./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/egcd3-ll_unwindbound5.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 da2855a3b9d79ea31d743c942a3327e8ed25edbd ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 05:59:25,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 05:59:25,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 05:59:25,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 05:59:25,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 05:59:25,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 05:59:25,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 05:59:25,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 05:59:25,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 05:59:25,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 05:59:25,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 05:59:25,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 05:59:25,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 05:59:25,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 05:59:25,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 05:59:25,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 05:59:25,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 05:59:25,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 05:59:25,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 05:59:25,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 05:59:25,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 05:59:25,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 05:59:25,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 05:59:25,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 05:59:25,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 05:59:25,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 05:59:25,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 05:59:25,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 05:59:25,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 05:59:25,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 05:59:25,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 05:59:25,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 05:59:25,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 05:59:25,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 05:59:25,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 05:59:25,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 05:59:25,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 05:59:25,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 05:59:25,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 05:59:25,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 05:59:25,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 05:59:25,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 05:59:25,739 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 05:59:25,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 05:59:25,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 05:59:25,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 05:59:25,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 05:59:25,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 05:59:25,741 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 05:59:25,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 05:59:25,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 05:59:25,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 05:59:25,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 05:59:25,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 05:59:25,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 05:59:25,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 05:59:25,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 05:59:25,743 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 05:59:25,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 05:59:25,743 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 05:59:25,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 05:59:25,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 05:59:25,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 05:59:25,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 05:59:25,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:59:25,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 05:59:25,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 05:59:25,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 05:59:25,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 05:59:25,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 05:59:25,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 05:59:25,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 05:59:25,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da2855a3b9d79ea31d743c942a3327e8ed25edbd [2021-08-26 05:59:25,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 05:59:25,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 05:59:25,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 05:59:25,986 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 05:59:25,986 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 05:59:25,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-08-26 05:59:26,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8375a2a4d/d9e5306dea0e4714927a14f601b0bf27/FLAGd277f783a [2021-08-26 05:59:26,422 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 05:59:26,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2021-08-26 05:59:26,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8375a2a4d/d9e5306dea0e4714927a14f601b0bf27/FLAGd277f783a [2021-08-26 05:59:26,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8375a2a4d/d9e5306dea0e4714927a14f601b0bf27 [2021-08-26 05:59:26,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 05:59:26,862 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 05:59:26,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 05:59:26,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 05:59:26,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 05:59:26,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:59:26" (1/1) ... [2021-08-26 05:59:26,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26750d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:26, skipping insertion in model container [2021-08-26 05:59:26,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:59:26" (1/1) ... [2021-08-26 05:59:26,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 05:59:26,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 05:59:26,963 WARN L228 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/egcd3-ll_unwindbound5.c[490,503] [2021-08-26 05:59:26,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:59:26,980 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 05:59:26,987 WARN L228 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/egcd3-ll_unwindbound5.c[490,503] [2021-08-26 05:59:26,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:59:27,026 INFO L208 MainTranslator]: Completed translation [2021-08-26 05:59:27,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27 WrapperNode [2021-08-26 05:59:27,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 05:59:27,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 05:59:27,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 05:59:27,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 05:59:27,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (1/1) ... [2021-08-26 05:59:27,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (1/1) ... [2021-08-26 05:59:27,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 05:59:27,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 05:59:27,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 05:59:27,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 05:59:27,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (1/1) ... [2021-08-26 05:59:27,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (1/1) ... [2021-08-26 05:59:27,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (1/1) ... [2021-08-26 05:59:27,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (1/1) ... [2021-08-26 05:59:27,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (1/1) ... [2021-08-26 05:59:27,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (1/1) ... [2021-08-26 05:59:27,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (1/1) ... [2021-08-26 05:59:27,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 05:59:27,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 05:59:27,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 05:59:27,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 05:59:27,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (1/1) ... [2021-08-26 05:59:27,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:59:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:27,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 05:59:27,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 05:59:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 05:59:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 05:59:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 05:59:27,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 05:59:27,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 05:59:27,395 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-08-26 05:59:27,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:59:27 BoogieIcfgContainer [2021-08-26 05:59:27,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 05:59:27,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 05:59:27,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 05:59:27,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 05:59:27,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:59:26" (1/3) ... [2021-08-26 05:59:27,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721439fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:59:27, skipping insertion in model container [2021-08-26 05:59:27,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:59:27" (2/3) ... [2021-08-26 05:59:27,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721439fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:59:27, skipping insertion in model container [2021-08-26 05:59:27,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:59:27" (3/3) ... [2021-08-26 05:59:27,406 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2021-08-26 05:59:27,409 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 05:59:27,409 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-08-26 05:59:27,452 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 05:59:27,456 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 05:59:27,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-26 05:59:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 39 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:27,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 