22 16:44:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:56,285 INFO L225 Difference]: With dead ends: 65 [2022-07-22 16:44:56,285 INFO L226 Difference]: Without dead ends: 60 [2022-07-22 16:44:56,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-07-22 16:44:56,286 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:56,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 359 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 16:44:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-22 16:44:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-22 16:44:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 16:44:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-07-22 16:44:56,293 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 92 [2022-07-22 16:44:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:56,293 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-07-22 16:44:56,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 13 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) [2022-07-22 16:44:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-07-22 16:44:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 16:44:56,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:56,294 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:56,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 16:44:56,500 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,SelfDestructingSolverStorable13 [2022-07-22 16:44:56,501 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:56,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:56,501 INFO L85 PathProgramCache]: Analyzing trace with hash 550859009, now seen corresponding path program 12 times [2022-07-22 16:44:56,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:56,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093175291] [2022-07-22 16:44:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:56,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:56,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:56,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047700459] [2022-07-22 16:44:56,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 16:44:56,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:56,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:56,514 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) [2022-07-22 16:44:56,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 16:44:56,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-22 16:44:56,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:44:56,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 16:44:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-07-22 16:44:57,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:57,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:57,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093175291] [2022-07-22 16:44:57,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:57,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047700459] [2022-07-22 16:44:57,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047700459] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:57,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:57,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-22 16:44:57,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946907651] [2022-07-22 16:44:57,291 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:57,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 16:44:57,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:57,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 16:44:57,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-22 16:44:57,292 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 14 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) [2022-07-22 16:44:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:57,637 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-07-22 16:44:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 16:44:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 14 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 99 [2022-07-22 16:44:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:57,638 INFO L225 Difference]: With dead ends: 68 [2022-07-22 16:44:57,638 INFO L226 Difference]: Without dead ends: 63 [2022-07-22 16:44:57,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-07-22 16:44:57,639 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:57,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 399 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 16:44:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-22 16:44:57,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-22 16:44:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 15 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 16:44:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-07-22 16:44:57,647 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 99 [2022-07-22 16:44:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:57,647 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-07-22 16:44:57,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 14 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) [2022-07-22 16:44:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-07-22 16:44:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 16:44:57,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:57,649 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:57,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-22 16:44:57,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:57,854 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:44:57,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:44:57,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1794064584, now seen corresponding path program 13 times [2022-07-22 16:44:57,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:44:57,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808234760] [2022-07-22 16:44:57,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:44:57,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:44:57,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:44:57,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098128279] [2022-07-22 16:44:57,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 16:44:57,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:44:57,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:44:57,864 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) [2022-07-22 16:44:57,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 16:44:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:44:59,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 16:44:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:44:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 28 proven. 273 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-22 16:44:59,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:44:59,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:59,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808234760] [2022-07-22 16:44:59,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098128279] [2022-07-22 16:44:59,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098128279] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:44:59,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:44:59,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-22 16:44:59,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304677989] [2022-07-22 16:44:59,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:59,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 16:44:59,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:59,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 16:44:59,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-07-22 16:44:59,421 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 16:44:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:44:59,814 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-07-22 16:44:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 16:44:59,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 106 [2022-07-22 16:44:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:44:59,815 INFO L225 Difference]: With dead ends: 71 [2022-07-22 16:44:59,815 INFO L226 Difference]: Without dead ends: 66 [2022-07-22 16:44:59,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-07-22 16:44:59,815 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:44:59,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 441 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 16:44:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-22 16:44:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-22 16:44:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 16:44:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-07-22 16:44:59,823 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 106 [2022-07-22 16:44:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:44:59,823 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-07-22 16:44:59,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 16:44:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-07-22 16:44:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 16:44:59,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:44:59,824 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:44:59,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 16:45:00,029 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,SelfDestructingSolverStorable15 [2022-07-22 16:45:00,029 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:00,030 INFO L85 PathProgramCache]: Analyzing trace with hash -444443359, now seen corresponding path program 14 times [2022-07-22 16:45:00,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:00,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537486560] [2022-07-22 16:45:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:00,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:00,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547886502] [2022-07-22 16:45:00,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:45:00,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:00,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:00,037 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) [2022-07-22 16:45:00,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 16:45:01,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:45:01,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:45:01,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-22 16:45:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:45:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-22 16:45:01,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:45:01,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537486560] [2022-07-22 16:45:01,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547886502] [2022-07-22 16:45:01,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547886502] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:45:01,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:45:01,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-22 16:45:01,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031658184] [2022-07-22 16:45:01,713 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:01,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 16:45:01,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 16:45:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-22 16:45:01,714 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 16:45:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:02,141 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2022-07-22 16:45:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 16:45:02,141 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 113 [2022-07-22 16:45:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:02,142 INFO L225 Difference]: With dead ends: 74 [2022-07-22 16:45:02,142 INFO L226 Difference]: Without dead ends: 69 [2022-07-22 16:45:02,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-07-22 16:45:02,143 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:02,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 485 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 16:45:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-22 16:45:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-22 16:45:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 16:45:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-07-22 16:45:02,150 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 113 [2022-07-22 16:45:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:02,150 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-07-22 