./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/egcd2-ll_unwindbound2.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 149c8585f8a0507ccdc7ff098e5c95b93f9a1ba8 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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-wip.dd.seqcomp-5fbdf5b [2021-08-29 12:45:24,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 12:45:24,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 12:45:24,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 12:45:24,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 12:45:24,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 12:45:24,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 12:45:24,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 12:45:24,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 12:45:24,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 12:45:24,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 12:45:24,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 12:45:24,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 12:45:24,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 12:45:24,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 12:45:24,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 12:45:24,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 12:45:24,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 12:45:24,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 12:45:24,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 12:45:24,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 12:45:24,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 12:45:24,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 12:45:24,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 12:45:24,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 12:45:24,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 12:45:24,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 12:45:24,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 12:45:24,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 12:45:24,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 12:45:25,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 12:45:25,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 12:45:25,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 12:45:25,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 12:45:25,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 12:45:25,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 12:45:25,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 12:45:25,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 12:45:25,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 12:45:25,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 12:45:25,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 12:45:25,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 12:45:25,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 12:45:25,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 12:45:25,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 12:45:25,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 12:45:25,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 12:45:25,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 12:45:25,027 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 12:45:25,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 12:45:25,027 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 12:45:25,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 12:45:25,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 12:45:25,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 12:45:25,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 12:45:25,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 12:45:25,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 12:45:25,029 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 12:45:25,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 12:45:25,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 12:45:25,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 12:45:25,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 12:45:25,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 12:45:25,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 12:45:25,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:45:25,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 12:45:25,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 12:45:25,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 12:45:25,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 12:45:25,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 12:45:25,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 12:45:25,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 12:45:25,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 149c8585f8a0507ccdc7ff098e5c95b93f9a1ba8 [2021-08-29 12:45:25,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 12:45:25,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 12:45:25,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 12:45:25,303 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 12:45:25,304 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 12:45:25,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound2.c [2021-08-29 12:45:25,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe434b34/72d8e8c973e14262bff56132566e0bd4/FLAG67fdc952a [2021-08-29 12:45:25,656 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 12:45:25,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound2.c [2021-08-29 12:45:25,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe434b34/72d8e8c973e14262bff56132566e0bd4/FLAG67fdc952a [2021-08-29 12:45:26,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe434b34/72d8e8c973e14262bff56132566e0bd4 [2021-08-29 12:45:26,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 12:45:26,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 12:45:26,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 12:45:26,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 12:45:26,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 12:45:26,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@470e3209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26, skipping insertion in model container [2021-08-29 12:45:26,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 12:45:26,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 12:45:26,236 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/egcd2-ll_unwindbound2.c[490,503] [2021-08-29 12:45:26,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:45:26,267 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 12:45:26,278 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/egcd2-ll_unwindbound2.c[490,503] [2021-08-29 12:45:26,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:45:26,347 INFO L208 MainTranslator]: Completed translation [2021-08-29 12:45:26,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26 WrapperNode [2021-08-29 12:45:26,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 12:45:26,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 12:45:26,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 12:45:26,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 12:45:26,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 12:45:26,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 12:45:26,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 12:45:26,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 12:45:26,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 12:45:26,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 12:45:26,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 12:45:26,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 12:45:26,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (1/1) ... [2021-08-29 12:45:26,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:45:26,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:45:26,452 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) [2021-08-29 12:45:26,471 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 [2021-08-29 12:45:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 12:45:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 12:45:26,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 12:45:26,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 12:45:26,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 12:45:26,653 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-08-29 12:45:26,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:45:26 BoogieIcfgContainer [2021-08-29 12:45:26,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 12:45:26,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 12:45:26,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 12:45:26,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 12:45:26,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 12:45:26" (1/3) ... [2021-08-29 