05:59:27,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:27,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:27,469 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:27,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:27,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1233339761, now seen corresponding path program 1 times [2021-08-26 05:59:27,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:27,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778668033] [2021-08-26 05:59:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:27,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:27,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:27,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778668033] [2021-08-26 05:59:27,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778668033] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:59:27,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:59:27,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 05:59:27,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441494720] [2021-08-26 05:59:27,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 05:59:27,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 05:59:27,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 05:59:27,595 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 39 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:27,609 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2021-08-26 05:59:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 05:59:27,611 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-26 05:59:27,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:27,616 INFO L225 Difference]: With dead ends: 77 [2021-08-26 05:59:27,616 INFO L226 Difference]: Without dead ends: 36 [2021-08-26 05:59:27,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 05:59:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-26 05:59:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-26 05:59:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-08-26 05:59:27,637 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 10 [2021-08-26 05:59:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:27,638 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-08-26 05:59:27,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-08-26 05:59:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 05:59:27,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:27,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:27,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 05:59:27,639 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:27,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1507359540, now seen corresponding path program 1 times [2021-08-26 05:59:27,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:27,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621111971] [2021-08-26 05:59:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:27,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:27,666 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:27,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636367240] [2021-08-26 05:59:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:27,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:27,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:27,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:27,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 05:59:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:27,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 05:59:27,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:27,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:27,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621111971] [2021-08-26 05:59:27,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:27,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636367240] [2021-08-26 05:59:27,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636367240] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:59:27,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:59:27,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 05:59:27,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722485878] [2021-08-26 05:59:27,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:59:27,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:27,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:59:27,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:59:27,840 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:27,857 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-08-26 05:59:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 05:59:27,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 05:59:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:27,858 INFO L225 Difference]: With dead ends: 42 [2021-08-26 05:59:27,858 INFO L226 Difference]: Without dead ends: 38 [2021-08-26 05:59:27,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:59:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-26 05:59:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-26 05:59:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-08-26 05:59:27,862 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2021-08-26 05:59:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:27,862 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-08-26 05:59:27,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-08-26 05:59:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 05:59:27,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:27,863 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:27,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 05:59:28,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:28,080 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:28,081 INFO L82 PathProgramCache]: Analyzing trace with hash 515746917, now seen corresponding path program 1 times [2021-08-26 05:59:28,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:28,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605129999] [2021-08-26 05:59:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:28,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:28,094 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:28,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364462575] [2021-08-26 05:59:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:28,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:28,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:28,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:28,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 05:59:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:28,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:59:28,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:28,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:28,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605129999] [2021-08-26 05:59:28,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:28,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364462575] [2021-08-26 05:59:28,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364462575] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:59:28,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:59:28,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 05:59:28,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567239109] [2021-08-26 05:59:28,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:59:28,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:28,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:59:28,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:59:28,292 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:28,387 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-08-26 05:59:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:59:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 05:59:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:28,389 INFO L225 Difference]: With dead ends: 66 [2021-08-26 05:59:28,389 INFO L226 Difference]: Without dead ends: 62 [2021-08-26 05:59:28,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:59:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-26 05:59:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2021-08-26 05:59:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-08-26 05:59:28,393 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 12 [2021-08-26 05:59:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:28,393 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-08-26 05:59:28,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-08-26 05:59:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 05:59:28,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:28,394 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:28,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:28,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 05:59:28,601 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:28,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1270616931, now seen corresponding path program 1 times [2021-08-26 05:59:28,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:28,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308959516] [2021-08-26 05:59:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:28,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:28,618 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:28,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280274652] [2021-08-26 05:59:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:28,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:28,619 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:28,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 05:59:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:28,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 05:59:28,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:29,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:29,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308959516] [2021-08-26 05:59:29,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:29,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280274652] [2021-08-26 05:59:29,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280274652] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:59:29,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:59:29,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 05:59:29,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535450512] [2021-08-26 05:59:29,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:59:29,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:59:29,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:59:29,007 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:29,138 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-08-26 