./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.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/prod4br-ll_unwindbound10.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 43051687c8aef7959ae28ac444cbd19e487fcbb5 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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 07:35:39,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 07:35:39,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 07:35:39,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 07:35:39,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 07:35:39,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 07:35:39,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 07:35:39,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 07:35:39,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 07:35:39,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 07:35:39,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 07:35:39,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 07:35:39,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 07:35:39,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 07:35:39,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 07:35:39,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 07:35:39,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 07:35:39,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 07:35:39,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 07:35:39,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 07:35:39,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 07:35:39,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 07:35:39,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 07:35:39,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 07:35:39,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 07:35:39,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 07:35:39,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 07:35:39,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 07:35:39,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 07:35:39,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 07:35:39,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 07:35:39,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 07:35:39,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 07:35:39,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 07:35:39,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 07:35:39,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 07:35:39,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 07:35:39,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 07:35:39,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 07:35:39,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 07:35:39,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 07:35:39,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 07:35:39,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 07:35:39,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 07:35:39,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 07:35:39,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 07:35:39,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 07:35:39,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 07:35:39,415 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 07:35:39,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 07:35:39,415 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 07:35:39,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 07:35:39,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 07:35:39,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 07:35:39,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 07:35:39,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 07:35:39,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 07:35:39,416 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 07:35:39,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 07:35:39,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 07:35:39,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 07:35:39,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 07:35:39,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 07:35:39,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 07:35:39,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:35:39,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 07:35:39,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 07:35:39,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 07:35:39,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 07:35:39,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 07:35:39,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 07:35:39,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 07:35:39,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43051687c8aef7959ae28ac444cbd19e487fcbb5 [2021-08-26 07:35:39,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 07:35:39,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 07:35:39,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 07:35:39,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 07:35:39,700 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 07:35:39,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2021-08-26 07:35:39,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/470aa890d/bb9c9a7bde9f49f9af04c234ce889596/FLAG147532921 [2021-08-26 07:35:40,158 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 07:35:40,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2021-08-26 07:35:40,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/470aa890d/bb9c9a7bde9f49f9af04c234ce889596/FLAG147532921 [2021-08-26 07:35:40,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/470aa890d/bb9c9a7bde9f49f9af04c234ce889596 [2021-08-26 07:35:40,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 07:35:40,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 07:35:40,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 07:35:40,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 07:35:40,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 07:35:40,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@80a3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40, skipping insertion in model container [2021-08-26 07:35:40,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 07:35:40,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 07:35:40,266 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/prod4br-ll_unwindbound10.c[524,537] [2021-08-26 07:35:40,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:35:40,281 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 07:35:40,288 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/prod4br-ll_unwindbound10.c[524,537] [2021-08-26 07:35:40,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:35:40,323 INFO L208 MainTranslator]: Completed translation [2021-08-26 07:35:40,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40 WrapperNode [2021-08-26 07:35:40,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 07:35:40,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 07:35:40,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 07:35:40,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 07:35:40,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 07:35:40,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 07:35:40,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 07:35:40,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 07:35:40,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 07:35:40,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 07:35:40,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 07:35:40,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 07:35:40,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (1/1) ... [2021-08-26 07:35:40,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:35:40,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:40,426 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 07:35:40,499 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 07:35:40,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 07:35:40,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 07:35:40,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 07:35:40,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 07:35:40,774 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 07:35:40,774 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-26 07:35:40,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:35:40 BoogieIcfgContainer [2021-08-26 07:35:40,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 07:35:40,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 07:35:40,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 07:35:40,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 07:35:40,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:35:40" (1/3) ... [2021-08-26 07:35:40,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105cd9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:35:40, skipping insertion in model container [2021-08-26 07:35:40,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:35:40" (2/3) ... [2021-08-26 07:35:40,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105cd9b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:35:40, skipping insertion in model container [2021-08-26 07:35:40,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:35:40" (3/3) ... [2021-08-26 07:35:40,781 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound10.c [2021-08-26 07:35:40,783 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 07:35:40,784 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 07:35:40,840 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 07:35:40,844 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 07:35:40,845 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 07:35:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 24 states have internal predecessors, (34), 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 07:35:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 07:35:40,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:40,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:40,860 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:40,864 INFO L82 PathProgramCache]: Analyzing trace with hash 120613195, now seen corresponding path program 1 times [2021-08-26 07:35:40,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:40,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609973202] [2021-08-26 07:35:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:40,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:40,968 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 07:35:40,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:40,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609973202] [2021-08-26 07:35:40,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609973202] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:40,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:40,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 07:35:40,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555740252] [2021-08-26 07:35:40,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 07:35:40,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:40,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 07:35:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:35:40,981 INFO L87 Difference]: Start difference. First operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 24 states have internal predecessors, (34), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 07:35:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:40,990 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-08-26 07:35:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 07:35:40,991 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-08-26 07:35:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:40,996 INFO L225 Difference]: With dead ends: 47 [2021-08-26 07:35:40,996 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 07:35:40,997 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 07:35:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 07:35:41,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-26 07:35:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 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 07:35:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-08-26 07:35:41,016 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2021-08-26 07:35:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:41,017 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-08-26 07:35:41,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 07:35:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-08-26 07:35:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 07:35:41,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:41,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:41,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 07:35:41,019 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:41,022 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-08-26 07:35:41,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:41,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460048966] [2021-08-26 07:35:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:41,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:41,050 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:41,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915257965] [2021-08-26 07:35:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:41,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:41,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:41,052 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 07:35:41,103 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 07:35:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 07:35:41,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:41,365 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 07:35:41,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:41,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460048966] [2021-08-26 07:35:41,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:41,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915257965] [2021-08-26 07:35:41,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915257965] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:41,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:41,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 07:35:41,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887587765] [2021-08-26 07:35:41,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:35:41,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:41,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:35:41,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:35:41,369 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:35:41,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:41,432 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-08-26 07:35:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:35:41,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-08-26 07:35:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:41,433 INFO L225 Difference]: With dead ends: 42 [2021-08-26 07:35:41,434 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 07:35:41,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:35:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 07:35:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2021-08-26 07:35:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 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 07:35:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-08-26 07:35:41,437 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2021-08-26 07:35:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:41,438 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-08-26 07:35:41,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 07:35:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-08-26 07:35:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 07:35:41,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:41,439 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:41,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 07:35:41,656 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 07:35:41,657 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1182850160, now seen corresponding path program 1 times [2021-08-26 07:35:41,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:41,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123792958] [2021-08-26 07:35:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:41,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:41,671 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:41,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010068637] [2021-08-26 07:35:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:41,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:41,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:41,675 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 07:35:41,676 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 07:35:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:41,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 07:35:41,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:41,778 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 07:35:41,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:41,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123792958] [2021-08-26 07:35:41,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:41,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010068637] [2021-08-26 07:35:41,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010068637] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:41,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:41,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 07:35:41,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305530723] [2021-08-26 