./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i --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/divbin_unwindbound2.i -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 18c029257c8319cd9595edc065346f5d5f2a5d97 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 12:34:22,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 12:34:22,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 12:34:22,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 12:34:22,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 12:34:22,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 12:34:22,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 12:34:22,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 12:34:22,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 12:34:22,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 12:34:22,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 12:34:22,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 12:34:22,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 12:34:22,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 12:34:22,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 12:34:22,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 12:34:22,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 12:34:22,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 12:34:22,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 12:34:22,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 12:34:22,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 12:34:22,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 12:34:22,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 12:34:22,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 12:34:22,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 12:34:22,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 12:34:22,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 12:34:22,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 12:34:22,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 12:34:22,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 12:34:22,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 12:34:22,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 12:34:22,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 12:34:22,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 12:34:22,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 12:34:22,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 12:34:22,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 12:34:22,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 12:34:22,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 12:34:22,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 12:34:22,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 12:34:22,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 12:34:22,558 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 12:34:22,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 12:34:22,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 12:34:22,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 12:34:22,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 12:34:22,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 12:34:22,560 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 12:34:22,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 12:34:22,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 12:34:22,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 12:34:22,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 12:34:22,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 12:34:22,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 12:34:22,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 12:34:22,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 12:34:22,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 12:34:22,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 12:34:22,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 12:34:22,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 12:34:22,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 12:34:22,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 12:34:22,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 12:34:22,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:34:22,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 12:34:22,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 12:34:22,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 12:34:22,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 12:34:22,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 12:34:22,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 12:34:22,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 12:34:22,565 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18c029257c8319cd9595edc065346f5d5f2a5d97 [2021-08-29 12:34:22,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 12:34:22,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 12:34:22,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 12:34:22,925 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 12:34:22,926 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 12:34:22,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i [2021-08-29 12:34:22,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab9628ee/79498268df444bdeb1a3c7fe19c70940/FLAG798b33809 [2021-08-29 12:34:23,432 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 12:34:23,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound2.i [2021-08-29 12:34:23,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab9628ee/79498268df444bdeb1a3c7fe19c70940/FLAG798b33809 [2021-08-29 12:34:23,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab9628ee/79498268df444bdeb1a3c7fe19c70940 [2021-08-29 12:34:23,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 12:34:23,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 12:34:23,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 12:34:23,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 12:34:23,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 12:34:23,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:34:23" (1/1) ... [2021-08-29 12:34:23,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64244667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:23, skipping insertion in model container [2021-08-29 12:34:23,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 12:34:23" (1/1) ... [2021-08-29 12:34:23,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 12:34:23,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 12:34:23,980 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/divbin_unwindbound2.i[958,971] [2021-08-29 12:34:23,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:34:24,000 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 12:34:24,011 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/divbin_unwindbound2.i[958,971] [2021-08-29 12:34:24,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 12:34:24,027 INFO L208 MainTranslator]: Completed translation [2021-08-29 12:34:24,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24 WrapperNode [2021-08-29 12:34:24,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 12:34:24,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 12:34:24,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 12:34:24,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 12:34:24,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (1/1) ... [2021-08-29 12:34:24,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (1/1) ... [2021-08-29 12:34:24,057 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 12:34:24,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 12:34:24,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 12:34:24,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 12:34:24,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (1/1) ... [2021-08-29 12:34:24,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (1/1) ... [2021-08-29 12:34:24,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (1/1) ... [2021-08-29 12:34:24,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (1/1) ... [2021-08-29 12:34:24,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (1/1) ... [2021-08-29 12:34:24,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (1/1) ... [2021-08-29 12:34:24,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (1/1) ... [2021-08-29 12:34:24,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 12:34:24,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 12:34:24,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 12:34:24,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 12:34:24,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (1/1) ... [2021-08-29 12:34:24,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 12:34:24,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:34:24,117 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 