16:45:02,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 16:45:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-07-22 16:45:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 16:45:02,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:02,151 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:02,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 16:45:02,356 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,SelfDestructingSolverStorable16 [2022-07-22 16:45:02,357 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash -16713960, now seen corresponding path program 15 times [2022-07-22 16:45:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:02,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358413139] [2022-07-22 16:45:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:02,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:02,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:02,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106984264] [2022-07-22 16:45:02,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:45:02,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:02,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:02,364 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) [2022-07-22 16:45:02,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 16:45:02,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-22 16:45:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:45:02,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-22 16:45:02,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:45:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-22 16:45:03,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:45:03,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:03,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358413139] [2022-07-22 16:45:03,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:03,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106984264] [2022-07-22 16:45:03,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106984264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:45:03,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:45:03,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-07-22 16:45:03,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797115903] [2022-07-22 16:45:03,160 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:03,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 16:45:03,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:03,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 16:45:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-07-22 16:45:03,162 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 16:45:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:03,668 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-07-22 16:45:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 16:45:03,669 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 120 [2022-07-22 16:45:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:03,669 INFO L225 Difference]: With dead ends: 77 [2022-07-22 16:45:03,669 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 16:45:03,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-07-22 16:45:03,670 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:03,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 531 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 16:45:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 16:45:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-22 16:45:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-22 16:45:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-07-22 16:45:03,677 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 120 [2022-07-22 16:45:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:03,677 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-07-22 16:45:03,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 16:45:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-07-22 16:45:03,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-22 16:45:03,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:03,678 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:03,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 16:45:03,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 16:45:03,886 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:03,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1287814847, now seen corresponding path program 16 times [2022-07-22 16:45:03,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:03,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292935408] [2022-07-22 16:45:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:03,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:03,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:03,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156572092] [2022-07-22 16:45:03,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:45:03,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:03,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:03,898 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:45:03,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 16:45:04,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:45:04,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:45:04,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-22 16:45:04,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:45:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-22 16:45:05,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:45:05,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:05,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292935408] [2022-07-22 16:45:05,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:05,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156572092] [2022-07-22 16:45:05,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156572092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:45:05,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:45:05,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-07-22 16:45:05,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160806296] [2022-07-22 16:45:05,374 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:05,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 16:45:05,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 16:45:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-07-22 16:45:05,375 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-22 16:45:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:05,885 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-07-22 16:45:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 16:45:05,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 127 [2022-07-22 16:45:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:05,886 INFO L225 Difference]: With dead ends: 80 [2022-07-22 16:45:05,886 INFO L226 Difference]: Without dead ends: 75 [2022-07-22 16:45:05,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-07-22 16:45:05,887 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:05,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 579 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 16:45:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-22 16:45:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-22 16:45:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 16:45:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-07-22 16:45:05,894 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 127 [2022-07-22 16:45:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:05,894 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-07-22 16:45:05,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-22 16:45:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-07-22 16:45:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-22 16:45:05,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:05,897 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:05,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-22 16:45:06,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:06,102 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:06,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:06,102 INFO L85 PathProgramCache]: Analyzing trace with hash 146925304, now seen corresponding path program 17 times [2022-07-22 16:45:06,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:06,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855825096] [2022-07-22 16:45:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:06,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:06,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:06,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606247148] [2022-07-22 16:45:06,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 16:45:06,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:06,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:06,109 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:45:06,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 16:45:07,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-22 16:45:07,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:45:07,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-22 16:45:07,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:45:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-22 16:45:07,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:45:07,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:07,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855825096] [2022-07-22 16:45:07,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:07,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606247148] [2022-07-22 16:45:07,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606247148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:45:07,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:45:07,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-22 16:45:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063938083] [2022-07-22 16:45:07,892 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:07,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 16:45:07,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 16:45:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-07-22 16:45:07,893 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 16:45:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:08,490 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-07-22 16:45:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 16:45:08,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 134 [2022-07-22 16:45:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:08,492 INFO L225 Difference]: With dead ends: 83 [2022-07-22 16:45:08,492 INFO L226 Difference]: Without dead ends: 78 [2022-07-22 16:45:08,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-07-22 16:45:08,493 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:08,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 629 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 16:45:08,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-22 16:45:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-22 16:45:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-22 16:45:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2022-07-22 16:45:08,500 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 134 [2022-07-22 16:45:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:08,500 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2022-07-22 16:45:08,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 16:45:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2022-07-22 16:45:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-22 16:45:08,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:08,501 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:08,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 16:45:08,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:08,707 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:08,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1332278625, now seen corresponding path program 18 times [2022-07-22 16:45:08,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:08,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535140410] [2022-07-22 16:45:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:08,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:08,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:08,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724706170] [2022-07-22 16:45:08,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 16:45:08,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:08,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:08,714 