07:35:41,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:35:41,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:41,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:35:41,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:35:41,781 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 07:35:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:41,792 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-08-26 07:35:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 07:35:41,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-08-26 07:35:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:41,793 INFO L225 Difference]: With dead ends: 32 [2021-08-26 07:35:41,793 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 07:35:41,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:35:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 07:35:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-26 07:35:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 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 07:35:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-08-26 07:35:41,795 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-08-26 07:35:41,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:41,796 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-08-26 07:35:41,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 07:35:41,796 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-08-26 07:35:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 07:35:41,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:41,797 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:41,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-26 07:35:42,028 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 07:35:42,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:42,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1415754199, now seen corresponding path program 1 times [2021-08-26 07:35:42,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:42,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301714808] [2021-08-26 07:35:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:42,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:42,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:42,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144635663] [2021-08-26 07:35:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:42,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:42,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:42,063 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 07:35:42,065 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 07:35:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:42,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 07:35:42,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:42,448 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 07:35:42,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:42,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301714808] [2021-08-26 07:35:42,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:42,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144635663] [2021-08-26 07:35:42,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144635663] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:42,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:42,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-26 07:35:42,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601612141] [2021-08-26 07:35:42,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 07:35:42,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:42,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 07:35:42,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:35:42,451 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 07:35:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:43,112 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-08-26 07:35:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:35:43,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 07:35:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:43,114 INFO L225 Difference]: With dead ends: 52 [2021-08-26 07:35:43,114 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 07:35:43,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 551.0ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-08-26 07:35:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 07:35:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2021-08-26 07:35:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 31 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 07:35:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-08-26 07:35:43,118 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 11 [2021-08-26 07:35:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:43,118 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-08-26 07:35:43,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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 07:35:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-08-26 07:35:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 07:35:43,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:43,119 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:43,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-26 07:35:43,328 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 07:35:43,329 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash 965004492, now seen corresponding path program 1 times [2021-08-26 07:35:43,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:43,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46908079] [2021-08-26 07:35:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:43,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:43,338 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:43,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8537476] [2021-08-26 07:35:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:43,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:43,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:43,339 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 07:35:43,340 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 07:35:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:43,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 07:35:43,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:43,461 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 07:35:43,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:43,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46908079] [2021-08-26 07:35:43,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:43,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8537476] [2021-08-26 07:35:43,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8537476] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:43,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:43,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 07:35:43,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597302081] [2021-08-26 07:35:43,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:35:43,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:43,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:35:43,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:35:43,466 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 07:35:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:43,571 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-08-26 07:35:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:35:43,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 13 [2021-08-26 07:35:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:43,572 INFO L225 Difference]: With dead ends: 57 [2021-08-26 07:35:43,573 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 07:35:43,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:35:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 07:35:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-08-26 07:35:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.457142857142857) internal successors, (51), 37 states have internal predecessors, (51), 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 07:35:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2021-08-26 07:35:43,576 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 13 [2021-08-26 07:35:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:43,577 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2021-08-26 07:35:43,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 07:35:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2021-08-26 07:35:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 07:35:43,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:43,577 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:43,595 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 07:35:43,791 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 07:35:43,791 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:43,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1005087291, now seen corresponding path program 1 times [2021-08-26 07:35:43,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:43,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633861236] [2021-08-26 07:35:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:43,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:43,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:43,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767899949] [2021-08-26 07:35:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:43,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:43,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:43,800 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 07:35:43,801 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 07:35:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:43,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 07:35:43,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:46,282 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 07:35:46,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:46,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633861236] [2021-08-26 07:35:46,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:46,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767899949] [2021-08-26 07:35:46,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767899949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:35:46,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:35:46,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 07:35:46,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005094305] [2021-08-26 07:35:46,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:35:46,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:46,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:35:46,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:35:46,283 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 07:35:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:46,605 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2021-08-26 07:35:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:35:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 13 [2021-08-26 07:35:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:46,606 INFO L225 Difference]: With dead ends: 68 [2021-08-26 07:35:46,606 INFO L226 Difference]: Without dead ends: 66 [2021-08-26 07:35:46,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-26 07:35:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-26 07:35:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2021-08-26 07:35:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.45) internal successors, (58), 42 states have internal predecessors, (58), 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 07:35:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-08-26 07:35:46,612 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 13 [2021-08-26 07:35:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:46,613 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-08-26 07:35:46,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 07:35:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-08-26 07:35:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 07:35:46,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:46,613 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:46,632 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 07:35:46,830 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 07:35:46,830 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1092907201, now seen corresponding path program 1 times [2021-08-26 07:35:46,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:46,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768859290] [2021-08-26 07:35:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:46,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:46,842 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:46,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505238890] [2021-08-26 07:35:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:46,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:46,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:46,846 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 07:35:46,847 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 07:35:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:46,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 07:35:46,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:46,956 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 07:35:46,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:46,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768859290] [2021-08-26 07:35:46,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:46,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505238890] [2021-08-26 07:35:46,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505238890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:35:46,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:35:46,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-26 07:35:46,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044933854] [2021-08-26 07:35:46,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:35:46,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:35:46,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:35:46,961 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 07:35:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:46,976 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-08-26 07:35:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:35:46,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2021-08-26 07:35:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:46,978 INFO L225 Difference]: With dead ends: 57 [2021-08-26 07:35:46,978 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 07:35:46,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:35:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 07:35:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-08-26 07:35:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 48 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 07:35:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2021-08-26 07:35:46,991 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 14 [2021-08-26 07:35:46,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:46,991 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2021-08-26 07:35:46,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 07:35:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2021-08-26 07:35:46,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 07:35:46,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:46,992 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:47,011 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 07:35:47,209 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 07:35:47,209 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:47,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1175899963, now seen corresponding path program 1 times [2021-08-26 07:35:47,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:47,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748075458] [2021-08-26 07:35:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:47,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:47,215 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:47,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802695968] [2021-08-26 07:35:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:47,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:47,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:47,219 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 07:35:47,220 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 07:35:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:47,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 07:35:47,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:47,448 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 07:35:47,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:47,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748075458] [2021-08-26 07:35:47,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:47,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802695968] [2021-08-26 07:35:47,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802695968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:35:47,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:35:47,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:35:47,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618825716] [2021-08-26 07:35:47,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:35:47,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:47,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:35:47,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:35:47,450 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 07:35:47,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:47,608 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2021-08-26 07:35:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:35:47,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-08-26 07:35:47,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:47,609 