./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4564eb416289e9a7ffc515b1b5d6a03a62cf5822 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 07:52:34,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 07:52:34,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 07:52:34,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 07:52:34,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 07:52:34,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 07:52:34,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 07:52:34,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 07:52:34,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 07:52:34,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 07:52:34,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 07:52:35,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 07:52:35,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 07:52:35,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 07:52:35,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 07:52:35,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 07:52:35,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 07:52:35,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 07:52:35,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 07:52:35,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 07:52:35,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 07:52:35,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 07:52:35,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 07:52:35,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 07:52:35,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 07:52:35,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 07:52:35,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 07:52:35,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 07:52:35,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 07:52:35,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 07:52:35,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 07:52:35,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 07:52:35,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 07:52:35,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 07:52:35,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 07:52:35,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 07:52:35,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 07:52:35,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 07:52:35,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 07:52:35,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 07:52:35,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 07:52:35,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 07:52:35,101 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 07:52:35,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 07:52:35,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 07:52:35,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 07:52:35,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 07:52:35,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 07:52:35,105 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 07:52:35,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 07:52:35,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 07:52:35,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 07:52:35,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 07:52:35,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 07:52:35,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 07:52:35,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 07:52:35,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 07:52:35,107 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 07:52:35,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 07:52:35,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 07:52:35,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 07:52:35,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 07:52:35,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 07:52:35,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 07:52:35,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:52:35,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 07:52:35,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 07:52:35,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 07:52:35,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 07:52:35,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 07:52:35,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 07:52:35,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 07:52:35,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4564eb416289e9a7ffc515b1b5d6a03a62cf5822 [2021-08-26 07:52:35,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 07:52:35,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 07:52:35,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 07:52:35,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 07:52:35,427 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 07:52:35,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c [2021-08-26 07:52:35,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203235574/e4f560b487e14f46866058596103d0dc/FLAG55586efa4 [2021-08-26 07:52:35,928 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 07:52:35,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound50.c [2021-08-26 07:52:35,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203235574/e4f560b487e14f46866058596103d0dc/FLAG55586efa4 [2021-08-26 07:52:36,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203235574/e4f560b487e14f46866058596103d0dc [2021-08-26 07:52:36,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 07:52:36,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 07:52:36,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 07:52:36,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 07:52:36,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 07:52:36,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4bc9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36, skipping insertion in model container [2021-08-26 07:52:36,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 07:52:36,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 07:52:36,454 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/ps2-ll_unwindbound50.c[454,467] [2021-08-26 07:52:36,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:52:36,470 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 07:52:36,479 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/ps2-ll_unwindbound50.c[454,467] [2021-08-26 07:52:36,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:52:36,495 INFO L208 MainTranslator]: Completed translation [2021-08-26 07:52:36,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36 WrapperNode [2021-08-26 07:52:36,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 07:52:36,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 07:52:36,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 07:52:36,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 07:52:36,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 07:52:36,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 07:52:36,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 07:52:36,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 07:52:36,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 07:52:36,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 07:52:36,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 07:52:36,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 07:52:36,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (1/1) ... [2021-08-26 07:52:36,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:52:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:52:36,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 07:52:36,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 07:52:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 07:52:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 07:52:36,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 07:52:36,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 07:52:36,834 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 07:52:36,834 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 07:52:36,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:52:36 BoogieIcfgContainer [2021-08-26 07:52:36,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 07:52:36,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 07:52:36,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 07:52:36,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 07:52:36,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:52:36" (1/3) ... [2021-08-26 07:52:36,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71780736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:52:36, skipping insertion in model container [2021-08-26 07:52:36,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:52:36" (2/3) ... [2021-08-26 07:52:36,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71780736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:52:36, skipping insertion in model container [2021-08-26 07:52:36,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:52:36" (3/3) ... [2021-08-26 07:52:36,849 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound50.c [2021-08-26 07:52:36,853 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 07:52:36,853 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 07:52:36,889 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 07:52:36,895 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 07:52:36,896 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 07:52:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 07:52:36,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:52:36,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 07:52:36,912 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:52:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:52:36,916 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-08-26 07:52:36,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:52:36,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833704026] [2021-08-26 