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:45:08,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 16:45:09,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-22 16:45:09,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:45:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 16:45:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:45:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-07-22 16:45:10,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:45:10,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535140410] [2022-07-22 16:45:10,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724706170] [2022-07-22 16:45:10,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724706170] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:45:10,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:45:10,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-07-22 16:45:10,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186289768] [2022-07-22 16:45:10,390 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:10,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 16:45:10,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 16:45:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-07-22 16:45:10,390 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-22 16:45:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:10,982 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2022-07-22 16:45:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 16:45:10,983 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 141 [2022-07-22 16:45:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:10,984 INFO L225 Difference]: With dead ends: 86 [2022-07-22 16:45:10,984 INFO L226 Difference]: Without dead ends: 81 [2022-07-22 16:45:10,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-07-22 16:45:10,985 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:10,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 681 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 16:45:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-22 16:45:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-22 16:45:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-22 16:45:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2022-07-22 16:45:10,992 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 141 [2022-07-22 16:45:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:10,992 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2022-07-22 16:45:10,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 20 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-22 16:45:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2022-07-22 16:45:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-22 16:45:10,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:10,993 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:11,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-22 16:45:11,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-22 16:45:11,199 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:11,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:11,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2058456792, now seen corresponding path program 19 times [2022-07-22 16:45:11,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:11,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694741289] [2022-07-22 16:45:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:11,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:11,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:11,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138284846] [2022-07-22 16:45:11,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 16:45:11,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:11,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:11,207 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:45:11,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 16:45:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:45:12,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-22 16:45:12,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:45:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-07-22 16:45:12,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:45:12,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:12,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694741289] [2022-07-22 16:45:12,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:12,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138284846] [2022-07-22 16:45:12,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138284846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:45:12,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:45:12,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-22 16:45:12,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142438146] [2022-07-22 16:45:12,761 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:12,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 16:45:12,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:12,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 16:45:12,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-07-22 16:45:12,762 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-22 16:45:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:13,450 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2022-07-22 16:45:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 16:45:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 148 [2022-07-22 16:45:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:13,453 INFO L225 Difference]: With dead ends: 89 [2022-07-22 16:45:13,453 INFO L226 Difference]: Without dead ends: 84 [2022-07-22 16:45:13,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-07-22 16:45:13,453 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:13,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 735 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 16:45:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-22 16:45:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-22 16:45:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-22 16:45:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-07-22 16:45:13,466 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 148 [2022-07-22 16:45:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:13,467 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-07-22 16:45:13,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-22 16:45:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-07-22 16:45:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-22 16:45:13,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:13,470 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:13,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 16:45:13,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 16:45:13,675 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1810280833, now seen corresponding path program 20 times [2022-07-22 16:45:13,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:13,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595872718] [2022-07-22 16:45:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:13,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:13,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:13,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12720373] [2022-07-22 16:45:13,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:45:13,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:13,682 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:45:13,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 16:45:14,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:45:14,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:45:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-22 16:45:14,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:45:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-07-22 16:45:14,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:45:15,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:15,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595872718] [2022-07-22 16:45:15,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:15,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12720373] [2022-07-22 16:45:15,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12720373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:45:15,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:45:15,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-07-22 16:45:15,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96833568] [2022-07-22 16:45:15,169 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:15,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 16:45:15,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 16:45:15,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-07-22 16:45:15,170 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-22 16:45:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:15,901 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2022-07-22 16:45:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 16:45:15,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 155 [2022-07-22 16:45:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:15,902 INFO L225 Difference]: With dead ends: 92 [2022-07-22 16:45:15,902 INFO L226 Difference]: Without dead ends: 87 [2022-07-22 16:45:15,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-07-22 16:45:15,903 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:15,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 791 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 16:45:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-22 16:45:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-22 16:45:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 23 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-22 16:45:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2022-07-22 16:45:15,910 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 155 [2022-07-22 16:45:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:15,910 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2022-07-22 16:45:15,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-22 16:45:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2022-07-22 16:45:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-22 16:45:15,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:15,911 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:15,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 16:45:16,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:16,117 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash 548269752, now seen corresponding path program 21 times [2022-07-22 16:45:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:16,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403045584] [2022-07-22 16:45:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:16,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:16,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:16,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954478854] [2022-07-22 16:45:16,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:45:16,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:16,125 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:45:16,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 16:45:16,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-22 16:45:16,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:45:16,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-22 16:45:16,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:45:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-07-22 16:45:17,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:45:17,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:17,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403045584] [2022-07-22 16:45:17,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:17,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954478854] [2022-07-22 16:45:17,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954478854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:45:17,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:45:17,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-07-22 16:45:17,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778179377] [2022-07-22 16:45:17,596 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:17,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 16:45:17,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:17,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 16:45:17,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-07-22 16:45:17,597 