INFO L225 Difference]: With dead ends: 63 [2021-08-26 07:35:47,609 INFO L226 Difference]: Without dead ends: 61 [2021-08-26 07:35:47,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:35:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-26 07:35:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-08-26 07:35:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 49 states have internal predecessors, (66), 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 07:35:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2021-08-26 07:35:47,612 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 14 [2021-08-26 07:35:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:47,612 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2021-08-26 07:35:47,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 07:35:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2021-08-26 07:35:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 07:35:47,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:47,613 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:47,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 07:35:47,828 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 07:35:47,830 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:47,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:47,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2112377150, now seen corresponding path program 1 times [2021-08-26 07:35:47,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:47,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621013792] [2021-08-26 07:35:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:47,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:47,854 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:47,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621180224] [2021-08-26 07:35:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:47,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:47,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:47,873 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 07:35:47,905 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 07:35:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:48,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 07:35:48,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:48,177 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 07:35:48,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:48,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621013792] [2021-08-26 07:35:48,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:48,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621180224] [2021-08-26 07:35:48,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621180224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:35:48,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:35:48,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:35:48,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103172960] [2021-08-26 07:35:48,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:35:48,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:35:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:35:48,179 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 07:35:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:48,361 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2021-08-26 07:35:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:35:48,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2021-08-26 07:35:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:48,362 INFO L225 Difference]: With dead ends: 70 [2021-08-26 07:35:48,362 INFO L226 Difference]: Without dead ends: 68 [2021-08-26 07:35:48,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:35:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-26 07:35:48,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2021-08-26 07:35:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.38) internal successors, (69), 52 states have internal predecessors, (69), 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 07:35:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2021-08-26 07:35:48,366 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 15 [2021-08-26 07:35:48,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:48,366 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2021-08-26 07:35:48,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 07:35:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2021-08-26 07:35:48,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 07:35:48,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:48,366 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:48,390 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 07:35:48,567 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 07:35:48,567 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:48,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2114224192, now seen corresponding path program 1 times [2021-08-26 07:35:48,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:48,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093923828] [2021-08-26 07:35:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:48,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:48,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:48,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603265213] [2021-08-26 07:35:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:48,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:48,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:48,581 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 07:35:48,584 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 07:35:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:48,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 07:35:48,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:48,939 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 07:35:48,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:48,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093923828] [2021-08-26 07:35:48,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:48,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603265213] [2021-08-26 07:35:48,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603265213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:35:48,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:35:48,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 07:35:48,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406260230] [2021-08-26 07:35:48,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:35:48,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:35:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:35:48,940 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 07:35:49,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:49,196 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2021-08-26 07:35:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:35:49,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 15 [2021-08-26 07:35:49,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:49,197 INFO L225 Difference]: With dead ends: 71 [2021-08-26 07:35:49,197 INFO L226 Difference]: Without dead ends: 69 [2021-08-26 07:35:49,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:35:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-26 07:35:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2021-08-26 07:35:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 50 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 07:35:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2021-08-26 07:35:49,203 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 15 [2021-08-26 07:35:49,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:49,204 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2021-08-26 07:35:49,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 07:35:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2021-08-26 07:35:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 07:35:49,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:49,204 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:49,221 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 07:35:49,405 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 07:35:49,405 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:49,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1951591878, now seen corresponding path program 1 times [2021-08-26 07:35:49,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:49,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888004720] [2021-08-26 07:35:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:49,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:49,414 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:49,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586416462] [2021-08-26 07:35:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:49,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:49,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:49,441 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 07:35:49,484 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 07:35:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:49,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 07:35:49,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:49,752 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 07:35:49,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:49,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888004720] [2021-08-26 07:35:49,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:49,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586416462] [2021-08-26 07:35:49,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586416462] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:49,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:49,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 07:35:49,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725759667] [2021-08-26 07:35:49,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:35:49,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:35:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:35:49,753 INFO L87 Difference]: Start difference. First operand 51 states and 67 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 07:35:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:49,829 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-08-26 07:35:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:35:49,830 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 07:35:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:49,830 INFO L225 Difference]: With dead ends: 80 [2021-08-26 07:35:49,830 INFO L226 Difference]: Without dead ends: 76 [2021-08-26 07:35:49,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:35:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-26 07:35:49,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2021-08-26 07:35:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 54 states have internal predecessors, (73), 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 07:35:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-08-26 07:35:49,834 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 16 [2021-08-26 07:35:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:49,834 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-08-26 07:35:49,834 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 07:35:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-08-26 07:35:49,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 07:35:49,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:49,834 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:49,860 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 07:35:50,035 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 07:35:50,035 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:50,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1461153292, now seen corresponding path program 2 times [2021-08-26 07:35:50,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:50,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587041558] [2021-08-26 07:35:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:50,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:50,041 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:50,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733689696] [2021-08-26 07:35:50,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:35:50,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:50,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:50,055 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 07:35:50,056 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 07:35:50,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:35:50,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:35:50,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 07:35:50,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:54,194 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 07:35:54,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:54,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587041558] [2021-08-26 07:35:54,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:54,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733689696] [2021-08-26 07:35:54,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733689696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:35:54,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:35:54,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 07:35:54,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450398494] [2021-08-26 07:35:54,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 07:35:54,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:54,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 07:35:54,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:35:54,196 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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 07:35:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:35:54,792 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2021-08-26 07:35:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 07:35:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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 07:35:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:35:54,793 INFO L225 Difference]: With dead ends: 83 [2021-08-26 07:35:54,793 INFO L226 Difference]: Without dead ends: 81 [2021-08-26 07:35:54,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-26 07:35:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-26 07:35:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2021-08-26 07:35:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 59 states have internal predecessors, (80), 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 07:35:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2021-08-26 07:35:54,798 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 18 [2021-08-26 07:35:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:35:54,798 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2021-08-26 07:35:54,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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 07:35:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2021-08-26 07:35:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 07:35:54,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:35:54,799 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:35:54,817 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 07:35:54,999 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 07:35:54,999 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:35:55,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:35:55,000 INFO L82 PathProgramCache]: Analyzing trace with hash 38054995, now seen corresponding path program 1 times [2021-08-26 07:35:55,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:35:55,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505392935] [2021-08-26 07:35:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:55,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:35:55,006 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:35:55,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425615490] [2021-08-26 07:35:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:35:55,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:35:55,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:35:55,025 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 07:35:55,063 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 07:35:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:35:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 07:35:55,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:35:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 07:35:55,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:35:55,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505392935] [2021-08-26 07:35:55,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:35:55,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425615490] [2021-08-26 07:35:55,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425615490] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:35:55,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:35:55,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 07:35:55,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734876286] [2021-08-26 07:35:55,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:35:55,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:35:55,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:35:55,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:35:55,407 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 07:36:02,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:36:02,027 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2021-08-26 07:36:02,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:36:02,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 18 [2021-08-26 07:36:02,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:36:02,028 INFO L225 Difference]: With dead ends: 68 [2021-08-26 