12:34:24,135 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 12:34:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 12:34:24,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 12:34:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 12:34:24,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 12:34:24,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-08-29 12:34:24,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 12:34:24,267 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-08-29 12:34:24,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:34:24 BoogieIcfgContainer [2021-08-29 12:34:24,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 12:34:24,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 12:34:24,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 12:34:24,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 12:34:24,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 12:34:23" (1/3) ... [2021-08-29 12:34:24,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25768452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:34:24, skipping insertion in model container [2021-08-29 12:34:24,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 12:34:24" (2/3) ... [2021-08-29 12:34:24,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25768452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 12:34:24, skipping insertion in model container [2021-08-29 12:34:24,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:34:24" (3/3) ... [2021-08-29 12:34:24,275 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound2.i [2021-08-29 12:34:24,280 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 12:34:24,280 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-29 12:34:24,318 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 12:34:24,325 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 12:34:24,325 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-29 12:34:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 12:34:24,342 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:34:24,342 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:34:24,343 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:34:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:34:24,348 INFO L82 PathProgramCache]: Analyzing trace with hash 344827834, now seen corresponding path program 1 times [2021-08-29 12:34:24,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:34:24,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592318629] [2021-08-29 12:34:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:24,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:34:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:34:24,488 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 12:34:24,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:34:24,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592318629] [2021-08-29 12:34:24,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592318629] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:34:24,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:34:24,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 12:34:24,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53639761] [2021-08-29 12:34:24,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 12:34:24,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:34:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 12:34:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 12:34:24,520 INFO L87 Difference]: Start difference. First operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:34:24,628 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-08-29 12:34:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 12:34:24,631 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 12:34:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:34:24,637 INFO L225 Difference]: With dead ends: 45 [2021-08-29 12:34:24,637 INFO L226 Difference]: Without dead ends: 20 [2021-08-29 12:34:24,640 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 12:34:24,643 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.48ms IncrementalHoareTripleChecker+Time [2021-08-29 12:34:24,644 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.39ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 92.48ms Time] [2021-08-29 12:34:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-29 12:34:24,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-29 12:34:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-08-29 12:34:24,669 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-08-29 12:34:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:34:24,669 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-08-29 12:34:24,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-08-29 12:34:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 12:34:24,671 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:34:24,671 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:34:24,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 12:34:24,671 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:34:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:34:24,672 INFO L82 PathProgramCache]: Analyzing trace with hash 514095505, now seen corresponding path program 1 times [2021-08-29 12:34:24,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:34:24,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838013748] [2021-08-29 12:34:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:24,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:34:24,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:34:24,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694851627] [2021-08-29 12:34:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:24,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:34:24,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:34:24,689 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 12:34:24,690 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 12:34:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:34:24,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 12:34:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:34:24,813 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 12:34:24,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:34:24,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:34:24,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838013748] [2021-08-29 12:34:24,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:34:24,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694851627] [2021-08-29 12:34:24,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694851627] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:34:24,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:34:24,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 12:34:24,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389035207] [2021-08-29 12:34:24,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 12:34:24,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:34:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 12:34:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:34:24,824 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:34:24,876 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-08-29 12:34:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 12:34:24,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 12:34:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:34:24,878 INFO L225 Difference]: With dead ends: 33 [2021-08-29 12:34:24,878 INFO L226 Difference]: Without dead ends: 22 [2021-08-29 12:34:24,878 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.10ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 12:34:24,879 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.78ms IncrementalHoareTripleChecker+Time [2021-08-29 12:34:24,880 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.89ms Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 44.78ms Time] [2021-08-29 12:34:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-29 12:34:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-29 12:34:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.3) internal successors, (26), 21 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 12:34:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-08-29 12:34:24,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2021-08-29 12:34:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:34:24,885 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-08-29 12:34:24,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:24,885 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-08-29 12:34:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 12:34:24,886 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:34:24,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:34:24,914 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 