12:45:26,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e92841c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:45:26, skipping insertion in model container [2021-08-29 12:45:26,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:45:26" (2/3) ... [2021-08-29 12:45:26,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e92841c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:45:26, skipping insertion in model container [2021-08-29 12:45:26,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:45:26" (3/3) ... [2021-08-29 12:45:26,664 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound2.c [2021-08-29 12:45:26,687 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 12:45:26,687 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-08-29 12:45:26,736 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 12:45:26,743 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 [2021-08-29 12:45:26,744 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-29 12:45:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 36 states have (on average 1.6111111111111112) 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) [2021-08-29 12:45:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 12:45:26,759 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:45:26,760 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:45:26,761 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 12:45:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:45:26,764 INFO L82 PathProgramCache]: Analyzing trace with hash -141782897, now seen corresponding path program 1 times [2021-08-29 12:45:26,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:45:26,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843390438] [2021-08-29 12:45:26,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:26,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:45:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:45:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:45:26,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:45:26,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843390438] [2021-08-29 12:45:26,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843390438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:45:26,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:45:26,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 12:45:26,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683560701] [2021-08-29 12:45:26,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 12:45:26,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:45:26,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 12:45:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 12:45:26,961 INFO L87 Difference]: Start difference. First operand has 43 states, 36 states have (on average 1.6111111111111112) 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2021-08-29 12:45:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:45:27,075 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2021-08-29 12:45:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 12:45:27,077 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 [2021-08-29 12:45:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:45:27,082 INFO L225 Difference]: With dead ends: 83 [2021-08-29 12:45:27,082 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 12:45:27,084 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.04ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 12:45:27,086 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.34ms IncrementalHoareTripleChecker+Time [2021-08-29 12:45:27,087 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.35ms Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 89.34ms Time] [2021-08-29 12:45:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 12:45:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-29 12:45:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 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) [2021-08-29 12:45:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-29 12:45:27,108 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2021-08-29 12:45:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:45:27,108 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-29 12:45:27,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2021-08-29 12:45:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-29 12:45:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 12:45:27,109 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:45:27,109 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:45:27,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 12:45:27,110 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 12:45:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:45:27,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1057770534, now seen corresponding path program 1 times [2021-08-29 12:45:27,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:45:27,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493193928] [2021-08-29 12:45:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:27,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:45:27,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:45:27,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949525906] [2021-08-29 12:45:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:27,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:45:27,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:45:27,154 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) [2021-08-29 12:45:27,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 12:45:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:45:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 12:45:27,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:45:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:45:27,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:45:27,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:45:27,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493193928] [2021-08-29 12:45:27,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:45:27,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949525906] [2021-08-29 12:45:27,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949525906] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:45:27,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:45:27,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 12:45:27,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498501864] [2021-08-29 12:45:27,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:45:27,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:45:27,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:45:27,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:45:27,391 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2021-08-29 12:45:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:45:27,477 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-08-29 12:45:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:45:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 [2021-08-29 12:45:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:45:27,479 INFO L225 Difference]: With dead ends: 49 [2021-08-29 12:45:27,480 INFO L226 Difference]: Without dead ends: 41 [2021-08-29 12:45:27,481 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.05ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:45:27,482 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.56ms IncrementalHoareTripleChecker+Time [2021-08-29 12:45:27,483 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 71.56ms Time] [2021-08-29 12:45:27,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-29 12:45:27,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-08-29 12:45:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 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) [2021-08-29 12:45:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-08-29 12:45:27,492 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2021-08-29 12:45:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:45:27,493 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-08-29 12:45:27,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2021-08-29 12:45:27,493 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-08-29 12:45:27,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 12:45:27,496 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:45:27,497 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:45:27,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 12:45:27,719 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 [2021-08-29 12:45:27,720 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 12:45:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:45:27,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1568670238, now seen corresponding path program 1 times [2021-08-29 12:45:27,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:45:27,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645316164] [2021-08-29 