07:36:02,028 INFO L226 Difference]: Without dead ends: 64 [2021-08-26 07:36:02,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:36:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-26 07:36:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2021-08-26 07:36:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 48 states have internal predecessors, (62), 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 07:36:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2021-08-26 07:36:02,031 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 18 [2021-08-26 07:36:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:36:02,031 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2021-08-26 07:36:02,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 07:36:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2021-08-26 07:36:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 07:36:02,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:36:02,032 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:36:02,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-26 07:36:02,232 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 07:36:02,233 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:36:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:36:02,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1948915952, now seen corresponding path program 2 times [2021-08-26 07:36:02,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:36:02,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728160254] [2021-08-26 07:36:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:36:02,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:36:02,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:36:02,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294811531] [2021-08-26 07:36:02,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:36:02,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:36:02,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:36:02,245 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 07:36:02,246 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 07:36:02,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:36:02,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:36:02,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 07:36:02,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:36:02,466 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 07:36:02,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:36:02,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728160254] [2021-08-26 07:36:02,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:36:02,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294811531] [2021-08-26 07:36:02,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294811531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:36:02,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:36:02,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:36:02,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974153438] [2021-08-26 07:36:02,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:36:02,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:36:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:36:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:36:02,468 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 07:36:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:36:02,487 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2021-08-26 07:36:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 07:36:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 07:36:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:36:02,489 INFO L225 Difference]: With dead ends: 75 [2021-08-26 07:36:02,489 INFO L226 Difference]: Without dead ends: 67 [2021-08-26 07:36:02,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:36:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-26 07:36:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-08-26 07:36:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 60 states have internal predecessors, (79), 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 07:36:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2021-08-26 07:36:02,496 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 19 [2021-08-26 07:36:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:36:02,496 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2021-08-26 07:36:02,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 07:36:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2021-08-26 07:36:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 07:36:02,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:36:02,497 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:36:02,516 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 07:36:02,716 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 07:36:02,717 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:36:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:36:02,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1865923190, now seen corresponding path program 1 times [2021-08-26 07:36:02,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:36:02,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132841300] [2021-08-26 07:36:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:36:02,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:36:02,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:36:02,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723148852] [2021-08-26 07:36:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:36:02,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:36:02,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:36:02,735 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 07:36:02,744 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 07:36:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:36:02,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-26 07:36:02,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:36:05,702 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 07:36:05,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:36:05,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132841300] [2021-08-26 07:36:05,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:36:05,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723148852] [2021-08-26 07:36:05,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723148852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:36:05,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:36:05,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 07:36:05,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986201211] [2021-08-26 07:36:05,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 07:36:05,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:36:05,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 07:36:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-26 07:36:05,703 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 07:36:07,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:36:07,504 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2021-08-26 07:36:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 07:36:07,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 07:36:07,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:36:07,505 INFO L225 Difference]: With dead ends: 98 [2021-08-26 07:36:07,505 INFO L226 Difference]: Without dead ends: 73 [2021-08-26 07:36:07,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1554.2ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-26 07:36:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-26 07:36:07,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2021-08-26 07:36:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.34375) internal successors, (86), 66 states have internal predecessors, (86), 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 07:36:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-08-26 07:36:07,509 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 19 [2021-08-26 07:36:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:36:07,509 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-08-26 07:36:07,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 07:36:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-08-26 07:36:07,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 07:36:07,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:36:07,510 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:36:07,527 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 07:36:07,720 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 07:36:07,720 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:36:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:36:07,721 INFO L82 PathProgramCache]: Analyzing trace with hash -752867060, now seen corresponding path program 2 times [2021-08-26 07:36:07,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:36:07,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75379724] [2021-08-26 07:36:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:36:07,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:36:07,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:36:07,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80131622] [2021-08-26 07:36:07,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:36:07,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:36:07,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:36:07,728 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 07:36:07,729 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 07:36:07,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:36:07,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:36:07,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-26 07:36:07,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:36:23,615 WARN L207 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 34 [2021-08-26 07:36:46,029 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 07:36:46,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:36:46,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75379724] [2021-08-26 07:36:46,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:36:46,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80131622] [2021-08-26 07:36:46,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80131622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:36:46,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:36:46,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 07:36:46,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772155917] [2021-08-26 07:36:46,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 07:36:46,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:36:46,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 07:36:46,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-26 07:36:46,030 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 07:37:01,332 WARN L207 SmtUtils]: Spent 12.19 s on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-08-26 07:37:04,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:04,908 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2021-08-26 07:37:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 07:37:04,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 07:37:04,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:04,909 INFO L225 Difference]: With dead ends: 81 [2021-08-26 07:37:04,909 INFO L226 Difference]: Without dead ends: 79 [2021-08-26 07:37:04,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 19638.3ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-26 07:37:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-26 07:37:04,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-08-26 07:37:04,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.34375) internal successors, (86), 66 states have internal predecessors, (86), 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 07:37:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-08-26 07:37:04,912 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 19 [2021-08-26 07:37:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:04,913 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-08-26 07:37:04,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 07:37:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-08-26 07:37:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:37:04,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:04,915 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:04,934 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 07:37:05,124 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 07:37:05,125 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:05,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:05,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1919614381, now seen corresponding path program 1 times [2021-08-26 07:37:05,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:05,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030497487] [2021-08-26 07:37:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:05,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:05,133 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:05,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160977905] [2021-08-26 07:37:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:05,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:05,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:05,138 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 07:37:05,138 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 07:37:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:37:05,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 07:37:05,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:06,134 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 07:37:06,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:06,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030497487] [2021-08-26 07:37:06,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:06,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160977905] [2021-08-26 07:37:06,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160977905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:06,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:06,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 07:37:06,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142964838] [2021-08-26 07:37:06,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:37:06,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:37:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:37:06,137 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 07:37:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:06,930 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2021-08-26 07:37:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:37:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 07:37:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:06,931 INFO L225 Difference]: With dead ends: 90 [2021-08-26 07:37:06,931 INFO L226 Difference]: Without dead ends: 88 [2021-08-26 07:37:06,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:37:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-26 07:37:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2021-08-26 07:37:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 68 states have (on average 1.338235294117647) internal successors, (91), 70 states have internal predecessors, (91), 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 07:37:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-08-26 07:37:06,935 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2021-08-26 07:37:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:06,935 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-08-26 07:37:06,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 07:37:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-08-26 07:37:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:37:06,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:06,935 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:06,956 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 07:37:07,136 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 07:37:07,136 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:07,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:07,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1921461423, now seen corresponding path program 1 times [2021-08-26 07:37:07,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:07,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44254459] [2021-08-26 07:37:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:07,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:07,142 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:07,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879554176] [2021-08-26 07:37:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:07,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:07,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:07,143 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 07:37:07,171 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 07:37:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:37:07,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-26 07:37:07,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:07,760 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 07:37:07,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:07,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44254459] [2021-08-26 07:37:07,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:07,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879554176] [2021-08-26 07:37:07,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879554176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:07,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:07,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 07:37:07,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272441385] [2021-08-26 