./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound1.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/ps5-ll_unwindbound1.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 7be07080670d55b62a9775acd64fddabe08b2aaa ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 07:58:45,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 07:58:45,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 07:58:45,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 07:58:45,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 07:58:45,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 07:58:45,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 07:58:45,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 07:58:45,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 07:58:45,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 07:58:45,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 07:58:45,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 07:58:45,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 07:58:45,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 07:58:45,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 07:58:45,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 07:58:45,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 07:58:45,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 07:58:45,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 07:58:45,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 07:58:45,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 07:58:45,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 07:58:45,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 07:58:45,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 07:58:45,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 07:58:45,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 07:58:45,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 07:58:45,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 07:58:45,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 07:58:45,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 07:58:45,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 07:58:45,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 07:58:45,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 07:58:45,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 07:58:45,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 07:58:45,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 07:58:45,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 07:58:45,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 07:58:45,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 07:58:45,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 07:58:45,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 07:58:45,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 07:58:45,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 07:58:45,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 07:58:45,414 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 07:58:45,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 07:58:45,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 07:58:45,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 07:58:45,416 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 07:58:45,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 07:58:45,416 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 07:58:45,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 07:58:45,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 07:58:45,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 07:58:45,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 07:58:45,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 07:58:45,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 07:58:45,417 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 07:58:45,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 07:58:45,418 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 07:58:45,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 07:58:45,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 07:58:45,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 07:58:45,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 07:58:45,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:58:45,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 07:58:45,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 07:58:45,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 07:58:45,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 07:58:45,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 07:58:45,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 07:58:45,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 07:58:45,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be07080670d55b62a9775acd64fddabe08b2aaa [2021-08-26 07:58:45,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 07:58:45,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 07:58:45,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 07:58:45,673 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 07:58:45,684 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 07:58:45,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound1.c [2021-08-26 07:58:45,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c589fa48/ed0344ec9b0b4fa3ba86e8793c389174/FLAG798501f67 [2021-08-26 07:58:46,047 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 07:58:46,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound1.c [2021-08-26 07:58:46,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c589fa48/ed0344ec9b0b4fa3ba86e8793c389174/FLAG798501f67 [2021-08-26 07:58:46,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c589fa48/ed0344ec9b0b4fa3ba86e8793c389174 [2021-08-26 07:58:46,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 07:58:46,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 07:58:46,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 07:58:46,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 07:58:46,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 07:58:46,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e19d11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46, skipping insertion in model container [2021-08-26 07:58:46,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 07:58:46,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 07:58:46,600 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/ps5-ll_unwindbound1.c[458,471] [2021-08-26 07:58:46,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:58:46,621 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 07:58:46,662 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/ps5-ll_unwindbound1.c[458,471] [2021-08-26 07:58:46,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:58:46,681 INFO L208 MainTranslator]: Completed translation [2021-08-26 07:58:46,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46 WrapperNode [2021-08-26 07:58:46,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 07:58:46,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 07:58:46,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 07:58:46,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 07:58:46,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 07:58:46,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 07:58:46,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 07:58:46,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 07:58:46,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 07:58:46,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 07:58:46,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 07:58:46,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 07:58:46,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (1/1) ... [2021-08-26 07:58:46,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:58:46,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:58:46,734 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 07:58:46,751 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 07:58:46,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 07:58:46,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 07:58:46,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 07:58:46,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 07:58:46,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 07:58:46,928 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-26 07:58:46,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:58:46 BoogieIcfgContainer [2021-08-26 07:58:46,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 07:58:46,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 07:58:46,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 07:58:46,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 07:58:46,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:58:46" (1/3) ... [2021-08-26 07:58:46,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5205f4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:58:46, skipping insertion in model container [2021-08-26 07:58:46,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:58:46" (2/3) ... [2021-08-26 07:58:46,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5205f4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:58:46, skipping insertion in model container [2021-08-26 07:58:46,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:58:46" (3/3) ... [2021-08-26 07:58:46,934 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound1.c [2021-08-26 07:58:46,937 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 07:58:46,937 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 07:58:46,964 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 07:58:46,968 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 07:58:46,969 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 07:58:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:58:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 