./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound2.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/ps3-ll_unwindbound2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ab746bf4a089e72e80f9c298a9407c6c1a5ad2bd ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:53:13,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 07:53:13,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 07:53:13,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 07:53:13,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 07:53:13,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 07:53:13,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 07:53:13,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 07:53:13,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 07:53:13,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 07:53:13,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 07:53:13,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 07:53:13,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 07:53:13,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 07:53:13,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 07:53:13,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 07:53:13,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 07:53:13,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 07:53:13,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 07:53:13,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 07:53:13,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 07:53:13,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 07:53:13,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 07:53:13,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 07:53:13,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 07:53:13,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 07:53:13,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 07:53:13,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 07:53:13,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 07:53:13,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 07:53:13,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 07:53:13,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 07:53:13,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 07:53:13,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 07:53:13,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 07:53:13,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 07:53:13,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 07:53:13,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 07:53:13,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 07:53:13,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 07:53:13,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 07:53:13,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 07:53:13,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 07:53:13,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 07:53:13,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 07:53:13,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 07:53:13,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 07:53:13,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 07:53:13,241 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 07:53:13,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 07:53:13,241 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 07:53:13,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 07:53:13,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 07:53:13,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 07:53:13,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 07:53:13,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 07:53:13,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 07:53:13,242 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 07:53:13,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 07:53:13,243 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 07:53:13,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 07:53:13,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 07:53:13,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 07:53:13,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 07:53:13,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:53:13,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 07:53:13,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 07:53:13,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 07:53:13,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 07:53:13,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 07:53:13,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 07:53:13,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 07:53:13,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab746bf4a089e72e80f9c298a9407c6c1a5ad2bd [2021-08-26 07:53:13,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 07:53:13,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 07:53:13,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 07:53:13,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 07:53:13,609 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 07:53:13,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound2.c [2021-08-26 07:53:13,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33bd026c1/9bbe6bebeaa541e090358188bea3db1b/FLAG1208ad408 [2021-08-26 07:53:14,058 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 07:53:14,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps3-ll_unwindbound2.c [2021-08-26 07:53:14,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33bd026c1/9bbe6bebeaa541e090358188bea3db1b/FLAG1208ad408 [2021-08-26 07:53:14,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33bd026c1/9bbe6bebeaa541e090358188bea3db1b [2021-08-26 07:53:14,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 07:53:14,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 07:53:14,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 07:53:14,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 07:53:14,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 07:53:14,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fee4d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14, skipping insertion in model container [2021-08-26 07:53:14,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 07:53:14,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 07:53:14,251 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/ps3-ll_unwindbound2.c[458,471] [2021-08-26 07:53:14,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:53:14,280 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 07:53:14,292 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/ps3-ll_unwindbound2.c[458,471] [2021-08-26 07:53:14,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:53:14,344 INFO L208 MainTranslator]: Completed translation [2021-08-26 07:53:14,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14 WrapperNode [2021-08-26 07:53:14,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 07:53:14,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 07:53:14,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 07:53:14,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 07:53:14,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 07:53:14,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 07:53:14,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 07:53:14,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 07:53:14,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 07:53:14,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 07:53:14,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 07:53:14,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 07:53:14,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (1/1) ... [2021-08-26 07:53:14,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:53:14,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:53:14,470 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 07:53:14,502 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 07:53:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 07:53:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 07:53:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 07:53:14,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 07:53:14,774 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 07:53:14,784 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 07:53:14,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:53:14 BoogieIcfgContainer [2021-08-26 07:53:14,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 07:53:14,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 07:53:14,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 07:53:14,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 07:53:14,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:53:14" (1/3) ... [2021-08-26 07:53:14,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1e188b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:53:14, skipping insertion in model container [2021-08-26 07:53:14,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:53:14" (2/3) ... [2021-08-26 07:53:14,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1e188b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:53:14, skipping insertion in model container [2021-08-26 07:53:14,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:53:14" (3/3) ... [2021-08-26 07:53:14,807 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_unwindbound2.c [2021-08-26 07:53:14,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 07:53:14,812 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 07:53:14,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 07:53:14,876 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 07:53:14,876 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 07:53:14,887 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 07:53:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 07:53:14,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:53:14,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 07:53:14,892 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:53:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:53:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-08-26 07:53:14,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:53:14,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724332078] [2021-08-26 07:53:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:53:14,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:53:15,049 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:53:15,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063022723] [2021-08-26 