05:59:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:59:29,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 05:59:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:29,139 INFO L225 Difference]: With dead ends: 62 [2021-08-26 05:59:29,139 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 05:59:29,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:59:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 05:59:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-08-26 05:59:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-08-26 05:59:29,143 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 16 [2021-08-26 05:59:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:29,144 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-08-26 05:59:29,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-08-26 05:59:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 05:59:29,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:29,144 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:29,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:29,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:29,365 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash -648504839, now seen corresponding path program 1 times [2021-08-26 05:59:29,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:29,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150893901] [2021-08-26 05:59:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:29,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:29,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:29,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160915132] [2021-08-26 05:59:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:29,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:29,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:29,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:29,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 05:59:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:29,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 05:59:29,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:29,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:29,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150893901] [2021-08-26 05:59:29,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:29,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160915132] [2021-08-26 05:59:29,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160915132] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:59:29,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:59:29,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:59:29,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705712100] [2021-08-26 05:59:29,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:59:29,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:29,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:59:29,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:59:29,535 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:29,555 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-08-26 05:59:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:59:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 05:59:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:29,564 INFO L225 Difference]: With dead ends: 85 [2021-08-26 05:59:29,565 INFO L226 Difference]: Without dead ends: 55 [2021-08-26 05:59:29,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:59:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-26 05:59:29,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-26 05:59:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.34) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-08-26 05:59:29,576 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 17 [2021-08-26 05:59:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:29,576 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-08-26 05:59:29,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-08-26 05:59:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:59:29,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:29,578 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:29,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:29,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:29,783 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:29,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1354097033, now seen corresponding path program 1 times [2021-08-26 05:59:29,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:29,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671285116] [2021-08-26 05:59:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:29,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:29,794 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:29,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208925212] [2021-08-26 05:59:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:29,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:29,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:29,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:29,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 05:59:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:29,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:59:29,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:29,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:29,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671285116] [2021-08-26 05:59:29,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:29,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208925212] [2021-08-26 05:59:29,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208925212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:29,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:29,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:59:29,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016721458] [2021-08-26 05:59:29,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:59:29,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:29,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:59:29,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:59:29,962 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:29,989 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-08-26 05:59:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:59:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 05:59:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:29,990 INFO L225 Difference]: With dead ends: 64 [2021-08-26 05:59:29,990 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 05:59:29,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:59:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 05:59:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-08-26 05:59:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-08-26 05:59:30,006 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 18 [2021-08-26 05:59:30,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:30,007 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-08-26 05:59:30,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:30,007 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-08-26 05:59:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:59:30,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:30,008 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:30,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:30,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:30,213 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:30,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:30,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1292001664, now seen corresponding path program 1 times [2021-08-26 05:59:30,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:30,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991753377] [2021-08-26 05:59:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:30,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:30,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:30,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438453696] [2021-08-26 05:59:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:30,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:30,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:30,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:30,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 05:59:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:30,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 05:59:30,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:30,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:30,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991753377] [2021-08-26 05:59:30,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:30,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438453696] [2021-08-26 05:59:30,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438453696] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:59:30,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:59:30,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 05:59:30,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822677659] [2021-08-26 05:59:30,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:59:30,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:59:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:59:30,568 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:30,807 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-08-26 05:59:30,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:59:30,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 05:59:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:30,808 INFO L225 Difference]: With dead ends: 82 [2021-08-26 05:59:30,808 INFO L226 Difference]: Without dead ends: 80 [2021-08-26 05:59:30,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-08-26 05:59:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-26 05:59:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2021-08-26 05:59:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-08-26 05:59:30,812 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 18 [2021-08-26 05:59:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:30,812 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-08-26 05:59:30,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-08-26 05:59:30,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 05:59:30,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:30,813 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:30,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:31,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:31,029 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash 971917338, now seen corresponding path program 1 times [2021-08-26 05:59:31,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:31,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491895281] [2021-08-26 