07:58:46,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:58:46,979 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:58:46,980 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:58:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:58:46,983 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2021-08-26 07:58:46,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:58:46,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804281223] [2021-08-26 07:58:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:58:46,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:58:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:58:47,092 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 07:58:47,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:58:47,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804281223] [2021-08-26 07:58:47,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804281223] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:58:47,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:58:47,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 07:58:47,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151240375] [2021-08-26 07:58:47,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 07:58:47,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:58:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 07:58:47,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:58:47,122 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:58:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:58:47,132 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-08-26 07:58:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 07:58:47,133 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-26 07:58:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:58:47,138 INFO L225 Difference]: With dead ends: 41 [2021-08-26 07:58:47,138 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 07:58:47,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:58:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 07:58:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-26 07:58:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:58:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-26 07:58:47,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-08-26 07:58:47,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:58:47,158 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-26 07:58:47,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:58:47,159 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-26 07:58:47,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 07:58:47,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:58:47,160 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:58:47,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 07:58:47,161 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:58:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:58:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-08-26 07:58:47,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:58:47,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361417349] [2021-08-26 07:58:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:58:47,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:58:47,186 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:58:47,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399032004] [2021-08-26 07:58:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:58:47,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:58:47,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:58:47,189 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 07:58:47,190 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 07:58:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:58:47,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 07:58:47,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:58:47,420 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 07:58:47,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:58:47,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361417349] [2021-08-26 07:58:47,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:58:47,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399032004] [2021-08-26 07:58:47,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399032004] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:58:47,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:58:47,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 07:58:47,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111971644] [2021-08-26 07:58:47,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:58:47,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:58:47,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:58:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:58:47,429 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:58:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:58:47,517 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-08-26 07:58:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:58:47,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-26 07:58:47,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:58:47,518 INFO L225 Difference]: With dead ends: 36 [2021-08-26 07:58:47,519 INFO L226 Difference]: Without dead ends: 25 [2021-08-26 07:58:47,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:58:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-26 07:58:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-08-26 07:58:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 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 07:58:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-26 07:58:47,524 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2021-08-26 07:58:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:58:47,524 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-26 07:58:47,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:58:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-26 07:58:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 07:58:47,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:58:47,526 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:58:47,569 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 07:58:47,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:58:47,741 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:58:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:58:47,744 INFO L82 PathProgramCache]: Analyzing trace with hash -938089448, now seen corresponding path program 1 times [2021-08-26 07:58:47,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:58:47,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116294468] [2021-08-26 07:58:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:58:47,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:58:47,757 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:58:47,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618089801] [2021-08-26 07:58:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:58:47,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:58:47,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:58:47,777 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 07:58:47,778 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 07:58:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:58:47,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 07:58:47,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:58:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:58:47,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:58:47,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116294468] [2021-08-26 07:58:47,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:58:47,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618089801] [2021-08-26 07:58:47,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618089801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:58:47,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:58:47,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-26 07:58:47,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027890447] [2021-08-26 07:58:47,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:58:47,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:58:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:58:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:58:47,926 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:58:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:58:47,953 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-08-26 07:58:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:58:47,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 07:58:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:58:47,955 INFO L225 Difference]: With dead ends: 32 [2021-08-26 07:58:47,955 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 07:58:47,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:58:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 07:58:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-26 07:58:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.0625) internal successors, (17), 17 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 07:58:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2021-08-26 07:58:47,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 12 [2021-08-26 07:58:47,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:58:47,958 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2021-08-26 07:58:47,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:58:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2021-08-26 07:58:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 07:58:47,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:58:47,958 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:58:47,977 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 07:58:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 