07:37:07,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:37:07,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:07,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:37:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:37:07,762 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 07:37:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:08,149 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-08-26 07:37:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 07:37:08,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 07:37:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:08,150 INFO L225 Difference]: With dead ends: 91 [2021-08-26 07:37:08,150 INFO L226 Difference]: Without dead ends: 89 [2021-08-26 07:37:08,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:37:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-26 07:37:08,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-08-26 07:37:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 68 states have (on average 1.338235294117647) internal successors, (91), 70 states have internal predecessors, (91), 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 07:37:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-08-26 07:37:08,154 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2021-08-26 07:37:08,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:08,154 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-08-26 07:37:08,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 07:37:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-08-26 07:37:08,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:37:08,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:08,155 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:08,173 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 07:37:08,364 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 07:37:08,365 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:08,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1781077366, now seen corresponding path program 2 times [2021-08-26 07:37:08,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:08,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731601610] [2021-08-26 07:37:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:08,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:08,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:08,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937060918] [2021-08-26 07:37:08,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:37:08,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:08,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:08,383 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 07:37:08,384 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 07:37:08,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:37:08,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:08,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 07:37:08,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:08,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:08,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731601610] [2021-08-26 07:37:08,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:08,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937060918] [2021-08-26 07:37:08,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937060918] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:37:08,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:37:08,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 07:37:08,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012011315] [2021-08-26 07:37:08,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 07:37:08,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:08,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 07:37:08,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 07:37:08,758 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 07:37:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:08,783 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2021-08-26 07:37:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 07:37:08,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 07:37:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:08,789 INFO L225 Difference]: With dead ends: 124 [2021-08-26 07:37:08,789 INFO L226 Difference]: Without dead ends: 97 [2021-08-26 07:37:08,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 07:37:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-26 07:37:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2021-08-26 07:37:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.382716049382716) internal successors, (112), 83 states have internal predecessors, (112), 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 07:37:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2021-08-26 07:37:08,794 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 20 [2021-08-26 07:37:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:08,794 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2021-08-26 07:37:08,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 07:37:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2021-08-26 07:37:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:37:08,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:08,795 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:08,813 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 07:37:09,013 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 07:37:09,013 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:09,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2083698570, now seen corresponding path program 1 times [2021-08-26 07:37:09,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:09,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5384737] [2021-08-26 07:37:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:09,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:09,019 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:09,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932613051] [2021-08-26 07:37:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:09,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:09,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:09,020 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 07:37:09,047 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 07:37:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:37:09,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 07:37:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:09,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:09,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5384737] [2021-08-26 07:37:09,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:09,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932613051] [2021-08-26 07:37:09,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932613051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:09,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:09,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 07:37:09,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585372994] [2021-08-26 07:37:09,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:37:09,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:09,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:37:09,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:37:09,463 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 07:37:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:09,613 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2021-08-26 07:37:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 07:37:09,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 07:37:09,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:09,613 INFO L225 Difference]: With dead ends: 114 [2021-08-26 07:37:09,614 INFO L226 Difference]: Without dead ends: 104 [2021-08-26 07:37:09,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-08-26 07:37:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-26 07:37:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2021-08-26 07:37:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.323076923076923) internal successors, (86), 67 states have internal predecessors, (86), 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 07:37:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-08-26 07:37:09,618 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 20 [2021-08-26 07:37:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:09,618 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-08-26 07:37:09,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 07:37:09,619 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-08-26 07:37:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:37:09,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:09,619 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:09,639 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 07:37:09,835 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 07:37:09,835 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:09,835 INFO L82 PathProgramCache]: Analyzing trace with hash -2043615771, now seen corresponding path program 2 times [2021-08-26 07:37:09,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:09,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122031170] [2021-08-26 07:37:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:09,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:09,842 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:09,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565347968] [2021-08-26 07:37:09,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:37:09,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:09,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:09,844 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 07:37:09,879 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 07:37:10,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:37:10,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:10,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 07:37:10,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:15,762 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 07:37:15,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:15,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122031170] [2021-08-26 07:37:15,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:15,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565347968] [2021-08-26 07:37:15,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565347968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:15,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:15,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 07:37:15,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076518646] [2021-08-26 07:37:15,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 07:37:15,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 07:37:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:37:15,763 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 07:37:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:17,104 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2021-08-26 07:37:17,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 07:37:17,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 07:37:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:17,104 INFO L225 Difference]: With dead ends: 93 [2021-08-26 07:37:17,104 INFO L226 Difference]: Without dead ends: 91 [2021-08-26 07:37:17,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 805.3ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-26 07:37:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-26 07:37:17,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2021-08-26 07:37:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 72 states have internal predecessors, (92), 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 07:37:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-08-26 07:37:17,109 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 20 [2021-08-26 07:37:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:17,109 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-08-26 07:37:17,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 07:37:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-08-26 07:37:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:37:17,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:17,110 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:17,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-26 07:37:17,320 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 07:37:17,321 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:17,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1650588761, now seen corresponding path program 2 times [2021-08-26 07:37:17,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:17,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659526817] [2021-08-26 07:37:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:17,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:17,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:17,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470014472] [2021-08-26 07:37:17,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:37:17,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:17,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:17,329 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 07:37:17,331 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 07:37:17,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:37:17,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:17,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 07:37:17,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:19,057 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 07:37:19,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:19,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659526817] [2021-08-26 07:37:19,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:19,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470014472] [2021-08-26 07:37:19,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470014472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:19,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:19,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 07:37:19,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638814670] [2021-08-26 07:37:19,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 07:37:19,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:19,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 07:37:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:37:19,058 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 07:37:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:19,500 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2021-08-26 07:37:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:37:19,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 07:37:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:19,500 INFO L225 Difference]: With dead ends: 115 [2021-08-26 07:37:19,500 INFO L226 Difference]: Without dead ends: 89 [2021-08-26 07:37:19,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-26 07:37:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-26 07:37:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-08-26 07:37:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 73 states have internal predecessors, (93), 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 07:37:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2021-08-26 07:37:19,506 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 20 [2021-08-26 07:37:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:19,506 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2021-08-26 07:37:19,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 07:37:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2021-08-26 07:37:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:37:19,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:19,506 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:19,526 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 07:37:19,716 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 07:37:19,717 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash 710606163, now seen corresponding path program 1 times [2021-08-26 07:37:19,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:19,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908129347] [2021-08-26 07:37:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:19,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:19,722 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:19,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653096742] [2021-08-26 07:37:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:19,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:19,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:19,724 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:19,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 07:37:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:37:20,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 07:37:20,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:20,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:20,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908129347] [2021-08-26 07:37:20,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:20,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653096742] [2021-08-26 07:37:20,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653096742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:20,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:20,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:37:20,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905249993] [2021-08-26 07:37:20,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:37:20,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:37:20,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:37:20,230 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 07:37:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:20,264 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2021-08-26 