05:59:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:31,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:31,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:31,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744270856] [2021-08-26 05:59:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:31,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:31,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:31,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 05:59:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:31,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:59:31,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:31,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:31,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491895281] [2021-08-26 05:59:31,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:31,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744270856] [2021-08-26 05:59:31,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744270856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:31,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:31,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:59:31,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707269107] [2021-08-26 05:59:31,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:59:31,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:31,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:59:31,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:59:31,237 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:31,372 INFO L93 Difference]: Finished difference Result 191 states and 227 transitions. [2021-08-26 05:59:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:59:31,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-26 05:59:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:31,373 INFO L225 Difference]: With dead ends: 191 [2021-08-26 05:59:31,373 INFO L226 Difference]: Without dead ends: 187 [2021-08-26 05:59:31,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-26 05:59:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-26 05:59:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 91. [2021-08-26 05:59:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 90 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2021-08-26 05:59:31,387 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 19 [2021-08-26 05:59:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:31,387 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2021-08-26 05:59:31,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2021-08-26 05:59:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 05:59:31,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:31,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:31,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-26 05:59:31,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:31,607 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:31,607 INFO L82 PathProgramCache]: Analyzing trace with hash -367893245, now seen corresponding path program 1 times [2021-08-26 05:59:31,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:31,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938393856] [2021-08-26 05:59:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:31,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:31,619 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:31,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313871299] [2021-08-26 05:59:31,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:31,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:31,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:31,620 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:31,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 05:59:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 05:59:31,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:31,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:31,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938393856] [2021-08-26 05:59:31,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:31,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313871299] [2021-08-26 05:59:31,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313871299] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:59:31,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:59:31,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 05:59:31,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483221542] [2021-08-26 05:59:31,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:59:31,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:31,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:59:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:59:31,904 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:32,021 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2021-08-26 05:59:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:59:32,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-26 05:59:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:32,022 INFO L225 Difference]: With dead ends: 111 [2021-08-26 05:59:32,022 INFO L226 Difference]: Without dead ends: 109 [2021-08-26 05:59:32,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:59:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-26 05:59:32,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2021-08-26 05:59:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.375) internal successors, (132), 100 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2021-08-26 05:59:32,027 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 20 [2021-08-26 05:59:32,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:32,027 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2021-08-26 05:59:32,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:32,027 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2021-08-26 05:59:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 05:59:32,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:32,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:32,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:32,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-26 05:59:32,245 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1357932506, now seen corresponding path program 1 times [2021-08-26 05:59:32,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:32,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560226077] [2021-08-26 05:59:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:32,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:32,253 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:32,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045478355] [2021-08-26 05:59:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:32,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:32,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:32,254 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) [2021-08-26 05:59:32,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 05:59:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:32,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:59:32,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:32,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:32,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560226077] [2021-08-26 05:59:32,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:32,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045478355] [2021-08-26 05:59:32,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045478355] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:59:32,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:59:32,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:59:32,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008198870] [2021-08-26 05:59:32,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:59:32,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:32,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:59:32,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:59:32,477 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:32,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:32,533 INFO L93 Difference]: Finished difference Result 226 states and 307 transitions. [2021-08-26 05:59:32,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:59:32,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-26 05:59:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:32,535 INFO L225 Difference]: With dead ends: 226 [2021-08-26 05:59:32,535 INFO L226 Difference]: Without dead ends: 224 [2021-08-26 05:59:32,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:59:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-26 05:59:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2021-08-26 05:59:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.356060606060606) internal successors, (179), 136 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2021-08-26 05:59:32,543 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 22 [2021-08-26 05:59:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:32,544 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2021-08-26 05:59:32,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2021-08-26 05:59:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 05:59:32,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:32,546 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:32,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:32,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 05:59:32,761 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:32,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1235592658, now seen corresponding path program 1 times [2021-08-26 05:59:32,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:32,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204335732] [2021-08-26 05:59:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:32,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:32,768 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:32,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864871180] [2021-08-26 05:59:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:32,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:32,769 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) [2021-08-26 05:59:32,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 05:59:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 05:59:32,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:33,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:33,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204335732] [2021-08-26 05:59:33,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:33,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864871180] [2021-08-26 