07:58:48,175 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:58:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:58:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash 983954548, now seen corresponding path program 1 times [2021-08-26 07:58:48,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:58:48,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201981110] [2021-08-26 07:58:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:58:48,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:58:48,184 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:58:48,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081224137] [2021-08-26 07:58:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:58:48,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:58:48,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:58:48,186 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 07:58:48,201 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 07:58:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:58:48,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 07:58:48,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:58:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:58:48,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:58:48,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201981110] [2021-08-26 07:58:48,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:58:48,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081224137] [2021-08-26 07:58:48,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081224137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:58:48,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:58:48,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:58:48,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502140633] [2021-08-26 07:58:48,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:58:48,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:58:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:58:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:58:48,463 INFO L87 Difference]: Start difference. First operand 18 states and 17 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 07:58:48,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:58:48,506 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2021-08-26 07:58:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:58:48,507 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 13 [2021-08-26 07:58:48,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:58:48,508 INFO L225 Difference]: With dead ends: 18 [2021-08-26 07:58:48,508 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 07:58:48,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:58:48,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 07:58:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-26 07:58:48,510 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 07:58:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2021-08-26 07:58:48,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 13 [2021-08-26 07:58:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:58:48,511 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2021-08-26 07:58:48,511 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 07:58:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2021-08-26 07:58:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 07:58:48,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:58:48,512 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:58:48,533 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 07:58:48,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:58:48,718 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:58:48,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:58:48,718 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2021-08-26 07:58:48,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:58:48,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936703293] [2021-08-26 07:58:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:58:48,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:58:48,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:58:48,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843437614] [2021-08-26 07:58:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:58:48,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:58:48,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:58:48,728 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 07:58:48,761 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 07:58:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 07:58:48,814 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 07:58:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 07:58:48,867 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 07:58:48,878 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 07:58:48,879 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:58:48,881 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:58:48,881 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:58:48,907 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 07:58:49,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:58:49,093 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 07:58:49,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:58:49 BoogieIcfgContainer [2021-08-26 07:58:49,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 07:58:49,110 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 07:58:49,110 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 07:58:49,111 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 07:58:49,111 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:58:46" (3/4) ... [2021-08-26 07:58:49,112 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 07:58:49,137 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 07:58:49,137 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 07:58:49,138 INFO L168 Benchmark]: Toolchain (without parser) took 2630.53 ms. Allocated memory was 52.4 MB in the beginning and 92.3 MB in the end (delta: 39.8 MB). Free memory was 32.0 MB in the beginning and 36.2 MB in the end (delta: -4.1 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. [2021-08-26 07:58:49,138 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 52.4 MB. Free memory was 34.5 MB in the beginning and 34.5 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:58:49,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.36 ms. Allocated memory was 52.4 MB in the beginning and 75.5 MB in the end (delta: 23.1 MB). Free memory was 31.8 MB in the beginning and 59.8 MB in the end (delta: -27.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2021-08-26 07:58:49,139 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.09 ms. Allocated memory is still 75.5 MB. Free memory was 59.8 MB in the beginning and 58.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:58:49,139 INFO L168 Benchmark]: Boogie Preprocessor took 13.75 ms. Allocated memory is still 75.5 MB. Free memory was 58.1 MB in the beginning and 57.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:58:49,139 INFO L168 Benchmark]: RCFGBuilder took 212.65 ms. Allocated memory is still 75.5 MB. Free memory was 57.1 MB in the beginning and 43.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 07:58:49,140 INFO L168 Benchmark]: TraceAbstraction took 2179.98 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 43.1 MB in the beginning and 38.3 MB in the end (delta: 4.9 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. [2021-08-26 07:58:49,140 INFO L168 Benchmark]: Witness Printer took 26.78 ms. Allocated memory is still 92.3 MB. Free memory was 38.3 MB in the beginning and 36.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:58:49,142 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 52.4 MB. Free memory was 34.5 MB in the beginning and 34.5 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 171.36 ms. Allocated memory was 52.4 MB in the beginning and 75.5 MB in the end (delta: 23.1 MB). Free memory was 31.8 MB in the beginning and 59.8 MB in the end (delta: -27.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 19.09 ms. Allocated memory is still 75.5 MB. Free memory was 59.8 MB in the beginning and 58.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.75 ms. Allocated memory is still 75.5 MB. Free memory was 58.1 MB in the beginning and 57.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 212.65 ms. Allocated memory is still 75.5 MB. Free memory was 57.1 MB in the beginning and 43.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2179.98 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 43.1 MB in the beginning and 38.3 MB in the end (delta: 4.9 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. * Witness Printer took 26.78 ms. Allocated memory is still 92.3 MB. Free memory was 38.3 MB in the beginning and 36.2 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 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<1 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND FALSE !(counter++<1) [L10] COND FALSE !(!(cond)) VAL [counter=2] [L10] COND TRUE !(cond) VAL [counter=2] [L12] reach_error() VAL [counter=2] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 2128.3ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 7.0ms, AutomataDifference: 204.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 62 SDtfs, 28 SDslu, 54 SDs, 0 SdLazy, 45 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 85.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 104.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.2ms AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 39.7ms SsaConstructionTime, 104.6ms SatisfiabilityAnalysisTime, 458.2ms InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 125 SizeOfPredicates, 7 NumberOfNonLiveVariables, 214 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 07:58:49,178 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...