12:34:25,101 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 12:34:25,102 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:34:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:34:25,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1194113768, now seen corresponding path program 1 times [2021-08-29 12:34:25,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:34:25,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483124418] [2021-08-29 12:34:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:25,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:34:25,125 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:34:25,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227141774] [2021-08-29 12:34:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:25,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:34:25,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:34:25,127 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 12:34:25,154 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 12:34:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:34:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-29 12:34:25,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:34:25,589 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 12:34:25,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:34:25,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:34:25,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483124418] [2021-08-29 12:34:25,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:34:25,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227141774] [2021-08-29 12:34:25,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227141774] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:34:25,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:34:25,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-29 12:34:25,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143728023] [2021-08-29 12:34:25,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 12:34:25,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:34:25,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 12:34:25,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:34:25,592 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:27,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 12:34:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:34:27,980 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-08-29 12:34:27,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 12:34:27,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-29 12:34:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:34:27,981 INFO L225 Difference]: With dead ends: 38 [2021-08-29 12:34:27,981 INFO L226 Difference]: Without dead ends: 31 [2021-08-29 12:34:27,982 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 123.25ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-29 12:34:27,983 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2124.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.68ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2285.79ms IncrementalHoareTripleChecker+Time [2021-08-29 12:34:27,984 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 118 Unknown, 0 Unchecked, 7.68ms Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 1 Unknown, 0 Unchecked, 2285.79ms Time] [2021-08-29 12:34:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-29 12:34:27,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-08-29 12:34:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-08-29 12:34:27,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 13 [2021-08-29 12:34:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:34:27,989 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-08-29 12:34:27,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:27,990 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-08-29 12:34:27,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 12:34:27,990 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:34:27,991 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:34:28,021 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 12:34:28,207 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 12:34:28,208 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:34:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:34:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash 483460221, now seen corresponding path program 1 times [2021-08-29 12:34:28,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:34:28,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735676772] [2021-08-29 12:34:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:28,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:34:28,229 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:34:28,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235161677] [2021-08-29 12:34:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:28,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:34:28,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:34:28,237 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 12:34:28,253 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 12:34:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:34:28,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 12:34:28,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:34:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:34:28,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:34:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:34:28,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:34:28,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735676772] [2021-08-29 12:34:28,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:34:28,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235161677] [2021-08-29 12:34:28,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235161677] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:34:28,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:34:28,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-29 12:34:28,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870623620] [2021-08-29 12:34:28,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 12:34:28,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:34:28,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 12:34:28,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 12:34:28,439 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 12:34:28,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:34:28,522 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-08-29 12:34:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 12:34:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 12:34:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:34:28,528 INFO L225 Difference]: With dead ends: 40 [2021-08-29 12:34:28,528 INFO L226 Difference]: Without dead ends: 29 [2021-08-29 12:34:28,529 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.77ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-29 12:34:28,530 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.56ms IncrementalHoareTripleChecker+Time [2021-08-29 12:34:28,530 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 66.56ms Time] [2021-08-29 12:34:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-29 12:34:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-29 12:34:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-08-29 12:34:28,535 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2021-08-29 12:34:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:34:28,535 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-08-29 12:34:28,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 12:34:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-08-29 12:34:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 12:34:28,536 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:34:28,536 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:34:28,571 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 12:34:28,749 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 12:34:28,749 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:34:28,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:34:28,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2143807572, now seen corresponding path program 1 times [2021-08-29 12:34:28,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:34:28,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264758942] [2021-08-29 12:34:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:28,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:34:28,763 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:34:28,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528493513] [2021-08-29 12:34:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:28,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:34:28,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:34:28,766 