05:59:33,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864871180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:33,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:33,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:59:33,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517666243] [2021-08-26 05:59:33,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:59:33,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:33,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:59:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:59:33,157 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:33,243 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2021-08-26 05:59:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 05:59:33,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-26 05:59:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:33,244 INFO L225 Difference]: With dead ends: 210 [2021-08-26 05:59:33,244 INFO L226 Difference]: Without dead ends: 208 [2021-08-26 05:59:33,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:59:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-26 05:59:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2021-08-26 05:59:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.381720430107527) internal successors, (257), 190 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2021-08-26 05:59:33,252 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 23 [2021-08-26 05:59:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:33,252 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2021-08-26 05:59:33,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2021-08-26 05:59:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 05:59:33,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:33,253 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:33,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:33,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-26 05:59:33,464 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:33,465 INFO L82 PathProgramCache]: Analyzing trace with hash -138249927, now seen corresponding path program 1 times [2021-08-26 05:59:33,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:33,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647965208] [2021-08-26 05:59:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:33,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:33,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:33,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657839537] [2021-08-26 05:59:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:33,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:33,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:33,497 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) [2021-08-26 05:59:33,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 05:59:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:33,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:59:33,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:33,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:33,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647965208] [2021-08-26 05:59:33,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:33,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657839537] [2021-08-26 05:59:33,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657839537] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:59:33,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:59:33,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 05:59:33,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626243210] [2021-08-26 05:59:33,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:59:33,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:33,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:59:33,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:59:33,717 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:33,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:33,748 INFO L93 Difference]: Finished difference Result 280 states and 375 transitions. [2021-08-26 05:59:33,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:59:33,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-26 05:59:33,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:33,749 INFO L225 Difference]: With dead ends: 280 [2021-08-26 05:59:33,749 INFO L226 Difference]: Without dead ends: 191 [2021-08-26 05:59:33,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:59:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-26 05:59:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-08-26 05:59:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.3763440860215055) internal successors, (256), 190 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2021-08-26 05:59:33,760 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 23 [2021-08-26 05:59:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:33,760 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2021-08-26 05:59:33,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2021-08-26 05:59:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 05:59:33,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:33,762 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:33,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:33,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 05:59:33,977 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash -265418908, now seen corresponding path program 1 times [2021-08-26 05:59:33,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:33,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780009374] [2021-08-26 05:59:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:33,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:33,984 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:33,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341888864] [2021-08-26 05:59:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:33,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:33,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:33,986 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) [2021-08-26 05:59:33,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 05:59:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:34,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:59:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:34,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:34,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780009374] [2021-08-26 05:59:34,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:34,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341888864] [2021-08-26 05:59:34,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341888864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:34,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:34,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:59:34,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752031648] [2021-08-26 05:59:34,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:59:34,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:59:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:59:34,224 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:34,255 INFO L93 Difference]: Finished difference Result 303 states and 411 transitions. [2021-08-26 05:59:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 05:59:34,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-26 05:59:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:34,256 INFO L225 Difference]: With dead ends: 303 [2021-08-26 05:59:34,256 INFO L226 Difference]: Without dead ends: 196 [2021-08-26 05:59:34,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:59:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-26 05:59:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-08-26 05:59:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.368421052631579) internal successors, (260), 194 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 260 transitions. [2021-08-26 05:59:34,265 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 260 transitions. Word has length 24 [2021-08-26 05:59:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:34,265 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 260 transitions. [2021-08-26 05:59:34,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 260 transitions. [2021-08-26 05:59:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 05:59:34,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:34,266 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:34,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:34,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 05:59:34,485 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:34,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1931632236, now seen corresponding path program 2 times [2021-08-26 05:59:34,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:34,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666703419] [2021-08-26 05:59:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:34,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:34,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:34,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837759660] [2021-08-26 05:59:34,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:59:34,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:34,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:34,492 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) [2021-08-26 05:59:34,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 05:59:34,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:59:34,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:59:34,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 05:59:34,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:34,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:34,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666703419] [2021-08-26 05:59:34,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:34,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837759660] [2021-08-26 05:59:34,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837759660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:34,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:34,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:59:34,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18119033] [2021-08-26 05:59:34,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:59:34,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:59:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:59:34,778 INFO L87 Difference]: Start difference. First operand 195 states and 260 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:34,813 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2021-08-26 05:59:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:59:34,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-26 