07:53:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:53:15,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:53:15,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:53:15,054 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 07:53:15,055 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 07:53:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:53:15,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 07:53:15,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:53:15,329 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 07:53:15,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:53:15,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724332078] [2021-08-26 07:53:15,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:53:15,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063022723] [2021-08-26 07:53:15,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063022723] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:53:15,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:53:15,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 07:53:15,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172353874] [2021-08-26 07:53:15,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:53:15,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:53:15,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:53:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:53:15,349 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 07:53:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:53:15,590 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-08-26 07:53:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:53:15,592 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 07:53:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:53:15,598 INFO L225 Difference]: With dead ends: 44 [2021-08-26 07:53:15,598 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 07:53:15,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:53:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 07:53:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-08-26 07:53:15,624 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 07:53:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-26 07:53:15,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2021-08-26 07:53:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:53:15,626 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-26 07:53:15,626 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 07:53:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-26 07:53:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 07:53:15,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:53:15,627 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 07:53:15,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 07:53:15,841 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 07:53:15,842 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:53:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:53:15,843 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-08-26 07:53:15,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:53:15,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573326631] [2021-08-26 07:53:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:53:15,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:53:15,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:53:15,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207141339] [2021-08-26 07:53:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:53:15,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:53:15,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:53:15,867 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 07:53:15,868 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 07:53:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:53:15,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 07:53:15,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:53:16,124 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 07:53:16,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:53:16,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573326631] [2021-08-26 07:53:16,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:53:16,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207141339] [2021-08-26 07:53:16,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207141339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:53:16,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:53:16,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:53:16,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740511334] [2021-08-26 07:53:16,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:53:16,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:53:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:53:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:53:16,129 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 07:53:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:53:16,198 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-08-26 07:53:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:53:16,199 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 07:53:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:53:16,199 INFO L225 Difference]: With dead ends: 29 [2021-08-26 07:53:16,199 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 07:53:16,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:53:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 07:53:16,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-08-26 07:53:16,203 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 07:53:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-26 07:53:16,204 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2021-08-26 07:53:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:53:16,205 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-26 07:53:16,205 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 07:53:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-26 07:53:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 07:53:16,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:53:16,206 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-08-26 07:53:16,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-26 07:53:16,419 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 07:53:16,420 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:53:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:53:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2021-08-26 07:53:16,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:53:16,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358827922] [2021-08-26 07:53:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:53:16,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:53:16,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:53:16,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886229762] [2021-08-26 07:53:16,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:53:16,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:53:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:53:16,440 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 07:53:16,442 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 07:53:16,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:53:16,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:53:16,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 07:53:16,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:53:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:53:16,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:53:16,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358827922] [2021-08-26 07:53:16,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:53:16,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886229762] [2021-08-26 07:53:16,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886229762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:53:16,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:53:16,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:53:16,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417947690] [2021-08-26 07:53:16,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:53:16,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:53:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:53:16,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:53:16,664 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), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:53:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:53:16,709 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-08-26 07:53:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:53:16,711 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 07:53:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:53:16,711 INFO L225 Difference]: With dead ends: 26 [2021-08-26 07:53:16,712 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 07:53:16,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:53:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 07:53:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-26 07:53:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0) internal successors, (15), 15 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:53:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2021-08-26 07:53:16,715 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 14 [2021-08-26 07:53:16,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:53:16,716 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2021-08-26 07:53:16,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:53:16,716 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2021-08-26 07:53:16,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 07:53:16,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:53:16,717 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 07:53:16,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 07:53:16,932 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 07:53:16,933 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:53:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:53:16,934 INFO L82 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 1 times [2021-08-26 07:53:16,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:53:16,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349590004] [2021-08-26 07:53:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:53:16,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:53:16,943 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:53:16,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633377984] [2021-08-26 