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 12:34:28,767 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 12:34:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:34:28,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 12:34:28,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:34:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:34:28,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:34:28,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:34:28,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264758942] [2021-08-29 12:34:28,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:34:28,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528493513] [2021-08-29 12:34:28,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528493513] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:34:28,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:34:28,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 12:34:28,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720660044] [2021-08-29 12:34:28,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 12:34:28,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:34:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 12:34:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-29 12:34:28,914 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 12:34:29,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:34:29,014 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-08-29 12:34:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 12:34:29,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 12:34:29,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:34:29,015 INFO L225 Difference]: With dead ends: 36 [2021-08-29 12:34:29,016 INFO L226 Difference]: Without dead ends: 25 [2021-08-29 12:34:29,016 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.62ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:34:29,017 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.94ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.54ms IncrementalHoareTripleChecker+Time [2021-08-29 12:34:29,017 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 3.94ms Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 77.54ms Time] [2021-08-29 12:34:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-29 12:34:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-29 12:34:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-29 12:34:29,020 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-08-29 12:34:29,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:34:29,022 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-29 12:34:29,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 12:34:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-29 12:34:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 12:34:29,024 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:34:29,024 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:34:29,052 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 12:34:29,224 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 12:34:29,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:34:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:34:29,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2033562946, now seen corresponding path program 1 times [2021-08-29 12:34:29,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:34:29,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450099512] [2021-08-29 12:34:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:29,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:34:29,235 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:34:29,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075406492] [2021-08-29 12:34:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:29,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:34:29,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:34:29,236 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 12:34:29,248 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 12:34:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:34:29,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 12:34:29,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:34:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:34:30,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:34:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:34:30,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:34:30,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450099512] [2021-08-29 12:34:30,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:34:30,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075406492] [2021-08-29 12:34:30,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075406492] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:34:30,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:34:30,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2021-08-29 12:34:30,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100980360] [2021-08-29 12:34:30,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 12:34:30,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:34:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 12:34:30,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-29 12:34:30,526 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 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 12:34:34,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 12:34:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:34:37,450 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-08-29 12:34:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-29 12:34:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-29 12:34:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:34:37,452 INFO L225 Difference]: With dead ends: 66 [2021-08-29 12:34:37,452 INFO L226 Difference]: Without dead ends: 56 [2021-08-29 12:34:37,453 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 3583.31ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-08-29 12:34:37,453 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 156 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3531.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.25ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3739.51ms IncrementalHoareTripleChecker+Time [2021-08-29 12:34:37,454 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 0 Invalid, 272 Unknown, 0 Unchecked, 4.25ms Time], IncrementalHoareTripleChecker [23 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 3739.51ms Time] [2021-08-29 12:34:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-29 12:34:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2021-08-29 12:34:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 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 12:34:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-08-29 12:34:37,462 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 17 [2021-08-29 12:34:37,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:34:37,463 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-08-29 12:34:37,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 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 12:34:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-08-29 12:34:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 12:34:37,464 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:34:37,464 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:34:37,483 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 12:34:37,665 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 12:34:37,665 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:34:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:34:37,666 INFO L82 PathProgramCache]: Analyzing trace with hash 348654179, now seen corresponding path program 1 times [2021-08-29 12:34:37,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:34:37,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764657291] [2021-08-29 12:34:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:37,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:34:37,677 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:34:37,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614402938] [2021-08-29 12:34:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:37,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:34:37,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:34:37,679 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 12:34:37,681 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 12:34:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:34:37,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 12:34:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:34:37,762 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 12:34:37,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 