07:52:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:52:36,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:52:37,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:52:37,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998916448] [2021-08-26 07:52:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:52:37,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:52:37,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:52:37,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:52:37,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 07:52:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:52:37,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 07:52:37,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:52:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:52:37,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:52:37,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833704026] [2021-08-26 07:52:37,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:52:37,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998916448] [2021-08-26 07:52:37,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998916448] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:52:37,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:52:37,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 07:52:37,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429695553] [2021-08-26 07:52:37,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:52:37,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:52:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:52:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:52:37,312 INFO L87 Difference]: Start difference. First operand has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:52:37,386 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-08-26 07:52:37,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:52:37,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-08-26 07:52:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:52:37,394 INFO L225 Difference]: With dead ends: 44 [2021-08-26 07:52:37,394 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 07:52:37,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:52:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 07:52:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-08-26 07:52:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-26 07:52:37,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2021-08-26 07:52:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:52:37,425 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-26 07:52:37,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-26 07:52:37,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 07:52:37,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:52:37,427 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 07:52:37,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 07:52:37,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-08-26 07:52:37,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:52:37,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:52:37,650 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-08-26 07:52:37,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:52:37,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317936169] [2021-08-26 07:52:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:52:37,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:52:37,669 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:52:37,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187101500] [2021-08-26 07:52:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:52:37,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:52:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:52:37,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:52:37,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 07:52:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:52:37,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 07:52:37,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:52:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:52:37,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:52:37,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317936169] [2021-08-26 07:52:37,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:52:37,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187101500] [2021-08-26 07:52:37,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187101500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:52:37,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:52:37,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:52:37,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362196376] [2021-08-26 07:52:37,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:52:37,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:52:37,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:52:37,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:52:37,909 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:52:37,982 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-08-26 07:52:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:52:37,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-26 07:52:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:52:37,985 INFO L225 Difference]: With dead ends: 29 [2021-08-26 07:52:37,985 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 07:52:37,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:52:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 07:52:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-08-26 07:52:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-26 07:52:37,990 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2021-08-26 07:52:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:52:37,991 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-26 07:52:37,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-26 07:52:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 07:52:37,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:52:37,993 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-08-26 07:52:38,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 07:52:38,213 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,SelfDestructingSolverStorable1 [2021-08-26 07:52:38,214 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:52:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:52:38,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2021-08-26 07:52:38,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:52:38,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718050928] [2021-08-26 07:52:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:52:38,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:52:38,240 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:52:38,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698460550] [2021-08-26 07:52:38,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:52:38,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:52:38,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:52:38,243 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:52:38,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 07:52:38,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:52:38,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:52:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 07:52:38,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:52:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:52:38,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:52:38,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718050928] [2021-08-26 07:52:38,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:52:38,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698460550] [2021-08-26 07:52:38,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698460550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:52:38,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:52:38,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 07:52:38,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943378883] [2021-08-26 07:52:38,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:52:38,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:52:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:52:38,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:52:38,421 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:52:38,480 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-08-26 07:52:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:52:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 07:52:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:52:38,481 INFO L225 Difference]: With dead ends: 33 [2021-08-26 07:52:38,482 INFO L226 Difference]: Without dead ends: 27 [2021-08-26 07:52:38,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:52:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-26 07:52:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-08-26 07:52:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-26 07:52:38,487 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2021-08-26 07:52:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:52:38,487 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-26 07:52:38,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-26 07:52:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 07:52:38,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:52:38,488 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-08-26 07:52:38,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-26 07:52:38,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:52:38,705 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:52:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:52:38,706 INFO L82 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2021-08-26 07:52:38,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:52:38,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287404687] [2021-08-26 07:52:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:52:38,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:52:38,717 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:52:38,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157968466] [2021-08-26 07:52:38,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 