05:59:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:34,814 INFO L225 Difference]: With dead ends: 223 [2021-08-26 05:59:34,814 INFO L226 Difference]: Without dead ends: 219 [2021-08-26 05:59:34,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:59:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-26 05:59:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2021-08-26 05:59:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.3604060913705585) internal successors, (268), 201 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 268 transitions. [2021-08-26 05:59:34,824 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 268 transitions. Word has length 25 [2021-08-26 05:59:34,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:34,824 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 268 transitions. [2021-08-26 05:59:34,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 268 transitions. [2021-08-26 05:59:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 05:59:34,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:34,825 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:34,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:35,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 05:59:35,041 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:35,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:35,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1993727605, now seen corresponding path program 1 times [2021-08-26 05:59:35,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:35,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480858782] [2021-08-26 05:59:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:35,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:35,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:35,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037246663] [2021-08-26 05:59:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:35,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:35,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:35,048 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) [2021-08-26 05:59:35,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 05:59:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:35,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-26 05:59:35,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:35,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:35,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480858782] [2021-08-26 05:59:35,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:35,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037246663] [2021-08-26 05:59:35,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037246663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:35,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:35,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:59:35,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507074911] [2021-08-26 05:59:35,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:59:35,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:35,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:59:35,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:59:35,486 INFO L87 Difference]: Start difference. First operand 202 states and 268 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:35,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:35,590 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2021-08-26 05:59:35,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 05:59:35,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-26 05:59:35,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:35,591 INFO L225 Difference]: With dead ends: 216 [2021-08-26 05:59:35,591 INFO L226 Difference]: Without dead ends: 214 [2021-08-26 05:59:35,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:59:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-26 05:59:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 202. [2021-08-26 05:59:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.350253807106599) internal successors, (266), 201 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2021-08-26 05:59:35,600 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 25 [2021-08-26 05:59:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:35,601 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2021-08-26 05:59:35,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:35,601 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2021-08-26 05:59:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 05:59:35,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:35,601 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:35,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:35,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:35,833 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:35,833 INFO L82 PathProgramCache]: Analyzing trace with hash 416971704, now seen corresponding path program 1 times [2021-08-26 05:59:35,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:35,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951458730] [2021-08-26 05:59:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:35,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:35,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:35,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961240175] [2021-08-26 05:59:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:35,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:35,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:35,850 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) [2021-08-26 05:59:35,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 05:59:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:36,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 05:59:36,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:36,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:36,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951458730] [2021-08-26 05:59:36,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:36,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961240175] [2021-08-26 05:59:36,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961240175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:36,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:36,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:59:36,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014985906] [2021-08-26 05:59:36,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:59:36,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:36,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:59:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:59:36,260 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:36,460 INFO L93 Difference]: Finished difference Result 336 states and 421 transitions. [2021-08-26 05:59:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:59:36,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-26 05:59:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:36,462 INFO L225 Difference]: With dead ends: 336 [2021-08-26 05:59:36,462 INFO L226 Difference]: Without dead ends: 334 [2021-08-26 05:59:36,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-08-26 05:59:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-26 05:59:36,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 243. [2021-08-26 05:59:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 242 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 321 transitions. [2021-08-26 05:59:36,472 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 321 transitions. Word has length 27 [2021-08-26 05:59:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:36,473 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 321 transitions. [2021-08-26 05:59:36,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 321 transitions. [2021-08-26 05:59:36,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 05:59:36,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:36,473 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:36,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:36,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 05:59:36,689 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:36,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1345328893, now seen corresponding path program 2 times [2021-08-26 05:59:36,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:36,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342168548] [2021-08-26 05:59:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:36,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:36,694 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:36,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340414984] [2021-08-26 05:59:36,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:59:36,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:36,696 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) [2021-08-26 05:59:36,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 05:59:36,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:59:36,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:59:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 05:59:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:37,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:37,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342168548] [2021-08-26 05:59:37,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:37,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340414984] [2021-08-26 05:59:37,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340414984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:37,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:37,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:59:37,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449379321] [2021-08-26 05:59:37,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:59:37,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:59:37,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:59:37,026 INFO L87 Difference]: Start difference. First operand 243 states and 321 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:37,061 INFO L93 Difference]: Finished difference Result 324 states and 424 transitions. [2021-08-26 05:59:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 05:59:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-26 05:59:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:37,062 INFO L225 Difference]: With dead ends: 324 [2021-08-26 05:59:37,062 INFO L226 Difference]: Without dead ends: 149 [2021-08-26 05:59:37,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:59:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-26 05:59:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 135. [2021-08-26 