12:45:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:27,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:45:27,739 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:45:27,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134271808] [2021-08-29 12:45:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:27,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:45:27,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:45:27,753 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) [2021-08-29 12:45:27,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 12:45:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:45:27,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 12:45:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:45:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:45:27,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:45:27,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:45:27,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645316164] [2021-08-29 12:45:27,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:45:27,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134271808] [2021-08-29 12:45:27,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134271808] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:45:27,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:45:27,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 12:45:27,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720665176] [2021-08-29 12:45:27,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 12:45:27,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:45:27,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 12:45:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:45:27,976 INFO L87 Difference]: Start difference. First operand 41 states and 44 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) [2021-08-29 12:45:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:45:28,129 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-08-29 12:45:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 12:45:28,130 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 [2021-08-29 12:45:28,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:45:28,131 INFO L225 Difference]: With dead ends: 69 [2021-08-29 12:45:28,131 INFO L226 Difference]: Without dead ends: 61 [2021-08-29 12:45:28,131 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.48ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:45:28,131 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.03ms IncrementalHoareTripleChecker+Time [2021-08-29 12:45:28,132 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 126.03ms Time] [2021-08-29 12:45:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-29 12:45:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-08-29 12:45:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.25) internal successors, (45), 41 states have internal predecessors, (45), 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) [2021-08-29 12:45:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-08-29 12:45:28,148 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2021-08-29 12:45:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:45:28,148 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-08-29 12:45:28,148 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) [2021-08-29 12:45:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-08-29 12:45:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 12:45:28,149 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:45:28,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:45:28,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 12:45:28,349 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 [2021-08-29 12:45:28,350 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 12:45:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:45:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1384108475, now seen corresponding path program 1 times [2021-08-29 12:45:28,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:45:28,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954482957] [2021-08-29 12:45:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:28,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:45:28,357 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:45:28,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77895127] [2021-08-29 12:45:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:28,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:45:28,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:45:28,364 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) [2021-08-29 12:45:28,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 12:45:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:45:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 12:45:28,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:45:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:45:28,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:45:28,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:45:28,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954482957] [2021-08-29 12:45:28,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:45:28,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77895127] [2021-08-29 12:45:28,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77895127] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:45:28,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:45:28,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-29 12:45:28,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72508065] [2021-08-29 12:45:28,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 12:45:28,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:45:28,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 12:45:28,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:45:28,512 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-08-29 12:45:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:45:28,674 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-08-29 12:45:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 12:45:28,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 [2021-08-29 12:45:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:45:28,675 INFO L225 Difference]: With dead ends: 80 [2021-08-29 12:45:28,675 INFO L226 Difference]: Without dead ends: 78 [2021-08-29 12:45:28,675 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.99ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-29 12:45:28,676 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.75ms IncrementalHoareTripleChecker+Time [2021-08-29 12:45:28,676 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 241 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 123.75ms Time] [2021-08-29 12:45:28,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-29 12:45:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2021-08-29 12:45:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 44 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) [2021-08-29 12:45:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-08-29 12:45:28,691 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2021-08-29 12:45:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:45:28,691 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-08-29 12:45:28,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-08-29 12:45:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-08-29 12:45:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 12:45:28,692 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:45:28,692 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:45:28,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 12:45:28,908 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 [2021-08-29 12:45:28,909 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 12:45:28,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:45:28,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1311460386, now seen corresponding path program 1 times [2021-08-29 12:45:28,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:45:28,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114161734] [2021-08-29 12:45:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:28,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:45:28,916 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:45:28,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194673303] [2021-08-29 12:45:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:28,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:45:28,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:45:28,920 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) [2021-08-29 12:45:28,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 12:45:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:45:28,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 