12:34:37,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:34:37,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764657291] [2021-08-29 12:34:37,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:34:37,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614402938] [2021-08-29 12:34:37,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614402938] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 12:34:37,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 12:34:37,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 12:34:37,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450608994] [2021-08-29 12:34:37,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 12:34:37,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:34:37,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 12:34:37,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 12:34:37,770 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:34:37,811 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-08-29 12:34:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 12:34:37,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-29 12:34:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:34:37,812 INFO L225 Difference]: With dead ends: 38 [2021-08-29 12:34:37,812 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 12:34:37,812 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.35ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 12:34:37,813 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.23ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.92ms IncrementalHoareTripleChecker+Time [2021-08-29 12:34:37,813 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 33 Unknown, 0 Unchecked, 0.23ms Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 34.92ms Time] [2021-08-29 12:34:37,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 12:34:37,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-29 12:34:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-08-29 12:34:37,817 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2021-08-29 12:34:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:34:37,817 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-08-29 12:34:37,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 12:34:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-08-29 12:34:37,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 12:34:37,818 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 12:34:37,818 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 12:34:37,837 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 12:34:38,019 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 12:34:38,019 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 12:34:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 12:34:38,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1228783757, now seen corresponding path program 1 times [2021-08-29 12:34:38,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 12:34:38,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862492365] [2021-08-29 12:34:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:38,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 12:34:38,033 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 12:34:38,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643093255] [2021-08-29 12:34:38,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 12:34:38,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 12:34:38,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 12:34:38,035 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 12:34:38,042 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 12:34:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 12:34:38,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 12:34:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 12:34:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:34:38,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 12:34:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 12:34:38,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 12:34:38,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862492365] [2021-08-29 12:34:38,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 12:34:38,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643093255] [2021-08-29 12:34:38,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643093255] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 12:34:38,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 12:34:38,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-29 12:34:38,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624774092] [2021-08-29 12:34:38,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 12:34:38,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 12:34:38,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 12:34:38,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-29 12:34:38,206 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) 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 12:34:38,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 12:34:38,244 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-08-29 12:34:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 12:34:38,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) 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 12:34:38,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 12:34:38,244 INFO L225 Difference]: With dead ends: 27 [2021-08-29 12:34:38,244 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 12:34:38,245 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.25ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-29 12:34:38,245 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.22ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.89ms IncrementalHoareTripleChecker+Time [2021-08-29 12:34:38,245 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 35 Unknown, 0 Unchecked, 0.22ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 28.89ms Time] [2021-08-29 12:34:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 12:34:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 12:34:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 12:34:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 12:34:38,246 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-08-29 12:34:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 12:34:38,246 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 12:34:38,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) 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 12:34:38,246 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 12:34:38,247 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 12:34:38,249 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-08-29 12:34:38,249 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-08-29 12:34:38,277 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 12:34:38,450 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 12:34:38,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 12:34:38,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:34:38,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:34:38,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:34:38,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 12:34:47,088 WARN L210 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-08-29 12:34:47,091 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-08-29 12:34:47,091 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-08-29 12:34:47,091 INFO L854 garLoopResultBuilder]: At program point L19-2(line 42) the Hoare annotation is: (and (<= 2 ~counter~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (< (mod ULTIMATE.start_main_~r~0 4294967296) (mod ULTIMATE.start_main_~b~0 4294967296)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~A~0 ULTIMATE.start_main_~r~0) (< (mod ULTIMATE.start_main_~B~0 4294967296) 2147483647) (= ULTIMATE.start_main_~q~0 0) (= ULTIMATE.start_main_~B~0 ULTIMATE.start_main_~b~0)) [2021-08-29 12:34:47,092 INFO L858 garLoopResultBuilder]: For program point L19-3(lines 19 22) no Hoare annotation was computed. [2021-08-29 12:34:47,092 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-08-29 12:34:47,092 INFO L858 garLoopResultBuilder]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2021-08-29 12:34:47,092 INFO L861 garLoopResultBuilder]: At program point L19-5(lines 18 24) the Hoare annotation is: true [2021-08-29 12:34:47,092 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 49) no Hoare annotation was computed. [2021-08-29 12:34:47,092 INFO L858 garLoopResultBuilder]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2021-08-29 12:34:47,092 INFO L858 garLoopResultBuilder]: For program point L36-1(lines 36 39) no Hoare annotation was computed. [2021-08-29 12:34:47,093 INFO L854 garLoopResultBuilder]: At program point L36-3(lines 36 39) the Hoare annotation is: (let ((.cse9 (mod ULTIMATE.start_main_~B~0 4294967296))) (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse6 (mod ULTIMATE.start_main_~r~0 4294967296)) (.cse1 (<= 1 .cse9)) (.cse2 (= ULTIMATE.start_main_~A~0 ULTIMATE.start_main_~r~0)) (.cse3 (< .cse9 2147483647)) (.cse4 (= ULTIMATE.start_main_~q~0 0))) (or (and .cse0 (<= 0 ~counter~0) (<= ~counter~0 0) .