07:37:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:37:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 21 [2021-08-26 07:37:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:20,265 INFO L225 Difference]: With dead ends: 130 [2021-08-26 07:37:20,265 INFO L226 Difference]: Without dead ends: 99 [2021-08-26 07:37:20,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:37:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-26 07:37:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 68. [2021-08-26 07:37:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 67 states have internal predecessors, (83), 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 07:37:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-08-26 07:37:20,270 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 21 [2021-08-26 07:37:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:20,270 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-08-26 07:37:20,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 07:37:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-08-26 07:37:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:37:20,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:20,271 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:20,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 07:37:20,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:20,489 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1155385553, now seen corresponding path program 2 times [2021-08-26 07:37:20,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:20,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55713661] [2021-08-26 07:37:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:20,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:20,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:20,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066666389] [2021-08-26 07:37:20,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:37:20,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:20,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:20,504 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:20,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 07:37:20,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:37:20,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:20,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 07:37:20,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:21,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:21,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55713661] [2021-08-26 07:37:21,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:21,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066666389] [2021-08-26 07:37:21,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066666389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:21,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:21,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 07:37:21,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794437282] [2021-08-26 07:37:21,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 07:37:21,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:21,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 07:37:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:37:21,103 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 07:37:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:21,318 INFO L93 Difference]: Finished difference Result 161 states and 187 transitions. [2021-08-26 07:37:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 07:37:21,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 21 [2021-08-26 07:37:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:21,319 INFO L225 Difference]: With dead ends: 161 [2021-08-26 07:37:21,319 INFO L226 Difference]: Without dead ends: 137 [2021-08-26 07:37:21,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-26 07:37:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-26 07:37:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 86. [2021-08-26 07:37:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 85 states have internal predecessors, (109), 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 07:37:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2021-08-26 07:37:21,327 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 21 [2021-08-26 07:37:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:21,327 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2021-08-26 07:37:21,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 07:37:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2021-08-26 07:37:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 07:37:21,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:21,328 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:21,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-26 07:37:21,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:21,528 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1546643436, now seen corresponding path program 2 times [2021-08-26 07:37:21,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:21,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962482833] [2021-08-26 07:37:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:21,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:21,534 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:21,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193559144] [2021-08-26 07:37:21,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:37:21,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:21,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:21,553 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:21,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 07:37:22,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:37:22,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:22,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 07:37:22,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:22,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:22,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962482833] [2021-08-26 07:37:22,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:22,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193559144] [2021-08-26 07:37:22,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193559144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:22,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:22,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 07:37:22,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073696107] [2021-08-26 07:37:22,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:37:22,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:22,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:37:22,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:37:22,217 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:37:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:22,383 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2021-08-26 07:37:22,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:37:22,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:37:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:22,384 INFO L225 Difference]: With dead ends: 141 [2021-08-26 07:37:22,384 INFO L226 Difference]: Without dead ends: 111 [2021-08-26 07:37:22,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-26 07:37:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-26 07:37:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2021-08-26 07:37:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 69 states have internal predecessors, (85), 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 07:37:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2021-08-26 07:37:22,389 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 22 [2021-08-26 07:37:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:22,390 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2021-08-26 07:37:22,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:37:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2021-08-26 07:37:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 07:37:22,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:22,390 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:22,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-26 07:37:22,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-26 07:37:22,601 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:22,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1544796394, now seen corresponding path program 1 times [2021-08-26 07:37:22,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:22,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330605925] [2021-08-26 07:37:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:22,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:22,609 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:22,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433513856] [2021-08-26 07:37:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:22,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:22,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:22,625 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:22,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 07:37:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:37:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 07:37:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:23,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:23,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330605925] [2021-08-26 07:37:23,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:23,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433513856] [2021-08-26 07:37:23,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433513856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:23,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:23,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 07:37:23,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196972082] [2021-08-26 07:37:23,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:37:23,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:37:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:37:23,356 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:37:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:23,769 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2021-08-26 07:37:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:37:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:37:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:23,770 INFO L225 Difference]: With dead ends: 118 [2021-08-26 07:37:23,770 INFO L226 Difference]: Without dead ends: 116 [2021-08-26 07:37:23,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:37:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-26 07:37:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2021-08-26 07:37:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 85 states have internal predecessors, (104), 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 07:37:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2021-08-26 07:37:23,783 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 22 [2021-08-26 07:37:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:23,783 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2021-08-26 07:37:23,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 07:37:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2021-08-26 07:37:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 07:37:23,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:23,784 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:23,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-26 07:37:23,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-26 07:37:23,993 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1286630956, now seen corresponding path program 2 times [2021-08-26 07:37:23,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:23,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766852413] [2021-08-26 07:37:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:23,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:23,998 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:23,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456385979] [2021-08-26 07:37:23,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:37:23,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:23,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:24,001 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:24,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 07:37:24,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:37:24,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:24,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 07:37:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:24,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:24,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766852413] [2021-08-26 07:37:24,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:24,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456385979] [2021-08-26 07:37:24,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456385979] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:37:24,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:37:24,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 07:37:24,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282503984] [2021-08-26 07:37:24,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 07:37:24,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:24,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 07:37:24,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 07:37:24,534 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 07:37:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:24,564 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2021-08-26 07:37:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 07:37:24,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 07:37:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:24,565 INFO L225 Difference]: With dead ends: 140 [2021-08-26 07:37:24,565 INFO L226 Difference]: Without dead ends: 96 [2021-08-26 07:37:24,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 07:37:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-26 07:37:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-08-26 07:37:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 67 states have internal predecessors, (83), 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 07:37:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-08-26 07:37:24,587 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 22 [2021-08-26 07:37:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:24,587 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-08-26 07:37:24,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 07:37:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-08-26 07:37:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 07:37:24,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:24,588 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:24,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-26 07:37:24,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 07:37:24,804 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:24,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1685529819, now seen corresponding path program 3 times [2021-08-26 07:37:24,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:24,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867961523] [2021-08-26 07:37:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:24,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:24,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:24,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391319584] [2021-08-26 07:37:24,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 07:37:24,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:24,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:24,837 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:24,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 07:37:25,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 07:37:25,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:25,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 07:37:25,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-26 07:37:25,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:25,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867961523] [2021-08-26 07:37:25,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:25,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391319584] [2021-08-26 07:37:25,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391319584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:25,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:25,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 07:37:25,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345025807] [2021-08-26 07:37:25,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:37:25,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:25,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:37:25,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:37:25,469 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 07:37:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:25,837 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2021-08-26 07:37:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:37:25,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 23 [2021-08-26 07:37:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:25,838 INFO L225 Difference]: With dead ends: 73 [2021-08-26 07:37:25,838 INFO L226 Difference]: Without dead ends: 71 [2021-08-26 07:37:25,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:37:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-26 07:37:25,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2021-08-26 07:37:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 62 states have internal predecessors, (76), 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 07:37:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-08-26 07:37:25,853 