12:45:28,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:45:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:45:29,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:45:29,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:45:29,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114161734] [2021-08-29 12:45:29,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:45:29,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194673303] [2021-08-29 12:45:29,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194673303] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:45:29,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:45:29,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 12:45:29,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693444904] [2021-08-29 12:45:29,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:45:29,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:45:29,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:45:29,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:45:29,053 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-29 12:45:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:45:29,129 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-08-29 12:45:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:45:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2021-08-29 12:45:29,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:45:29,130 INFO L225 Difference]: With dead ends: 64 [2021-08-29 12:45:29,130 INFO L226 Difference]: Without dead ends: 62 [2021-08-29 12:45:29,130 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.11ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:45:29,131 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.44ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.31ms IncrementalHoareTripleChecker+Time [2021-08-29 12:45:29,131 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.44ms Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 65.31ms Time] [2021-08-29 12:45:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-29 12:45:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-08-29 12:45:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 54 states have internal predecessors, (64), 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) [2021-08-29 12:45:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-08-29 12:45:29,151 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 18 [2021-08-29 12:45:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:45:29,151 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-08-29 12:45:29,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-08-29 12:45:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-08-29 12:45:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 12:45:29,152 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:45:29,152 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:45:29,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 12:45:29,372 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 [2021-08-29 12:45:29,373 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 12:45:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:45:29,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1862118746, now seen corresponding path program 1 times [2021-08-29 12:45:29,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:45:29,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009787490] [2021-08-29 12:45:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:29,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:45:29,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:45:29,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016246920] [2021-08-29 12:45:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:29,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:45:29,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:45:29,384 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) [2021-08-29 12:45:29,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 12:45:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:45:29,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 12:45:29,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:45:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:45:29,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:45:29,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:45:29,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009787490] [2021-08-29 12:45:29,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:45:29,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016246920] [2021-08-29 12:45:29,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016246920] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:45:29,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:45:29,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 12:45:29,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468083572] [2021-08-29 12:45:29,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 12:45:29,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:45:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 12:45:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:45:29,466 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2021-08-29 12:45:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:45:29,525 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2021-08-29 12:45:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 12:45:29,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 [2021-08-29 12:45:29,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:45:29,533 INFO L225 Difference]: With dead ends: 85 [2021-08-29 12:45:29,533 INFO L226 Difference]: Without dead ends: 55 [2021-08-29 12:45:29,533 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5.41ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:45:29,535 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.17ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.92ms IncrementalHoareTripleChecker+Time [2021-08-29 12:45:29,536 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 1.17ms Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 52.92ms Time] [2021-08-29 12:45:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-29 12:45:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-29 12:45:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 54 states have internal predecessors, (63), 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) [2021-08-29 12:45:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-08-29 12:45:29,541 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 20 [2021-08-29 12:45:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:45:29,541 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-08-29 12:45:29,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2021-08-29 12:45:29,541 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-08-29 12:45:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 12:45:29,542 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:45:29,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:45:29,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 12:45:29,756 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 [2021-08-29 12:45:29,757 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 12:45:29,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:45:29,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1887855967, now seen corresponding path program 1 times [2021-08-29 12:45:29,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:45:29,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55851098] [2021-08-29 12:45:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:29,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:45:29,764 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:45:29,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800040651] [2021-08-29 12:45:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:29,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:45:29,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:45:29,766 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) [2021-08-29 12:45:29,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 12:45:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:45:29,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 12:45:29,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:45:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:45:29,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:45:29,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:45:29,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55851098] [2021-08-29 12:45:29,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:45:29,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800040651] [2021-08-29 12:45:29,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800040651] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:45:29,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:45:29,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 12:45:29,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508861927] [2021-08-29 