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 23 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-22 16:45:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:18,341 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-07-22 16:45:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 16:45:18,342 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 23 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 162 [2022-07-22 16:45:18,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:18,343 INFO L225 Difference]: With dead ends: 95 [2022-07-22 16:45:18,343 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 16:45:18,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-07-22 16:45:18,343 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 2 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:18,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 849 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 16:45:18,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 16:45:18,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-22 16:45:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 24 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 16:45:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-07-22 16:45:18,351 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 162 [2022-07-22 16:45:18,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:18,352 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-07-22 16:45:18,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 23 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-22 16:45:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-07-22 16:45:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-22 16:45:18,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:18,353 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:18,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-22 16:45:18,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:18,559 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:18,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash -954681951, now seen corresponding path program 22 times [2022-07-22 16:45:18,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:18,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181299629] [2022-07-22 16:45:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:18,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:18,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:18,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095624483] [2022-07-22 16:45:18,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:45:18,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:18,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:18,566 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:45:18,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 16:45:19,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:45:19,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:45:19,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-22 16:45:19,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:45:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-07-22 16:45:19,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:45:19,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:45:19,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181299629] [2022-07-22 16:45:19,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:45:19,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095624483] [2022-07-22 16:45:19,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095624483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:45:19,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:45:19,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-07-22 16:45:19,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159365597] [2022-07-22 16:45:19,756 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:45:19,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 16:45:19,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:45:19,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 16:45:19,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-07-22 16:45:19,757 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 16:45:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:45:20,567 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2022-07-22 16:45:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 16:45:20,568 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 169 [2022-07-22 16:45:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:45:20,569 INFO L225 Difference]: With dead ends: 98 [2022-07-22 16:45:20,569 INFO L226 Difference]: Without dead ends: 93 [2022-07-22 16:45:20,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 16:45:20,570 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 2 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 16:45:20,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 909 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 16:45:20,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-22 16:45:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-22 16:45:20,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-22 16:45:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2022-07-22 16:45:20,578 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 169 [2022-07-22 16:45:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:45:20,578 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2022-07-22 16:45:20,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-22 16:45:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2022-07-22 16:45:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-22 16:45:20,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:45:20,579 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:45:20,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-22 16:45:20,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-22 16:45:20,785 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:45:20,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:45:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1441462632, now seen corresponding path program 23 times [2022-07-22 16:45:20,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:45:20,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887276791] [2022-07-22 16:45:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:45:20,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:45:20,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:45:20,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61147003] [2022-07-22 16:45:20,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 16:45:20,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:45:20,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:45:20,794 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:45:20,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 16:47:19,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-22 16:47:19,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:47:19,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-22 16:47:19,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:47:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-07-22 16:47:19,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:47:20,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:47:20,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887276791] [2022-07-22 16:47:20,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:47:20,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61147003] [2022-07-22 16:47:20,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61147003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:47:20,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:47:20,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-07-22 16:47:20,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469438283] [2022-07-22 16:47:20,127 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:47:20,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 16:47:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:47:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 16:47:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-07-22 16:47:20,129 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-22 16:47:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:47:21,097 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2022-07-22 16:47:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 16:47:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 176 [2022-07-22 16:47:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:47:21,099 INFO L225 Difference]: With dead ends: 101 [2022-07-22 16:47:21,099 INFO L226 Difference]: Without dead ends: 96 [2022-07-22 16:47:21,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 16:47:21,099 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 2 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 16:47:21,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 971 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 16:47:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-22 16:47:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-07-22 16:47:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-22 16:47:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-07-22 16:47:21,109 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 176 [2022-07-22 16:47:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:47:21,110 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-07-22 16:47:21,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-22 16:47:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-07-22 16:47:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-22 16:47:21,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:47:21,111 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:47:21,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-22 16:47:21,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 16:47:21,319 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:47:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:47:21,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1273037249, now seen corresponding path program 24 times [2022-07-22 16:47:21,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:47:21,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969671051] [2022-07-22 16:47:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:47:21,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:47:21,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:47:21,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394052478] [2022-07-22 16:47:21,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 16:47:21,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:47:21,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:47:21,331 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:47:21,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 16:47:22,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-07-22 16:47:22,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:47:22,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-22 16:47:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:47:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-07-22 16:47:23,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:47:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:47:25,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969671051] [2022-07-22 16:47:25,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:47:25,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394052478] [2022-07-22 16:47:25,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394052478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:47:25,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:47:25,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-07-22 16:47:25,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191767010] [2022-07-22 16:47:25,170 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:47:25,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 16:47:25,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:47:25,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 16:47:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 16:47:25,172 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-22 16:47:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:47:26,285 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2022-07-22 16:47:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 16:47:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 183 [2022-07-22 16:47:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:47:26,286 INFO L225 Difference]: With dead ends: 104 [2022-07-22 16:47:26,286 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 