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 23 [2021-08-26 07:37:25,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:25,853 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-08-26 07:37:25,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 07:37:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-08-26 07:37:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 07:37:25,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:25,861 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:25,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-26 07:37:26,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 07:37:26,078 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:26,078 INFO L82 PathProgramCache]: Analyzing trace with hash 711789089, now seen corresponding path program 3 times [2021-08-26 07:37:26,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:26,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982000899] [2021-08-26 07:37:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:26,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:26,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:26,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087948182] [2021-08-26 07:37:26,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 07:37:26,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:26,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:26,094 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:26,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 07:37:26,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 07:37:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:26,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 07:37:26,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:26,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:26,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982000899] [2021-08-26 07:37:26,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:26,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087948182] [2021-08-26 07:37:26,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087948182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:26,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:26,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 07:37:26,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279299239] [2021-08-26 07:37:26,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:37:26,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:26,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:37:26,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:37:26,678 INFO L87 Difference]: Start difference. First operand 63 states and 76 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 07:37:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:26,716 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-08-26 07:37:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 07:37:26,716 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 07:37:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:26,717 INFO L225 Difference]: With dead ends: 90 [2021-08-26 07:37:26,717 INFO L226 Difference]: Without dead ends: 82 [2021-08-26 07:37:26,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:37:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-26 07:37:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-08-26 07:37:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.2375) internal successors, (99), 81 states have internal predecessors, (99), 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 07:37:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-08-26 07:37:26,726 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 24 [2021-08-26 07:37:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:26,726 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-08-26 07:37:26,726 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 07:37:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-08-26 07:37:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 07:37:26,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:26,727 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:26,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-26 07:37:26,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-26 07:37:26,946 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:26,946 INFO L82 PathProgramCache]: Analyzing trace with hash -388617808, now seen corresponding path program 4 times [2021-08-26 07:37:26,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:26,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828718744] [2021-08-26 07:37:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:26,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:26,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:26,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499348776] [2021-08-26 07:37:26,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 07:37:26,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:26,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:26,957 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:26,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-26 07:37:27,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 07:37:27,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:27,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 07:37:27,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:27,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:27,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828718744] [2021-08-26 07:37:27,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:27,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499348776] [2021-08-26 07:37:27,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499348776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:27,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:27,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 07:37:27,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226586313] [2021-08-26 07:37:27,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 07:37:27,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:27,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 07:37:27,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:37:27,548 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 07:37:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:27,587 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2021-08-26 07:37:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 07:37:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 29 [2021-08-26 07:37:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:27,588 INFO L225 Difference]: With dead ends: 109 [2021-08-26 07:37:27,588 INFO L226 Difference]: Without dead ends: 101 [2021-08-26 07:37:27,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-26 07:37:27,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-26 07:37:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-08-26 07:37:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 100 states have internal predecessors, (122), 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 07:37:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2021-08-26 07:37:27,598 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 29 [2021-08-26 07:37:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:27,598 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2021-08-26 07:37:27,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 07:37:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2021-08-26 07:37:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 07:37:27,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:27,598 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:27,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-26 07:37:27,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:27,817 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:27,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1639093375, now seen corresponding path program 5 times [2021-08-26 07:37:27,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:27,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67993252] [2021-08-26 07:37:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:27,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:27,824 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:27,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268902601] [2021-08-26 07:37:27,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 07:37:27,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:27,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:27,826 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:27,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-26 07:37:28,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 07:37:28,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:28,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 07:37:28,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:28,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:28,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67993252] [2021-08-26 07:37:28,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:28,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268902601] [2021-08-26 07:37:28,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268902601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:28,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:28,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 07:37:28,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659213891] [2021-08-26 07:37:28,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 07:37:28,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 07:37:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:37:28,445 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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 07:37:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:28,496 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2021-08-26 07:37:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 07:37:28,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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 34 [2021-08-26 07:37:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:28,497 INFO L225 Difference]: With dead ends: 128 [2021-08-26 07:37:28,497 INFO L226 Difference]: Without dead ends: 120 [2021-08-26 07:37:28,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-26 07:37:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-26 07:37:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-08-26 07:37:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 118 states have (on average 1.228813559322034) internal successors, (145), 119 states have internal predecessors, (145), 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 07:37:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 145 transitions. [2021-08-26 07:37:28,509 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 145 transitions. Word has length 34 [2021-08-26 07:37:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:28,509 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 145 transitions. [2021-08-26 07:37:28,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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 07:37:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 145 transitions. [2021-08-26 07:37:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-26 07:37:28,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:28,509 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:28,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-26 07:37:28,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-26 07:37:28,721 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash 182166608, now seen corresponding path program 6 times [2021-08-26 07:37:28,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:28,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219739647] [2021-08-26 07:37:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:28,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:28,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:28,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648573227] [2021-08-26 07:37:28,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 07:37:28,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:28,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:28,733 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:28,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-26 07:37:29,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-26 07:37:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:29,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 07:37:29,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:29,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:29,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219739647] [2021-08-26 07:37:29,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:29,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648573227] [2021-08-26 07:37:29,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648573227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:29,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:29,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 07:37:29,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074177103] [2021-08-26 07:37:29,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 07:37:29,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:29,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 07:37:29,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:37:29,449 INFO L87 Difference]: Start difference. First operand 120 states and 145 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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 07:37:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:29,511 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2021-08-26 07:37:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 07:37:29,511 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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 39 [2021-08-26 07:37:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:29,512 INFO L225 Difference]: With dead ends: 147 [2021-08-26 07:37:29,512 INFO L226 Difference]: Without dead ends: 139 [2021-08-26 07:37:29,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-08-26 07:37:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-26 07:37:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-08-26 07:37:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.2262773722627738) internal successors, (168), 138 states have internal predecessors, (168), 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 07:37:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 168 transitions. [2021-08-26 07:37:29,526 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 168 transitions. Word has length 39 [2021-08-26 07:37:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:29,526 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 168 transitions. [2021-08-26 07:37:29,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 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 07:37:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 168 transitions. [2021-08-26 07:37:29,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 07:37:29,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:29,526 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:29,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-26 07:37:29,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:29,745 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash 933991649, now seen corresponding path program 7 times [2021-08-26 07:37:29,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:29,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653261342] [2021-08-26 07:37:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:29,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:29,751 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:29,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282524561] [2021-08-26 07:37:29,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 07:37:29,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:29,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:29,753 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:29,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-26 07:37:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:37:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 07:37:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:30,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:30,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653261342] [2021-08-26 07:37:30,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:30,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282524561] [2021-08-26 07:37:30,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282524561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:30,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:30,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 07:37:30,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453096679] [2021-08-26 07:37:30,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 07:37:30,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 07:37:30,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:37:30,426 INFO L87 Difference]: Start difference. First operand 139 states and 168 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 07:37:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:30,499 INFO L93 Difference]: Finished difference Result 166 states and 201 transitions. [2021-08-26 07:37:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 07:37:30,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) Word has length 44 [2021-08-26 07:37:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:30,501 INFO L225 Difference]: With dead ends: 166 [2021-08-26 07:37:30,501 INFO L226 Difference]: Without dead ends: 158 [2021-08-26 07:37:30,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-08-26 07:37:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-26 