12:45:29,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 12:45:29,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:45:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 12:45:29,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-29 12:45:29,950 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-08-29 12:45:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:45:30,050 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-08-29 12:45:30,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 12:45:30,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 [2021-08-29 12:45:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:45:30,054 INFO L225 Difference]: With dead ends: 62 [2021-08-29 12:45:30,054 INFO L226 Difference]: Without dead ends: 60 [2021-08-29 12:45:30,055 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.02ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-29 12:45:30,056 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.66ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.65ms IncrementalHoareTripleChecker+Time [2021-08-29 12:45:30,057 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 166 Unknown, 0 Unchecked, 0.66ms Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 75.65ms Time] [2021-08-29 12:45:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-29 12:45:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-08-29 12:45:30,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 54 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) [2021-08-29 12:45:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-29 12:45:30,067 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2021-08-29 12:45:30,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:45:30,067 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-29 12:45:30,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-08-29 12:45:30,068 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-29 12:45:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 12:45:30,068 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:45:30,069 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:45:30,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 12:45:30,285 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 [2021-08-29 12:45:30,286 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 12:45:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:45:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1753227772, now seen corresponding path program 1 times [2021-08-29 12:45:30,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:45:30,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563366646] [2021-08-29 12:45:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:30,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:45:30,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:45:30,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209856152] [2021-08-29 12:45:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:30,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:45:30,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:45:30,304 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) [2021-08-29 12:45:30,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 12:45:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:45:30,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-29 12:45:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:45:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:45:30,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:45:30,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:45:30,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563366646] [2021-08-29 12:45:30,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:45:30,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209856152] [2021-08-29 12:45:30,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209856152] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:45:30,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:45:30,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 12:45:30,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812299074] [2021-08-29 12:45:30,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 12:45:30,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:45:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 12:45:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:45:30,544 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-08-29 12:45:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:45:30,638 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-08-29 12:45:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 12:45:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 [2021-08-29 12:45:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:45:30,639 INFO L225 Difference]: With dead ends: 67 [2021-08-29 12:45:30,639 INFO L226 Difference]: Without dead ends: 65 [2021-08-29 12:45:30,640 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.23ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:45:30,640 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.58ms IncrementalHoareTripleChecker+Time [2021-08-29 12:45:30,640 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 147 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 88.58ms Time] [2021-08-29 12:45:30,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-29 12:45:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2021-08-29 12:45:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 54 states have internal predecessors, (61), 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) [2021-08-29 12:45:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-08-29 12:45:30,645 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2021-08-29 12:45:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:45:30,646 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-08-29 12:45:30,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-08-29 12:45:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-08-29 12:45:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-29 12:45:30,647 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:45:30,647 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:45:30,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 12:45:30,848 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 [2021-08-29 12:45:30,848 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 12:45:30,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:45:30,849 INFO L82 PathProgramCache]: Analyzing trace with hash 29719088, now seen corresponding path program 1 times [2021-08-29 12:45:30,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:45:30,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960400837] [2021-08-29 12:45:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:30,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:45:30,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:45:30,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592796173] [2021-08-29 12:45:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:30,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:45:30,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:45:30,865 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) [2021-08-29 12:45:30,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 12:45:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:45:30,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 12:45:30,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:45:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:45:30,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:45:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:45:31,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:45:31,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960400837] [2021-08-29 12:45:31,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:45:31,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592796173] [2021-08-29 12:45:31,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592796173] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:45:31,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:45:31,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-29 12:45:31,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044929807] [2021-08-29 12:45:31,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 12:45:31,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:45:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 12:45:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-29 12:45:31,006 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-08-29 12:45:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:45:31,055 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-08-29 12:45:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 12:45:31,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 26 [2021-08-29 12:45:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:45:31,056 INFO L225 Difference]: With dead ends: 78 [2021-08-29 