05:59:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 132 states have (on average 1.2121212121212122) internal successors, (160), 134 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 160 transitions. [2021-08-26 05:59:37,070 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 160 transitions. Word has length 30 [2021-08-26 05:59:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:37,070 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 160 transitions. [2021-08-26 05:59:37,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:37,070 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 160 transitions. [2021-08-26 05:59:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 05:59:37,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:37,071 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:37,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:37,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 05:59:37,288 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash -28513692, now seen corresponding path program 1 times [2021-08-26 05:59:37,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:37,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041239074] [2021-08-26 05:59:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:37,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:37,294 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:37,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594951967] [2021-08-26 05:59:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:37,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:37,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:37,300 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) [2021-08-26 05:59:37,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 05:59:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:37,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 05:59:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:37,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:37,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041239074] [2021-08-26 05:59:37,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:37,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594951967] [2021-08-26 05:59:37,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594951967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:37,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:37,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:59:37,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855970992] [2021-08-26 05:59:37,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:59:37,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:37,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:59:37,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:59:37,629 INFO L87 Difference]: Start difference. First operand 135 states and 160 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:37,687 INFO L93 Difference]: Finished difference Result 192 states and 228 transitions. [2021-08-26 05:59:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:59:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-26 05:59:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:37,688 INFO L225 Difference]: With dead ends: 192 [2021-08-26 05:59:37,688 INFO L226 Difference]: Without dead ends: 141 [2021-08-26 05:59:37,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:59:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-26 05:59:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2021-08-26 05:59:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 138 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 162 transitions. [2021-08-26 05:59:37,694 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 162 transitions. Word has length 30 [2021-08-26 05:59:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:37,695 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 162 transitions. [2021-08-26 05:59:37,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 162 transitions. [2021-08-26 05:59:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 05:59:37,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:37,695 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:37,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:37,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 05:59:37,912 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1158562919, now seen corresponding path program 2 times [2021-08-26 05:59:37,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:37,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103319107] [2021-08-26 05:59:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:37,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:37,918 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:37,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536417250] [2021-08-26 05:59:37,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:59:37,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:37,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:37,924 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) [2021-08-26 05:59:37,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 05:59:38,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:59:38,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:59:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 05:59:38,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 05:59:38,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:38,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103319107] [2021-08-26 05:59:38,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:38,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536417250] [2021-08-26 05:59:38,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536417250] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:59:38,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:59:38,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 05:59:38,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127896696] [2021-08-26 05:59:38,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:59:38,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:38,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:59:38,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:59:38,274 INFO L87 Difference]: Start difference. First operand 139 states and 162 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:38,351 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2021-08-26 05:59:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:59:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-26 05:59:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:38,353 INFO L225 Difference]: With dead ends: 159 [2021-08-26 05:59:38,353 INFO L226 Difference]: Without dead ends: 146 [2021-08-26 05:59:38,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:59:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-26 05:59:38,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 130. [2021-08-26 05:59:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.188976377952756) internal successors, (151), 129 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2021-08-26 05:59:38,361 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 31 [2021-08-26 05:59:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:38,361 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2021-08-26 05:59:38,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2021-08-26 05:59:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 05:59:38,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:38,362 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:38,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:38,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:38,577 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1302269029, now seen corresponding path program 1 times [2021-08-26 05:59:38,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:38,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350138626] [2021-08-26 05:59:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:38,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:38,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:38,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872799402] [2021-08-26 05:59:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:38,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:38,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:38,584 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) [2021-08-26 05:59:38,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 05:59:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:38,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 05:59:38,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:39,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:39,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350138626] [2021-08-26 05:59:39,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:39,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872799402] [2021-08-26 05:59:39,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872799402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:39,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:39,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:59:39,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778557005] [2021-08-26 05:59:39,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:59:39,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:39,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:59:39,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:59:39,098 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:39,345 INFO L93 Difference]: Finished difference Result 173 states and 198 transitions. [2021-08-26 05:59:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:59:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-26 05:59:39,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:39,346 INFO L225 Difference]: With dead ends: 173 [2021-08-26 05:59:39,346 INFO L226 Difference]: Without dead ends: 171 [2021-08-26 05:59:39,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-08-26 05:59:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-26 05:59:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 140. [2021-08-26 05:59:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 139 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 163 transitions. [2021-08-26 05:59:39,353 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 163 transitions. Word has length 32 [2021-08-26 05:59:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:39,354 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 163 transitions. [2021-08-26 05:59:39,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 163 transitions. [2021-08-26 05:59:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 05:59:39,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:39,354 