16:47:26,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=702, Invalid=2604, Unknown=0, NotChecked=0, Total=3306 [2022-07-22 16:47:26,288 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 2 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:47:26,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1035 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 16:47:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 16:47:26,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-22 16:47:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 27 states have call successors, (27), 4 states have call predecessors, (27), 3 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-22 16:47:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2022-07-22 16:47:26,297 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 183 [2022-07-22 16:47:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:47:26,298 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2022-07-22 16:47:26,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-22 16:47:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2022-07-22 16:47:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-07-22 16:47:26,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:47:26,299 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:47:26,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-22 16:47:26,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 16:47:26,507 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:47:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:47:26,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1983588744, now seen corresponding path program 25 times [2022-07-22 16:47:26,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:47:26,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798968453] [2022-07-22 16:47:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:47:26,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:47:26,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:47:26,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635351196] [2022-07-22 16:47:26,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 16:47:26,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:47:26,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:47:26,515 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:47:26,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 16:47:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:47:27,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-22 16:47:27,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:47:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-07-22 16:47:27,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:47:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:47:28,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798968453] [2022-07-22 16:47:28,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:47:28,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635351196] [2022-07-22 16:47:28,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635351196] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:47:28,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:47:28,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-07-22 16:47:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270515429] [2022-07-22 16:47:28,018 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:47:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 16:47:28,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:47:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 16:47:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 16:47:28,019 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-22 16:47:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:47:29,113 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2022-07-22 16:47:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 16:47:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 190 [2022-07-22 16:47:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:47:29,114 INFO L225 Difference]: With dead ends: 107 [2022-07-22 16:47:29,114 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 16:47:29,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 16:47:29,115 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 2 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:47:29,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1101 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 16:47:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 16:47:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-07-22 16:47:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 28 states have call successors, (28), 4 states have call predecessors, (28), 3 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-07-22 16:47:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-07-22 16:47:29,125 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 190 [2022-07-22 16:47:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:47:29,125 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-07-22 16:47:29,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-22 16:47:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-07-22 16:47:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-22 16:47:29,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:47:29,126 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:47:29,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-22 16:47:29,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 16:47:29,333 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:47:29,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:47:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash 832673249, now seen corresponding path program 26 times [2022-07-22 16:47:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:47:29,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32229361] [2022-07-22 16:47:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:47:29,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:47:29,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:47:29,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286280499] [2022-07-22 16:47:29,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:47:29,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:47:29,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:47:29,347 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:47:29,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-22 16:47:30,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:47:30,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:47:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-22 16:47:30,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:47:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-07-22 16:47:30,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:47:31,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:47:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32229361] [2022-07-22 16:47:31,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:47:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286280499] [2022-07-22 16:47:31,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286280499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:47:31,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:47:31,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-07-22 16:47:31,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516986352] [2022-07-22 16:47:31,015 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:47:31,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 16:47:31,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:47:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 16:47:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 16:47:31,017 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-07-22 16:47:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:47:32,200 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2022-07-22 16:47:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 16:47:32,200 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 197 [2022-07-22 16:47:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:47:32,201 INFO L225 Difference]: With dead ends: 110 [2022-07-22 16:47:32,201 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 16:47:32,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 16:47:32,202 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 2 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 2499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 2499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:47:32,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1169 Invalid, 2499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2499 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 16:47:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 16:47:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-22 16:47:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 29 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-22 16:47:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 130 transitions. [2022-07-22 16:47:32,212 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 130 transitions. Word has length 197 [2022-07-22 16:47:32,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:47:32,212 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 130 transitions. [2022-07-22 16:47:32,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-07-22 16:47:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 130 transitions. [2022-07-22 16:47:32,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-22 16:47:32,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:47:32,213 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:47:32,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-22 16:47:32,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 16:47:32,421 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:47:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:47:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash -702849448, now seen corresponding path program 27 times [2022-07-22 16:47:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:47:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972196760] [2022-07-22 16:47:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:47:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:47:32,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:47:32,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356092659] [2022-07-22 16:47:32,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:47:32,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:47:32,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:47:32,430 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:47:32,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-22 16:47:36,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-07-22 16:47:36,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:47:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-22 16:47:36,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:47:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-07-22 16:47:36,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:47:37,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:47:37,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972196760] [2022-07-22 16:47:37,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:47:37,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356092659] [2022-07-22 16:47:37,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356092659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:47:37,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:47:37,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-07-22 16:47:37,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192873628] [2022-07-22 16:47:37,177 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:47:37,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 16:47:37,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:47:37,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 16:47:37,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 16:47:37,178 INFO L87 Difference]: Start difference. First operand 105 states and 130 transitions. Second operand has 33 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-22 16:47:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:47:38,424 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2022-07-22 16:47:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 16:47:38,424 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 204 [2022-07-22 16:47:38,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:47:38,425 INFO L225 Difference]: With dead ends: 113 [2022-07-22 16:47:38,425 INFO L226 Difference]: Without dead ends: 108 [2022-07-22 16:47:38,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 16:47:38,426 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 2 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 2675 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 2675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 16:47:38,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1239 Invalid, 2675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2675 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 16:47:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-22 16:47:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-07-22 16:47:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 30 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-22 16:47:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2022-07-22 16:47:38,437 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 204 [2022-07-22 16:47:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:47:38,437 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2022-07-22 16:47:38,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-22 16:47:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2022-07-22 16:47:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-22 16:47:38,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:47:38,438 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:47:38,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-22 16:47:38,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:47:38,647 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:47:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:47:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash 473723393, now seen corresponding path program 28 times [2022-07-22 16:47:38,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:47:38,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059960132] [2022-07-22 16:47:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:47:38,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:47:38,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:47:38,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132313933] [2022-07-22 16:47:38,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:47:38,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:47:38,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:47:38,658 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:47:38,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-22 16:47:39,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:47:39,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:47:39,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-22 16:47:39,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:47:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-07-22 16:47:39,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:47:40,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:47:40,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059960132] [2022-07-22 16:47:40,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:47:40,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132313933] [2022-07-22 16:47:40,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132313933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:47:40,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:47:40,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-07-22 16:47:40,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959227574] [2022-07-22 16:47:40,129 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:47:40,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 16:47:40,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:47:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 16:47:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 16:47:40,130 INFO L87 Difference]: Start difference. First operand 108 states and 134 transitions. Second operand has 34 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-22 16:47:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:47:41,458 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2022-07-22 16:47:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 16:47:41,458 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 211 [2022-07-22 16:47:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:47:41,459 INFO L225 Difference]: With dead ends: 116 [2022-07-22 16:47:41,459 INFO L226 Difference]: Without dead ends: 111 [2022-07-22 16:47:41,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 16:47:41,460 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 2 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 2857 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 2857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:47:41,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1311 Invalid, 2857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2857 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 16:47:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-22 16:47:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-07-22 16:47:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 31 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-22 16:47:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2022-07-22 16:47:41,471 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 211 [2022-07-22 16:47:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:47:41,471 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2022-07-22 16:47:41,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-22 16:47:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2022-07-22 16:47:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-22 16:47:41,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:47:41,473 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:47:41,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-22 16:47:41,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-22 16:47:41,679 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:47:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:47:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash 687251000, now seen corresponding path program 29 times [2022-07-22 16:47:41,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:47:41,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965956220] [2022-07-22 16:47:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:47:41,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:47:41,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:47:41,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379314003] [2022-07-22 16:47:41,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 16:47:41,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:47:41,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:47:41,688 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:47:41,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-22 16:47:48,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-07-22 16:47:48,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:47:48,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 124 conjunts are in the unsatisfiable core [2022-07-22 16:47:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:47:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-07-22 16:47:48,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:47:48,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:47:48,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965956220] [2022-07-22 16:47:48,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:47:48,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379314003] [2022-07-22 16:47:48,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379314003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:47:48,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:47:48,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-07-22 16:47:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486453723] [2022-07-22 16:47:48,900 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:47:48,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 16:47:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:47:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 16:47:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 16:47:48,902 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-22 16:47:50,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:47:50,272 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2022-07-22 16:47:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 16:47:50,273 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 218 [2022-07-22 16:47:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:47:50,273 INFO L225 Difference]: With dead ends: 119 [2022-07-22 16:47:50,274 INFO L226 Difference]: Without dead ends: 114 [2022-07-22 16:47:50,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 16:47:50,274 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 2 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 3045 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:47:50,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1385 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3045 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 16:47:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-22 16:47:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-07-22 16:47:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 32 states have call successors, (32), 4 states have call predecessors, (32), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-22 16:47:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-07-22 16:47:50,290 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 218 [2022-07-22 16:47:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:47:50,290 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-07-22 16:47:50,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-22 16:47:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-07-22 16:47:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-22 16:47:50,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:47:50,291 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:47:50,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-22 16:47:50,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:47:50,492 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:47:50,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:47:50,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1007916577, now seen corresponding path program 30 times [2022-07-22 16:47:50,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:47:50,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588961755] [2022-07-22 16:47:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:47:50,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:47:50,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:47:50,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542889060] [2022-07-22 16:47:50,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 16:47:50,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:47:50,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:47:50,501 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:47:50,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-22 16:48:06,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-07-22 16:48:06,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:48:06,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 128 conjunts are in the unsatisfiable core [2022-07-22 16:48:06,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:48:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-07-22 16:48:06,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:48:07,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:48:07,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588961755] [2022-07-22 16:48:07,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:48:07,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542889060] [2022-07-22 16:48:07,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542889060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:48:07,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:48:07,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-07-22 16:48:07,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487584628] [2022-07-22 16:48:07,163 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:48:07,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-22 16:48:07,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:48:07,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-22 16:48:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 16:48:07,164 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-22 16:48:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:48:08,650 