12:45:31,056 INFO L226 Difference]: Without dead ends: 38 [2021-08-29 12:45:31,056 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.46ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:45:31,057 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.42ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.98ms IncrementalHoareTripleChecker+Time [2021-08-29 12:45:31,057 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.42ms Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 41.98ms Time] [2021-08-29 12:45:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-29 12:45:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-08-29 12:45:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 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) [2021-08-29 12:45:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-08-29 12:45:31,060 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 26 [2021-08-29 12:45:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:45:31,060 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-08-29 12:45:31,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-08-29 12:45:31,060 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-08-29 12:45:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-29 12:45:31,061 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:45:31,061 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:45:31,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 12:45:31,281 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 [2021-08-29 12:45:31,281 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 12:45:31,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:45:31,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1666886870, now seen corresponding path program 1 times [2021-08-29 12:45:31,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:45:31,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244033585] [2021-08-29 12:45:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:31,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:45:31,291 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:45:31,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707062664] [2021-08-29 12:45:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:45:31,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:45:31,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:45:31,293 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) [2021-08-29 12:45:31,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 12:45:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 12:45:31,333 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 12:45:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 12:45:31,366 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 12:45:31,366 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 12:45:31,367 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2021-08-29 12:45:31,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2021-08-29 12:45:31,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2021-08-29 12:45:31,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2021-08-29 12:45:31,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2021-08-29 12:45:31,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2021-08-29 12:45:31,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 12:45:31,569 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 [2021-08-29 12:45:31,574 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 12:45:31,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 12:45:31 BoogieIcfgContainer [2021-08-29 12:45:31,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 12:45:31,612 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 12:45:31,612 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 12:45:31,612 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 12:45:31,613 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:45:26" (3/4) ... [2021-08-29 12:45:31,614 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 12:45:31,669 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 12:45:31,670 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 12:45:31,670 INFO L158 Benchmark]: Toolchain (without parser) took 5566.84ms. Allocated memory was 48.2MB in the beginning and 77.6MB in the end (delta: 29.4MB). Free memory was 24.2MB in the beginning and 31.1MB in the end (delta: -6.8MB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. [2021-08-29 12:45:31,671 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 48.2MB. Free memory was 30.4MB in the beginning and 30.4MB in the end (delta: 60.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:45:31,671 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.55ms. Allocated memory is still 58.7MB. Free memory was 43.6MB in the beginning and 42.3MB in the end (delta: 1.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 12:45:31,671 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.16ms. Allocated memory is still 58.7MB. Free memory was 42.3MB in the beginning and 40.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 12:45:31,671 INFO L158 Benchmark]: Boogie Preprocessor took 33.49ms. Allocated memory is still 58.7MB. Free memory was 40.4MB in the beginning and 39.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:45:31,671 INFO L158 Benchmark]: RCFGBuilder took 227.52ms. Allocated memory is still 58.7MB. Free memory was 39.2MB in the beginning and 29.3MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 12:45:31,672 INFO L158 Benchmark]: TraceAbstraction took 4954.68ms. Allocated memory was 58.7MB in the beginning and 77.6MB in the end (delta: 18.9MB). Free memory was 28.9MB in the beginning and 34.6MB in the end (delta: -5.8MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. [2021-08-29 12:45:31,672 INFO L158 Benchmark]: Witness Printer took 57.68ms. Allocated memory is still 77.6MB. Free memory was 34.6MB in the beginning and 31.1MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 12:45:31,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 48.2MB. Free memory was 30.4MB in the beginning and 30.4MB in the end (delta: 60.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.55ms. Allocated memory is still 58.7MB. Free memory was 43.6MB in the beginning and 42.3MB in the end (delta: 1.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.16ms. Allocated memory is still 58.7MB. Free memory was 42.3MB in the beginning and 40.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.49ms. Allocated memory is still 58.7MB. Free memory was 40.4MB in the beginning and 39.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 227.52ms. Allocated memory is still 58.7MB. Free memory was 39.2MB in the beginning and 29.3MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4954.68ms. Allocated memory was 58.7MB in the beginning and 77.6MB in the end (delta: 18.9MB). Free memory was 28.9MB in the beginning and 34.6MB in the end (delta: -5.8MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. * Witness Printer took 57.68ms. Allocated memory is still 77.6MB. Free memory was 34.6MB in the beginning and 31.1MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L40] EXPR counter++ VAL [counter=1] [L40] COND TRUE counter++<2 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=1] [L46] EXPR counter++ VAL [counter=2] [L46] COND TRUE counter++<2 [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L51] COND TRUE !(c >= b) VAL [counter=2] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=2] [L40] EXPR counter++ VAL [counter=3] [L40] COND FALSE !(counter++<2) [L11] COND TRUE !(cond) VAL [counter=3] [L13] reach_error() VAL [counter=3] - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 4838.90ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 13.48ms, AutomataDifference: 986.49ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 8.75ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 300 SdHoareTripleChecker+Valid, 735.12ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 300 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 579.23ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 525 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1171 IncrementalHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 0 mSDtfsCounter, 1171 mSolverCounterSat, 9.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 180 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 187.77ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=5, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 87.30ms AutomataMinimizationTime, 9 MinimizatonAttempts, 76 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 62.57ms SsaConstructionTime, 167.33ms SatisfiabilityAnalysisTime, 968.43ms InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 853 SizeOfPredicates, 38 NumberOfNonLiveVariables, 885 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 6/8 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! [2021-08-29 12:45:31,716 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...