07:53:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:53:16,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:53:16,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:53:16,947 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 07:53:16,983 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 07:53:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:53:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 07:53:17,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:53:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:53:17,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:53:17,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349590004] [2021-08-26 07:53:17,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:53:17,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633377984] [2021-08-26 07:53:17,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633377984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:53:17,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:53:17,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 07:53:17,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725427378] [2021-08-26 07:53:17,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:53:17,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:53:17,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:53:17,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:53:17,433 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:53:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:53:17,489 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2021-08-26 07:53:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 07:53:17,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 07:53:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:53:17,490 INFO L225 Difference]: With dead ends: 16 [2021-08-26 07:53:17,491 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 07:53:17,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-26 07:53:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 07:53:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 07:53:17,494 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 07:53:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 07:53:17,495 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-08-26 07:53:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:53:17,495 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 07:53:17,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:53:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 07:53:17,496 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 07:53:17,498 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:53:17,499 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:53:17,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-26 07:53:17,703 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 07:53:17,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 07:53:17,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:53:17,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:53:17,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:53:17,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 07:53:17,804 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 07:53:17,805 INFO L857 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2021-08-26 07:53:17,805 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-08-26 07:53:17,806 INFO L853 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse1 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (.cse0 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond))) (or (and (<= 2 ~counter~0) .cse0 (= (+ (* 2 .cse1) 1) (+ ULTIMATE.start_main_~x~0 (* 2 ULTIMATE.start_main_~y~0))) (= ULTIMATE.start_main_~y~0 2)) (and (= ULTIMATE.start_main_~x~0 .cse1) .cse0 (= ULTIMATE.start_main_~y~0 1) (<= 1 ~counter~0)) (and (= ULTIMATE.start_main_~y~0 0) (= ULTIMATE.start_main_~x~0 0) (<= 0 ~counter~0)))) [2021-08-26 07:53:17,807 INFO L857 garLoopResultBuilder]: For program point L27-4(lines 27 36) no Hoare annotation was computed. [2021-08-26 07:53:17,809 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-08-26 07:53:17,809 INFO L857 garLoopResultBuilder]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2021-08-26 07:53:17,809 INFO L860 garLoopResultBuilder]: At program point L38(lines 18 39) the Hoare annotation is: true [2021-08-26 07:53:17,809 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 07:53:17,810 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 07:53:17,810 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 07:53:17,811 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-08-26 07:53:17,811 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-08-26 07:53:17,811 INFO L853 garLoopResultBuilder]: At program point L10-2(lines 30 31) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~y~0 0) (= ULTIMATE.start_main_~x~0 0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ~counter~0)) (and (<= 2 ~counter~0) (= ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~y~0 1))) [2021-08-26 07:53:17,816 INFO L857 garLoopResultBuilder]: For program point L10-3(lines 10 13) no Hoare annotation was computed. [2021-08-26 07:53:17,817 INFO L860 garLoopResultBuilder]: At program point L10-5(lines 9 15) the Hoare annotation is: true [2021-08-26 07:53:17,820 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 07:53:17,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:53:17 BoogieIcfgContainer [2021-08-26 07:53:17,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 07:53:17,846 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 07:53:17,846 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 07:53:17,846 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 07:53:17,846 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:53:14" (3/4) ... [2021-08-26 07:53:17,848 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 07:53:17,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-26 07:53:17,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 07:53:17,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 07:53:17,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 07:53:17,879 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 07:53:17,880 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 07:53:17,881 INFO L168 Benchmark]: Toolchain (without parser) took 3801.61 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 38.0 MB in the beginning and 46.1 MB in the end (delta: -8.1 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2021-08-26 07:53:17,882 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 58.7 MB. Free memory was 41.4 MB in the beginning and 41.3 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:53:17,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.38 ms. Allocated memory is still 58.7 MB. Free memory was 37.8 MB in the beginning and 43.3 MB in the end (delta: -5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 07:53:17,882 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.69 ms. Allocated memory is still 58.7 MB. Free memory was 43.1 MB in the beginning and 41.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:53:17,883 INFO L168 Benchmark]: Boogie Preprocessor took 37.68 ms. Allocated memory is still 58.7 MB. Free memory was 41.6 MB in the beginning and 40.6 MB in the end (delta: 985.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:53:17,883 INFO L168 Benchmark]: RCFGBuilder took 346.30 ms. Allocated memory is still 58.7 MB. Free memory was 40.6 MB in the beginning and 28.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 07:53:17,884 INFO L168 Benchmark]: TraceAbstraction took 3057.74 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 28.1 MB in the beginning and 48.2 MB in the end (delta: -20.1 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. [2021-08-26 07:53:17,884 INFO L168 Benchmark]: Witness Printer took 33.79 ms. Allocated memory is still 77.6 MB. Free memory was 48.2 MB in the beginning and 46.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:53:17,887 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 58.7 MB. Free memory was 41.4 MB in the beginning and 41.3 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.38 ms. Allocated memory is still 58.7 MB. Free memory was 37.8 MB in the beginning and 43.3 MB in the end (delta: -5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.69 ms. Allocated memory is still 58.7 MB. Free memory was 43.1 MB in the beginning and 41.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.68 ms. Allocated memory is still 58.7 MB. Free memory was 41.6 MB in the beginning and 40.6 MB in the end (delta: 985.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 346.30 ms. Allocated memory is still 58.7 MB. Free memory was 40.6 MB in the beginning and 28.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3057.74 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 28.1 MB in the beginning and 48.2 MB in the end (delta: -20.1 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. * Witness Printer took 33.79 ms. Allocated memory is still 77.6 MB. Free memory was 48.2 MB in the beginning and 46.1 MB in the end (delta: 2.1 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: 2966.9ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 8.3ms, AutomataDifference: 446.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 100.2ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42 SDtfs, 45 SDslu, 76 SDs, 0 SdLazy, 74 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 272.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 200.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22.6ms AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 13 NumberOfFragments, 80 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 41.4ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 53.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 51.8ms SsaConstructionTime, 125.0ms SatisfiabilityAnalysisTime, 850.2ms InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 228 SizeOfPredicates, 13 NumberOfNonLiveVariables, 305 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 8/21 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 == 0 && x == 0) && 1 <= cond) && 1 <= counter) || (((2 <= counter && x == y * y) && 1 == cond) && y == 1) - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((2 <= counter && 1 <= cond) && 2 * (y * y) + 1 == x + 2 * y) && y == 2) || (((x == y * y && 1 <= cond) && y == 1) && 1 <= counter)) || ((y == 0 && x == 0) && 0 <= counter) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 07:53:17,905 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...