INFO L93 Difference]: Finished difference Result 122 states and 151 transitions. [2022-07-22 16:48:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 16:48:08,651 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 225 [2022-07-22 16:48:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:48:08,652 INFO L225 Difference]: With dead ends: 122 [2022-07-22 16:48:08,652 INFO L226 Difference]: Without dead ends: 117 [2022-07-22 16:48:08,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 16:48:08,653 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 2 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 3239 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 3239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:48:08,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1461 Invalid, 3239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3239 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 16:48:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-22 16:48:08,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-22 16:48:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 33 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-22 16:48:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2022-07-22 16:48:08,664 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 225 [2022-07-22 16:48:08,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:48:08,665 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2022-07-22 16:48:08,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-07-22 16:48:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2022-07-22 16:48:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-22 16:48:08,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:48:08,666 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:48:08,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-22 16:48:08,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:48:08,876 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:48:08,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:48:08,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2142541336, now seen corresponding path program 31 times [2022-07-22 16:48:08,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:48:08,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141521552] [2022-07-22 16:48:08,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:48:08,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:48:08,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:48:08,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687568434] [2022-07-22 16:48:08,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 16:48:08,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:48:08,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:48:08,885 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:48:08,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-22 16:48:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:48:09,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-22 16:48:09,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:48:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-07-22 16:48:10,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:48:10,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:48:10,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141521552] [2022-07-22 16:48:10,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:48:10,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687568434] [2022-07-22 16:48:10,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687568434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:48:10,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:48:10,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-07-22 16:48:10,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344590474] [2022-07-22 16:48:10,658 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:48:10,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-22 16:48:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:48:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-22 16:48:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 16:48:10,659 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand has 37 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 33 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-22 16:48:12,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:48:12,213 INFO L93 Difference]: Finished difference Result 125 states and 155 transitions. [2022-07-22 16:48:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 16:48:12,214 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 33 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 232 [2022-07-22 16:48:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:48:12,215 INFO L225 Difference]: With dead ends: 125 [2022-07-22 16:48:12,215 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 16:48:12,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 16:48:12,215 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 2 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 3439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 16:48:12,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1539 Invalid, 3439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3439 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 16:48:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 16:48:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-22 16:48:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 34 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 16:48:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 150 transitions. [2022-07-22 16:48:12,227 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 150 transitions. Word has length 232 [2022-07-22 16:48:12,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:48:12,227 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 150 transitions. [2022-07-22 16:48:12,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 33 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-22 16:48:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 150 transitions. [2022-07-22 16:48:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-22 16:48:12,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:48:12,228 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:48:12,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-22 16:48:12,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-22 16:48:12,436 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:48:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:48:12,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1846084161, now seen corresponding path program 32 times [2022-07-22 16:48:12,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:48:12,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119428160] [2022-07-22 16:48:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:48:12,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:48:12,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:48:12,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824842911] [2022-07-22 16:48:12,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:48:12,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:48:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:48:12,446 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:48:12,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-22 16:48:13,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:48:13,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:48:13,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 136 conjunts are in the unsatisfiable core [2022-07-22 16:48:13,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:48:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-07-22 16:48:14,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:48:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:48:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119428160] [2022-07-22 16:48:14,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:48:14,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824842911] [2022-07-22 16:48:14,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824842911] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:48:14,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:48:14,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-07-22 16:48:14,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104957739] [2022-07-22 16:48:14,383 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:48:14,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 16:48:14,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:48:14,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 16:48:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 16:48:14,384 INFO L87 Difference]: Start difference. First operand 120 states and 150 transitions. Second operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 16:48:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:48:16,030 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2022-07-22 16:48:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 16:48:16,030 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 239 [2022-07-22 16:48:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:48:16,031 INFO L225 Difference]: With dead ends: 128 [2022-07-22 16:48:16,031 INFO L226 Difference]: Without dead ends: 123 [2022-07-22 16:48:16,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 16:48:16,032 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 2 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 3645 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 3645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 16:48:16,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1619 Invalid, 3645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3645 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 16:48:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-22 16:48:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-07-22 16:48:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 35 states have call successors, (35), 4 states have call predecessors, (35), 3 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-22 16:48:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2022-07-22 16:48:16,044 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 239 [2022-07-22 16:48:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:48:16,044 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2022-07-22 16:48:16,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 16:48:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2022-07-22 16:48:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-22 16:48:16,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:48:16,046 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:48:16,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-22 16:48:16,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-22 16:48:16,252 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:48:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:48:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash 456345080, now seen corresponding path program 33 times [2022-07-22 16:48:16,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:48:16,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325605198] [2022-07-22 16:48:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:48:16,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:48:16,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:48:16,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532112847] [2022-07-22 16:48:16,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:48:16,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:48:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:48:16,277 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:48:16,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-22 16:48:17,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-07-22 16:48:17,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:48:17,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 140 conjunts are in the unsatisfiable core [2022-07-22 16:48:17,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:48:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-07-22 16:48:18,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:48:18,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:48:18,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325605198] [2022-07-22 16:48:18,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:48:18,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532112847] [2022-07-22 