07:37:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-08-26 07:37:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 156 states have (on average 1.2243589743589745) internal successors, (191), 157 states have internal predecessors, (191), 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 07:37:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 191 transitions. [2021-08-26 07:37:30,529 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 191 transitions. Word has length 44 [2021-08-26 07:37:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:30,529 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 191 transitions. [2021-08-26 07:37:30,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 07:37:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 191 transitions. [2021-08-26 07:37:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-26 07:37:30,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:30,530 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:30,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-26 07:37:30,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:30,761 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:30,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:30,762 INFO L82 PathProgramCache]: Analyzing trace with hash 918574832, now seen corresponding path program 8 times [2021-08-26 07:37:30,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:30,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716480065] [2021-08-26 07:37:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:30,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:30,770 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:30,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223688342] [2021-08-26 07:37:30,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:37:30,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:30,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:30,771 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:30,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-26 07:37:31,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:37:31,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:37:31,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 07:37:31,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:37:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:37:31,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:37:31,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716480065] [2021-08-26 07:37:31,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:37:31,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223688342] [2021-08-26 07:37:31,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223688342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:37:31,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:37:31,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 07:37:31,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488977606] [2021-08-26 07:37:31,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 07:37:31,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:37:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 07:37:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-26 07:37:31,520 INFO L87 Difference]: Start difference. First operand 158 states and 191 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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 07:37:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:37:31,606 INFO L93 Difference]: Finished difference Result 185 states and 224 transitions. [2021-08-26 07:37:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 07:37:31,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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 49 [2021-08-26 07:37:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:37:31,607 INFO L225 Difference]: With dead ends: 185 [2021-08-26 07:37:31,608 INFO L226 Difference]: Without dead ends: 177 [2021-08-26 07:37:31,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-08-26 07:37:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-26 07:37:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-08-26 07:37:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.2228571428571429) internal successors, (214), 176 states have internal predecessors, (214), 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 07:37:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 214 transitions. [2021-08-26 07:37:31,661 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 214 transitions. Word has length 49 [2021-08-26 07:37:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:37:31,661 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 214 transitions. [2021-08-26 07:37:31,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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 07:37:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 214 transitions. [2021-08-26 07:37:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-26 07:37:31,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:37:31,662 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:37:31,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-26 07:37:31,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-26 07:37:31,863 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:37:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:37:31,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1444051391, now seen corresponding path program 9 times [2021-08-26 07:37:31,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:37:31,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172929561] [2021-08-26 07:37:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:37:31,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:37:31,869 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:37:31,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786198816] [2021-08-26 07:37:31,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 07:37:31,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:37:31,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:37:31,873 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:37:31,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-26 07:42:05,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-26 07:42:05,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:42:05,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 07:42:05,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:42:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:42:05,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:42:05,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172929561] [2021-08-26 07:42:05,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:42:05,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786198816] [2021-08-26 07:42:05,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786198816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:42:05,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:42:05,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 07:42:05,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785097092] [2021-08-26 07:42:05,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 07:42:05,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:42:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 07:42:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-26 07:42:05,936 INFO L87 Difference]: Start difference. First operand 177 states and 214 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 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 07:42:06,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:42:06,045 INFO L93 Difference]: Finished difference Result 204 states and 247 transitions. [2021-08-26 07:42:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 07:42:06,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 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 54 [2021-08-26 07:42:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:42:06,046 INFO L225 Difference]: With dead ends: 204 [2021-08-26 07:42:06,046 INFO L226 Difference]: Without dead ends: 196 [2021-08-26 07:42:06,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-08-26 07:42:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-26 07:42:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-08-26 07:42:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 1.2216494845360826) internal successors, (237), 195 states have internal predecessors, (237), 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 07:42:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 237 transitions. [2021-08-26 07:42:06,067 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 237 transitions. Word has length 54 [2021-08-26 07:42:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:42:06,067 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 237 transitions. [2021-08-26 07:42:06,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 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 07:42:06,068 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 237 transitions. [2021-08-26 07:42:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-26 07:42:06,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:42:06,068 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:42:06,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-26 07:42:06,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-26 07:42:06,286 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:42:06,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:42:06,286 INFO L82 PathProgramCache]: Analyzing trace with hash -388087408, now seen corresponding path program 10 times [2021-08-26 07:42:06,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:42:06,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953507223] [2021-08-26 07:42:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:42:06,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:42:06,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:42:06,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4404249] [2021-08-26 07:42:06,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 07:42:06,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:42:06,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:42:06,295 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:42:06,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-26 07:42:06,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 07:42:06,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-26 07:42:06,915 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 07:42:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 07:42:06,975 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 07:42:06,975 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 07:42:06,976 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:42:06,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:42:06,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:42:07,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-26 07:42:07,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-26 07:42:07,191 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 07:42:07,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:42:07 BoogieIcfgContainer [2021-08-26 07:42:07,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 07:42:07,238 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 07:42:07,238 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 07:42:07,238 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 07:42:07,239 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:35:40" (3/4) ... [2021-08-26 07:42:07,240 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 07:42:07,295 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 07:42:07,296 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 07:42:07,296 INFO L168 Benchmark]: Toolchain (without parser) took 387122.21 ms. Allocated memory was 69.2 MB in the beginning and 352.3 MB in the end (delta: 283.1 MB). Free memory was 50.4 MB in the beginning and 262.7 MB in the end (delta: -212.3 MB). Peak memory consumption was 70.3 MB. Max. memory is 16.1 GB. [2021-08-26 07:42:07,297 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 69.2 MB. Free memory was 51.8 MB in the beginning and 51.7 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:42:07,297 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.40 ms. Allocated memory is still 69.2 MB. Free memory was 50.2 MB in the beginning and 53.5 MB in the end (delta: -3.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2021-08-26 07:42:07,297 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.14 ms. Allocated memory is still 69.2 MB. Free memory was 53.5 MB in the beginning and 51.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:42:07,297 INFO L168 Benchmark]: Boogie Preprocessor took 12.92 ms. Allocated memory is still 69.2 MB. Free memory was 51.8 MB in the beginning and 50.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:42:07,297 INFO L168 Benchmark]: RCFGBuilder took 410.86 ms. Allocated memory is still 69.2 MB. Free memory was 50.7 MB in the beginning and 35.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 07:42:07,298 INFO L168 Benchmark]: TraceAbstraction took 386460.70 ms. Allocated memory was 69.2 MB in the beginning and 352.3 MB in the end (delta: 283.1 MB). Free memory was 35.0 MB in the beginning and 267.9 MB in the end (delta: -232.9 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. [2021-08-26 07:42:07,298 INFO L168 Benchmark]: Witness Printer took 57.70 ms. Allocated memory is still 352.3 MB. Free memory was 267.9 MB in the beginning and 262.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-26 07:42:07,299 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 69.2 MB. Free memory was 51.8 MB in the beginning and 51.7 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 155.40 ms. Allocated memory is still 69.2 MB. Free memory was 50.2 MB in the beginning and 53.5 MB in the end (delta: -3.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 20.14 ms. Allocated memory is still 69.2 MB. Free memory was 53.5 MB in the beginning and 51.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.92 ms. Allocated memory is still 69.2 MB. Free memory was 51.8 MB in the beginning and 50.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 410.86 ms. Allocated memory is still 69.2 MB. Free memory was 50.7 MB in the beginning and 35.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 386460.70 ms. Allocated memory was 69.2 MB in the beginning and 352.3 MB in the end (delta: 283.1 MB). Free memory was 35.0 MB in the beginning and 267.9 MB in the end (delta: -232.9 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. * Witness Printer took 57.70 ms. Allocated memory is still 352.3 MB. Free memory was 267.9 MB in the beginning and 262.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=1] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=2] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=2] [L33] EXPR counter++ VAL [counter=3] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=3] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=3] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=3] [L33] EXPR counter++ VAL [counter=4] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=4] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=4] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=4] [L33] EXPR counter++ VAL [counter=5] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=5] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=5] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=5] [L33] EXPR counter++ VAL [counter=6] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=6] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=6] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=6] [L33] EXPR counter++ VAL [counter=7] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=7] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=7] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=7] [L33] EXPR counter++ VAL [counter=8] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=8] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=8] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=8] [L33] EXPR counter++ VAL [counter=9] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=9] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=9] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=9] [L33] EXPR counter++ VAL [counter=10] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=10] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=10] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=10] [L33] EXPR counter++ VAL [counter=11] [L33] COND FALSE !(counter++<10) [L12] COND TRUE !(cond) VAL [counter=11] [L14] reach_error() VAL [counter=11] - UnprovableResult [Line: 14]: 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: 14]: 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, 25 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 386351.4ms, OverallIterations: 36, TraceHistogramMax: 11, EmptinessCheckTime: 21.2ms, AutomataDifference: 34683.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 744 SDtfs, 2004 SDslu, 1927 SDs, 0 SdLazy, 2207 SolverSat, 398 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 17479.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 857 GetRequests, 520 SyntacticMatches, 1 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 25309.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred in iteration=35, InterpolantAutomatonStates: 323, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 309.3ms AutomataMinimizationTime, 35 MinimizatonAttempts, 501 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 220.3ms SsaConstructionTime, 274043.2ms SatisfiabilityAnalysisTime, 58584.5ms InterpolantComputationTime, 812 NumberOfCodeBlocks, 802 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 718 ConstructedInterpolants, 2 QuantifiedInterpolants, 5886 SizeOfPredicates, 233 NumberOfNonLiveVariables, 4005 ConjunctsInSsa, 670 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 83/890 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 07:42:07,326 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...