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~B~0 ULTIMATE.start_main_~b~0)) (let ((.cse5 (mod ULTIMATE.start_main_~A~0 4294967296))) (and (<= 2 ~counter~0) .cse0 .cse1 .cse3 (= (mod (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~b~0)) 4294967296) .cse5) (let ((.cse7 (* ULTIMATE.start_main_~b~0 2))) (or (< .cse6 (mod ULTIMATE.start_main_~b~0 4294967296)) (= (mod (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 .cse7)) 4294967296) .cse5) (<= (mod .cse7 4294967296) .cse6))))) (let ((.cse8 (mod (div (- ULTIMATE.start_main_~b~0) (- 2)) 4294967296))) (and (= (mod ULTIMATE.start_main_~b~0 (- 2)) 0) .cse0 (< .cse8 2147483647) (<= 1 .cse8) (<= .cse8 .cse6) (<= 1 ~counter~0) .cse1 .cse2 .cse3 .cse4))))) [2021-08-29 12:34:47,093 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 12:34:47,093 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 12:34:47,093 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 12:34:47,093 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-08-29 12:34:47,093 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-08-29 12:34:47,094 INFO L858 garLoopResultBuilder]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2021-08-29 12:34:47,094 INFO L858 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-08-29 12:34:47,094 INFO L858 garLoopResultBuilder]: For program point L16-2(line 16) no Hoare annotation was computed. [2021-08-29 12:34:47,094 INFO L858 garLoopResultBuilder]: For program point L45(lines 45 48) no Hoare annotation was computed. [2021-08-29 12:34:47,094 INFO L858 garLoopResultBuilder]: For program point L45-2(lines 26 52) no Hoare annotation was computed. [2021-08-29 12:34:47,094 INFO L858 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2021-08-29 12:34:47,094 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 12:34:47,094 INFO L861 garLoopResultBuilder]: At program point L51(lines 26 52) the Hoare annotation is: true [2021-08-29 12:34:47,099 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 12:34:47,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 12:34:47 BoogieIcfgContainer [2021-08-29 12:34:47,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 12:34:47,114 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 12:34:47,114 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 12:34:47,114 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 12:34:47,115 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 12:34:24" (3/4) ... [2021-08-29 12:34:47,117 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 12:34:47,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-29 12:34:47,127 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 12:34:47,127 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 12:34:47,127 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 12:34:47,165 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 12:34:47,165 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 12:34:47,166 INFO L158 Benchmark]: Toolchain (without parser) took 23325.93ms. Allocated memory was 54.5MB in the beginning and 81.8MB in the end (delta: 27.3MB). Free memory was 31.8MB in the beginning and 50.5MB in the end (delta: -18.7MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2021-08-29 12:34:47,166 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 54.5MB. Free memory was 37.1MB in the beginning and 37.1MB in the end (delta: 37.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:34:47,167 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.87ms. Allocated memory is still 54.5MB. Free memory was 31.6MB in the beginning and 35.3MB in the end (delta: -3.7MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2021-08-29 12:34:47,167 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.72ms. Allocated memory is still 54.5MB. Free memory was 35.3MB in the beginning and 33.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 12:34:47,167 INFO L158 Benchmark]: Boogie Preprocessor took 18.16ms. Allocated memory is still 54.5MB. Free memory was 33.7MB in the beginning and 32.8MB in the end (delta: 957.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 12:34:47,167 INFO L158 Benchmark]: RCFGBuilder took 191.94ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 32.6MB in the beginning and 49.7MB in the end (delta: -17.1MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2021-08-29 12:34:47,168 INFO L158 Benchmark]: TraceAbstraction took 22843.43ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 49.3MB in the beginning and 53.3MB in the end (delta: -4.0MB). Peak memory consumption was 39.2MB. Max. memory is 16.1GB. [2021-08-29 12:34:47,168 INFO L158 Benchmark]: Witness Printer took 51.50ms. Allocated memory is still 81.8MB. Free memory was 53.3MB in the beginning and 50.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 12:34:47,169 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 54.5MB. Free memory was 37.1MB in the beginning and 37.1MB in the end (delta: 37.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.87ms. Allocated memory is still 54.5MB. Free memory was 31.6MB in the beginning and 35.3MB in the end (delta: -3.7MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.72ms. Allocated memory is still 54.5MB. Free memory was 35.3MB in the beginning and 33.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 18.16ms. Allocated memory is still 54.5MB. Free memory was 33.7MB in the beginning and 32.8MB in the end (delta: 957.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 191.94ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 32.6MB in the beginning and 49.7MB in the end (delta: -17.1MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * TraceAbstraction took 22843.43ms. Allocated memory was 67.1MB in the beginning and 81.8MB in the end (delta: 14.7MB). Free memory was 49.3MB in the beginning and 53.3MB in the end (delta: -4.0MB). Peak memory consumption was 39.2MB. Max. memory is 16.1GB. * Witness Printer took 51.50ms. Allocated memory is still 81.8MB. Free memory was 53.3MB in the beginning and 50.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 22781.85ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 12.92ms, AutomataDifference: 9810.05ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 8639.81ms, InitialAbstractionConstructionTime: 8.39ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 227 SdHoareTripleChecker+Valid, 6370.47ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 227 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 5932.68ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 310 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 660 IncrementalHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 0 mSDtfsCounter, 660 mSolverCounterSat, 18.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 180 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3782.69ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=6, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 40.33ms AutomataMinimizationTime, 8 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 10 NumberOfFragments, 175 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 42.55ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 28 FormulaSimplificationTreeSizeReductionInter, 8590.26ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 44.06ms SsaConstructionTime, 126.10ms SatisfiabilityAnalysisTime, 2207.38ms InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 168 ConstructedInterpolants, 0 QuantifiedInterpolants, 913 SizeOfPredicates, 23 NumberOfNonLiveVariables, 492 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 31/45 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((2 <= counter && cond == 1) && r % 4294967296 < b % 4294967296) && 1 <= cond) && A == r) && B % 4294967296 < 2147483647) && q == 0) && B == b - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((((cond == 1 && 0 <= counter) && counter <= 0) && 1 <= B % 4294967296) && A == r) && B % 4294967296 < 2147483647) && q == 0) && B == b) || (((((2 <= counter && cond == 1) && 1 <= B % 4294967296) && B % 4294967296 < 2147483647) && (r + q * b) % 4294967296 == A % 4294967296) && ((r % 4294967296 < b % 4294967296 || (r + q * (b * 2)) % 4294967296 == A % 4294967296) || b * 2 % 4294967296 <= r % 4294967296))) || (((((((((b % -2 == 0 && cond == 1) && -b / -2 % 4294967296 < 2147483647) && 1 <= -b / -2 % 4294967296) && -b / -2 % 4294967296 <= r % 4294967296) && 1 <= counter) && 1 <= B % 4294967296) && A == r) && B % 4294967296 < 2147483647) && q == 0) RESULT: Ultimate proved your program to be correct! [2021-08-29 12:34:47,219 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...