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:39,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:39,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:39,569 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:39,570 INFO L82 PathProgramCache]: Analyzing trace with hash 885134474, now seen corresponding path program 1 times [2021-08-26 05:59:39,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:39,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645995423] [2021-08-26 05:59:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:39,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:39,575 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:39,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776348209] [2021-08-26 05:59:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:39,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:39,580 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) [2021-08-26 05:59:39,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 05:59:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:59:39,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-26 05:59:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:40,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:40,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645995423] [2021-08-26 05:59:40,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:40,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776348209] [2021-08-26 05:59:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776348209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:40,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:40,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 05:59:40,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987278471] [2021-08-26 05:59:40,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 05:59:40,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:40,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 05:59:40,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:59:40,727 INFO L87 Difference]: Start difference. First operand 140 states and 163 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:41,037 INFO L93 Difference]: Finished difference Result 195 states and 224 transitions. [2021-08-26 05:59:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:59:41,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-26 05:59:41,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:41,038 INFO L225 Difference]: With dead ends: 195 [2021-08-26 05:59:41,038 INFO L226 Difference]: Without dead ends: 189 [2021-08-26 05:59:41,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-26 05:59:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-26 05:59:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 158. [2021-08-26 05:59:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 155 states have (on average 1.1806451612903226) internal successors, (183), 157 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2021-08-26 05:59:41,046 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 33 [2021-08-26 05:59:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:41,047 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2021-08-26 05:59:41,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:41,047 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2021-08-26 05:59:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 05:59:41,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:41,047 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:41,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:41,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-26 05:59:41,270 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-08-26 05:59:41,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:41,270 INFO L82 PathProgramCache]: Analyzing trace with hash 731699348, now seen corresponding path program 1 times [2021-08-26 05:59:41,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:41,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811316515] [2021-08-26 05:59:41,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:41,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:41,276 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:41,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202047165] [2021-08-26 05:59:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:41,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:41,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:41,278 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) [2021-08-26 05:59:41,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 05:59:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 05:59:41,622 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 05:59:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 05:59:41,668 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 05:59:41,668 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 05:59:41,668 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:41,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:41,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:41,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:41,671 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:41,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:41,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-26 05:59:41,888 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 05:59:41,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:59:41 BoogieIcfgContainer [2021-08-26 05:59:41,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 05:59:41,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 05:59:41,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 05:59:41,937 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 05:59:41,938 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:59:27" (3/4) ... [2021-08-26 05:59:41,939 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 05:59:41,969 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 05:59:41,969 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 05:59:41,970 INFO L168 Benchmark]: Toolchain (without parser) took 15108.00 ms. Allocated memory was 67.1 MB in the beginning and 174.1 MB in the end (delta: 107.0 MB). Free memory was 46.7 MB in the beginning and 113.5 MB in the end (delta: -66.8 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:41,971 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 67.1 MB. Free memory was 48.8 MB in the beginning and 48.8 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:59:41,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.67 ms. Allocated memory is still 67.1 MB. Free memory was 46.5 MB in the beginning and 50.5 MB in the end (delta: -4.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:41,971 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.88 ms. Allocated memory is still 67.1 MB. Free memory was 50.5 MB in the beginning and 48.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:59:41,971 INFO L168 Benchmark]: Boogie Preprocessor took 20.41 ms. Allocated memory is still 67.1 MB. Free memory was 48.7 MB in the beginning and 47.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:59:41,971 INFO L168 Benchmark]: RCFGBuilder took 326.37 ms. Allocated memory is still 67.1 MB. Free memory was 47.6 MB in the beginning and 49.4 MB in the end (delta: -1.7 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:41,972 INFO L168 Benchmark]: TraceAbstraction took 14534.54 ms. Allocated memory was 67.1 MB in the beginning and 174.1 MB in the end (delta: 107.0 MB). Free memory was 48.8 MB in the beginning and 117.6 MB in the end (delta: -68.9 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:41,972 INFO L168 Benchmark]: Witness Printer took 32.25 ms. Allocated memory is still 174.1 MB. Free memory was 117.6 MB in the beginning and 113.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:41,973 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 67.1 MB. Free memory was 48.8 MB in the beginning and 48.8 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 167.67 ms. Allocated memory is still 67.1 MB. Free memory was 46.5 MB in the beginning and 50.5 MB in the end (delta: -4.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.88 ms. Allocated memory is still 67.1 MB. Free memory was 50.5 MB in the beginning and 48.7 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.41 ms. Allocated memory is still 67.1 MB. Free memory was 48.7 MB in the beginning and 47.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 326.37 ms. Allocated memory is still 67.1 MB. Free memory was 47.6 MB in the beginning and 49.4 MB in the end (delta: -1.7 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14534.54 ms. Allocated memory was 67.1 MB in the beginning and 174.1 MB in the end (delta: 107.0 MB). Free memory was 48.8 MB in the beginning and 117.6 MB in the end (delta: -68.9 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. * Witness Printer took 32.25 ms. Allocated memory is still 174.1 MB. Free memory was 117.6 MB in the beginning and 113.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=3] [L41] EXPR counter++ VAL [counter=4] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=4] [L48] EXPR counter++ VAL [counter=5] [L48] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L54] COND TRUE !(c >= 2 * v) VAL [counter=5] [L59] c = c - v [L60] k = k + d VAL [counter=5] [L41] EXPR counter++ VAL [counter=6] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND FALSE !(counter++<5) [L11] COND TRUE !(cond) VAL [counter=7] [L13] reach_error() VAL [counter=7] - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 14436.1ms, OverallIterations: 22, TraceHistogramMax: 4, EmptinessCheckTime: 17.1ms, AutomataDifference: 2136.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 842 SDtfs, 2078 SDslu, 2221 SDs, 0 SdLazy, 1351 SolverSat, 196 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 804.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 503 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1327.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=243occurred in iteration=16, InterpolantAutomatonStates: 164, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 161.1ms AutomataMinimizationTime, 21 MinimizatonAttempts, 475 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 152.2ms SsaConstructionTime, 347.2ms SatisfiabilityAnalysisTime, 3681.8ms InterpolantComputationTime, 504 NumberOfCodeBlocks, 504 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 445 ConstructedInterpolants, 0 QuantifiedInterpolants, 2567 SizeOfPredicates, 117 NumberOfNonLiveVariables, 2419 ConjunctsInSsa, 286 ConjunctsInUnsatCore, 21 InterpolantComputations, 10 PerfectInterpolantSequences, 62/124 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 05:59:42,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...