07:52:38,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:52:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:52:38,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:52:38,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 07:52:38,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 07:52:38,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:52:38,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 07:52:38,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:52:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-26 07:52:38,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:52:38,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287404687] [2021-08-26 07:52:38,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:52:38,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157968466] [2021-08-26 07:52:38,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157968466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:52:38,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:52:38,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:52:38,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973698845] [2021-08-26 07:52:38,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:52:38,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:52:38,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:52:38,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:52:38,945 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:52:38,984 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-08-26 07:52:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 07:52:38,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 18 [2021-08-26 07:52:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:52:38,985 INFO L225 Difference]: With dead ends: 24 [2021-08-26 07:52:38,985 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 07:52:38,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:52:38,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 07:52:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 07:52:38,986 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) [2021-08-26 07:52:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 07:52:38,987 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-08-26 07:52:38,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:52:38,987 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 07:52:38,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:52:38,987 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 07:52:38,987 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 07:52:38,990 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:52:38,990 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:52:39,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 07:52:39,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:52:39,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 07:52:39,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:52:39,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:52:39,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:52:39,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:52:39,275 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 07:52:39,275 INFO L857 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2021-08-26 07:52:39,275 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-08-26 07:52:39,276 INFO L853 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse0 (= (+ ULTIMATE.start_main_~y~0 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (* 2 ULTIMATE.start_main_~x~0)))) (or (and .cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (and (= ULTIMATE.start_main_~y~0 0) .cse0))) [2021-08-26 07:52:39,276 INFO L857 garLoopResultBuilder]: For program point L27-4(lines 27 36) no Hoare annotation was computed. [2021-08-26 07:52:39,276 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-08-26 07:52:39,276 INFO L857 garLoopResultBuilder]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2021-08-26 07:52:39,276 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 07:52:39,276 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 07:52:39,276 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 07:52:39,276 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-08-26 07:52:39,277 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-08-26 07:52:39,277 INFO L853 garLoopResultBuilder]: At program point L10-2(lines 30 31) the Hoare annotation is: (and (= (+ ULTIMATE.start_main_~y~0 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (* 2 ULTIMATE.start_main_~x~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) [2021-08-26 07:52:39,277 INFO L857 garLoopResultBuilder]: For program point L10-3(lines 10 13) no Hoare annotation was computed. [2021-08-26 07:52:39,277 INFO L860 garLoopResultBuilder]: At program point L39(lines 18 40) the Hoare annotation is: true [2021-08-26 07:52:39,277 INFO L860 garLoopResultBuilder]: At program point L10-5(lines 9 15) the Hoare annotation is: true [2021-08-26 07:52:39,280 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 07:52:39,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:52:39 BoogieIcfgContainer [2021-08-26 07:52:39,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 07:52:39,292 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 07:52:39,292 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 07:52:39,293 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 07:52:39,293 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:52:36" (3/4) ... [2021-08-26 07:52:39,295 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 07:52:39,306 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-26 07:52:39,306 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 07:52:39,307 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 07:52:39,307 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 07:52:39,334 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 07:52:39,334 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 07:52:39,335 INFO L168 Benchmark]: Toolchain (without parser) took 2999.16 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 43.9 MB in the beginning and 66.3 MB in the end (delta: -22.4 MB). Peak memory consumption was 37.0 MB. Max. memory is 16.1 GB. [2021-08-26 07:52:39,335 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 46.1 MB. Free memory was 28.3 MB in the beginning and 28.2 MB in the end (delta: 51.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:52:39,336 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.98 ms. Allocated memory is still 58.7 MB. Free memory was 43.6 MB in the beginning and 34.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-26 07:52:39,336 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.87 ms. Allocated memory is still 58.7 MB. Free memory was 34.0 MB in the beginning and 42.7 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 07:52:39,336 INFO L168 Benchmark]: Boogie Preprocessor took 28.45 ms. Allocated memory is still 58.7 MB. Free memory was 42.5 MB in the beginning and 41.6 MB in the end (delta: 875.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:52:39,337 INFO L168 Benchmark]: RCFGBuilder took 256.64 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 29.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 07:52:39,337 INFO L168 Benchmark]: TraceAbstraction took 2454.80 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 29.1 MB in the beginning and 34.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 24.0 MB. Max. memory is 16.1 GB. [2021-08-26 07:52:39,337 INFO L168 Benchmark]: Witness Printer took 41.60 ms. Allocated memory is still 86.0 MB. Free memory was 34.7 MB in the beginning and 66.3 MB in the end (delta: -31.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:52:39,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 46.1 MB. Free memory was 28.3 MB in the beginning and 28.2 MB in the end (delta: 51.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 158.98 ms. Allocated memory is still 58.7 MB. Free memory was 43.6 MB in the beginning and 34.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.87 ms. Allocated memory is still 58.7 MB. Free memory was 34.0 MB in the beginning and 42.7 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.45 ms. Allocated memory is still 58.7 MB. Free memory was 42.5 MB in the beginning and 41.6 MB in the end (delta: 875.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 256.64 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 29.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2454.80 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 29.1 MB in the beginning and 34.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 24.0 MB. Max. memory is 16.1 GB. * Witness Printer took 41.60 ms. Allocated memory is still 86.0 MB. Free memory was 34.7 MB in the beginning and 66.3 MB in the end (delta: -31.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: 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, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2392.6ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 8.7ms, AutomataDifference: 278.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 66.6ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42 SDtfs, 50 SDslu, 90 SDs, 0 SdLazy, 83 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 107.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 148.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 16 NumberOfFragments, 42 HoareAnnotationTreeSize, 4 FomulaSimplifications, 119 FormulaSimplificationTreeSizeReduction, 30.9ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 29.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 34.5ms SsaConstructionTime, 92.8ms SatisfiabilityAnalysisTime, 606.7ms InterpolantComputationTime, 48 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 219 SizeOfPredicates, 14 NumberOfNonLiveVariables, 288 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 20/34 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: 30]: Loop Invariant Derived loop invariant: y + y * y == 2 * x && 1 == cond - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (y + y * y == 2 * x && 1 == cond) || (y == 0 && y + y * y == 2 * x) - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 07:52:39,375 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...