16:48:18,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532112847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:48:18,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:48:18,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-07-22 16:48:18,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568341745] [2022-07-22 16:48:18,768 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:48:18,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 16:48:18,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:48:18,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 16:48:18,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 16:48:18,769 INFO L87 Difference]: Start difference. First operand 123 states and 154 transitions. Second operand has 39 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-22 16:48:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:48:20,547 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2022-07-22 16:48:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 16:48:20,548 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 246 [2022-07-22 16:48:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:48:20,551 INFO L225 Difference]: With dead ends: 131 [2022-07-22 16:48:20,552 INFO L226 Difference]: Without dead ends: 126 [2022-07-22 16:48:20,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 16:48:20,552 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 2 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 3857 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 16:48:20,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1701 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3857 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 16:48:20,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-22 16:48:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-07-22 16:48:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 36 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 16:48:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-07-22 16:48:20,573 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 246 [2022-07-22 16:48:20,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:48:20,573 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-07-22 16:48:20,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 38 states have internal predecessors, (78), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-22 16:48:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-07-22 16:48:20,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-22 16:48:20,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:48:20,575 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:48:20,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-22 16:48:20,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-22 16:48:20,783 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:48:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:48:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1535030881, now seen corresponding path program 34 times [2022-07-22 16:48:20,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:48:20,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420749688] [2022-07-22 16:48:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:48:20,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:48:20,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:48:20,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201553587] [2022-07-22 16:48:20,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:48:20,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:48:20,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:48:20,792 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:48:20,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-22 16:48:22,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:48:22,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:48:22,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-22 16:48:22,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:48:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-07-22 16:48:23,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:48:23,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:48:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420749688] [2022-07-22 16:48:23,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:48:23,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201553587] [2022-07-22 16:48:23,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201553587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:48:23,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:48:23,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-07-22 16:48:23,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385448317] [2022-07-22 16:48:23,373 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:48:23,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 16:48:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:48:23,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 16:48:23,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 16:48:23,375 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand has 40 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 16:48:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:48:25,195 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2022-07-22 16:48:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 16:48:25,196 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 253 [2022-07-22 16:48:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:48:25,196 INFO L225 Difference]: With dead ends: 134 [2022-07-22 16:48:25,196 INFO L226 Difference]: Without dead ends: 129 [2022-07-22 16:48:25,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 16:48:25,197 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 1669 mSDsCounter, 0 mSdLazyCounter, 4075 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 4075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 16:48:25,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1785 Invalid, 4075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4075 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 16:48:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-22 16:48:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-22 16:48:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 37 states have call successors, (37), 4 states have call predecessors, (37), 3 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-22 16:48:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 162 transitions. [2022-07-22 16:48:25,209 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 162 transitions. Word has length 253 [2022-07-22 16:48:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:48:25,210 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 162 transitions. [2022-07-22 16:48:25,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 16:48:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 162 transitions. [2022-07-22 16:48:25,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-22 16:48:25,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:48:25,211 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:48:25,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-22 16:48:25,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:48:25,420 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:48:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:48:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1607511512, now seen corresponding path program 35 times [2022-07-22 16:48:25,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:48:25,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556061145] [2022-07-22 16:48:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:48:25,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:48:25,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:48:25,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687019536] [2022-07-22 16:48:25,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 16:48:25,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:48:25,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:48:25,429 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:48:25,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-22 16:48:53,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-07-22 16:48:53,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:48:53,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 148 conjunts are in the unsatisfiable core [2022-07-22 16:48:53,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:48:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-07-22 16:48:54,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:48:54,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:48:54,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556061145] [2022-07-22 16:48:54,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:48:54,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687019536] [2022-07-22 16:48:54,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687019536] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:48:54,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:48:54,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-07-22 16:48:54,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521666411] [2022-07-22 16:48:54,983 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:48:54,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 16:48:54,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:48:54,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 16:48:54,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 16:48:54,985 INFO L87 Difference]: Start difference. First operand 129 states and 162 transitions. Second operand has 41 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-22 16:48:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:48:56,925 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2022-07-22 16:48:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 16:48:56,926 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 260 [2022-07-22 16:48:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:48:56,926 INFO L225 Difference]: With dead ends: 137 [2022-07-22 16:48:56,926 INFO L226 Difference]: Without dead ends: 132 [2022-07-22 16:48:56,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 16:48:56,927 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 4299 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 4299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 16:48:56,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1871 Invalid, 4299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4299 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 16:48:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-22 16:48:56,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-22 16:48:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 38 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-22 16:48:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2022-07-22 16:48:56,940 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 260 [2022-07-22 16:48:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:48:56,940 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2022-07-22 16:48:56,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.05) internal successors, (82), 40 states have internal predecessors, (82), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-07-22 16:48:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2022-07-22 16:48:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-07-22 16:48:56,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:48:56,941 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:48:56,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-22 16:48:57,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-22 16:48:57,163 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:48:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:48:57,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1705594239, now seen corresponding path program 36 times [2022-07-22 16:48:57,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:48:57,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465456054] [2022-07-22 16:48:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:48:57,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:48:57,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:48:57,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583801230] [2022-07-22 16:48:57,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 16:48:57,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:48:57,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:48:57,172 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:48:57,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process