./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-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/prodbin-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 c85a6735410218576818c1b29079e4dfeaa314c9 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:47:13,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 07:47:13,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 07:47:13,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 07:47:13,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 07:47:13,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 07:47:13,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 07:47:13,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 07:47:13,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 07:47:13,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 07:47:13,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 07:47:13,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 07:47:13,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 07:47:13,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 07:47:13,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 07:47:13,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 07:47:13,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 07:47:13,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 07:47:13,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 07:47:13,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 07:47:13,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 07:47:13,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 07:47:13,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 07:47:13,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 07:47:13,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 07:47:13,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 07:47:13,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 07:47:13,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 07:47:13,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 07:47:13,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 07:47:13,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 07:47:13,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 07:47:13,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 07:47:13,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 07:47:13,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 07:47:13,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 07:47:13,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 07:47:13,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 07:47:13,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 07:47:13,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 07:47:13,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 07:47:13,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 07:47:13,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 07:47:13,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 07:47:13,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 07:47:13,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 07:47:13,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 07:47:13,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 07:47:13,555 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 07:47:13,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 07:47:13,555 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 07:47:13,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 07:47:13,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 07:47:13,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 07:47:13,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 07:47:13,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 07:47:13,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 07:47:13,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 07:47:13,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 07:47:13,558 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 07:47:13,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 07:47:13,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 07:47:13,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 07:47:13,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 07:47:13,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:47:13,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 07:47:13,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 07:47:13,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 07:47:13,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 07:47:13,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 07:47:13,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 07:47:13,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 07:47:13,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c85a6735410218576818c1b29079e4dfeaa314c9 [2021-08-26 07:47:13,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 07:47:13,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 07:47:13,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 07:47:13,875 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 07:47:13,876 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 07:47:13,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c [2021-08-26 07:47:13,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215ac61bc/8cc8af79ba894ef488bffdac85a4fea3/FLAG6c0b32b51 [2021-08-26 07:47:14,341 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 07:47:14,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound2.c [2021-08-26 07:47:14,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215ac61bc/8cc8af79ba894ef488bffdac85a4fea3/FLAG6c0b32b51 [2021-08-26 07:47:14,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215ac61bc/8cc8af79ba894ef488bffdac85a4fea3 [2021-08-26 07:47:14,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 07:47:14,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 07:47:14,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 07:47:14,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 07:47:14,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 07:47:14,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@554e514e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14, skipping insertion in model container [2021-08-26 07:47:14,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 07:47:14,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 07:47:14,541 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/prodbin-ll_unwindbound2.c[537,550] [2021-08-26 07:47:14,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:47:14,563 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 07:47:14,576 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/prodbin-ll_unwindbound2.c[537,550] [2021-08-26 07:47:14,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 07:47:14,603 INFO L208 MainTranslator]: Completed translation [2021-08-26 07:47:14,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14 WrapperNode [2021-08-26 07:47:14,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 07:47:14,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 07:47:14,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 07:47:14,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 07:47:14,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 07:47:14,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 07:47:14,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 07:47:14,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 07:47:14,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 07:47:14,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 07:47:14,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 07:47:14,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 07:47:14,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (1/1) ... [2021-08-26 07:47:14,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 07:47:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:14,718 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 07:47:14,747 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 07:47:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 07:47:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 07:47:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 07:47:14,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 07:47:15,012 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 07:47:15,012 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-26 07:47:15,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:47:15 BoogieIcfgContainer [2021-08-26 07:47:15,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 07:47:15,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 07:47:15,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 07:47:15,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 07:47:15,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:47:14" (1/3) ... [2021-08-26 07:47:15,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f70edfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:47:15, skipping insertion in model container [2021-08-26 07:47:15,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:47:14" (2/3) ... [2021-08-26 07:47:15,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f70edfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:47:15, skipping insertion in model container [2021-08-26 07:47:15,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:47:15" (3/3) ... [2021-08-26 07:47:15,020 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound2.c [2021-08-26 07:47:15,024 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 07:47:15,024 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 07:47:15,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 07:47:15,074 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 07:47:15,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 07:47:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 07:47:15,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:15,098 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:15,099 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:15,104 INFO L82 PathProgramCache]: Analyzing trace with hash 120336139, now seen corresponding path program 1 times [2021-08-26 07:47:15,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:15,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121681760] [2021-08-26 07:47:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:15,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:47:15,281 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 07:47:15,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:15,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121681760] [2021-08-26 07:47:15,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121681760] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:47:15,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:47:15,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 07:47:15,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187840368] [2021-08-26 07:47:15,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 07:47:15,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 07:47:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 07:47:15,309 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 07:47:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:15,322 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2021-08-26 07:47:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 07:47:15,323 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 07:47:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:15,329 INFO L225 Difference]: With dead ends: 37 [2021-08-26 07:47:15,329 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 07:47:15,332 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 07:47:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 07:47:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-26 07:47:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-26 07:47:15,357 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-08-26 07:47:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:15,357 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-26 07:47:15,358 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 07:47:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-08-26 07:47:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 07:47:15,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:15,359 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:15,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 07:47:15,360 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:15,364 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-08-26 07:47:15,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:15,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984114942] [2021-08-26 07:47:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:15,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:15,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:15,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928149382] [2021-08-26 07:47:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:15,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:15,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:15,401 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 07:47:15,417 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 07:47:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:47:15,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 07:47:15,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:15,618 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 07:47:15,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:15,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984114942] [2021-08-26 07:47:15,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:15,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928149382] [2021-08-26 07:47:15,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928149382] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:47:15,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:47:15,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 07:47:15,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246645268] [2021-08-26 07:47:15,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:47:15,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:15,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:47:15,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:47:15,631 INFO L87 Difference]: Start difference. First operand 16 states and 18 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 07:47:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:15,689 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-08-26 07:47:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:47:15,690 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 07:47:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:15,691 INFO L225 Difference]: With dead ends: 33 [2021-08-26 07:47:15,691 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 07:47:15,693 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 07:47:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 07:47:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2021-08-26 07:47:15,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:15,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-08-26 07:47:15,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-08-26 07:47:15,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:15,703 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-08-26 07:47:15,703 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 07:47:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-08-26 07:47:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 07:47:15,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:15,704 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:15,732 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 07:47:15,919 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 07:47:15,920 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1182841223, now seen corresponding path program 1 times [2021-08-26 07:47:15,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:15,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494115104] [2021-08-26 07:47:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:15,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:15,931 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:15,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206073303] [2021-08-26 07:47:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:15,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:15,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:15,937 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 07:47:15,947 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 07:47:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:47:15,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 07:47:15,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:16,031 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 07:47:16,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:16,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494115104] [2021-08-26 07:47:16,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:16,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206073303] [2021-08-26 07:47:16,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206073303] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:47:16,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:47:16,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 07:47:16,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506434940] [2021-08-26 07:47:16,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 07:47:16,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 07:47:16,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:47:16,034 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 07:47:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:16,044 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-08-26 07:47:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 07:47:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-08-26 07:47:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:16,046 INFO L225 Difference]: With dead ends: 23 [2021-08-26 07:47:16,046 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 07:47:16,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 07:47:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 07:47:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-26 07:47:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 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 07:47:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-26 07:47:16,049 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-08-26 07:47:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:16,049 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-26 07:47:16,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 07:47:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-26 07:47:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 07:47:16,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:16,050 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:16,076 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 07:47:16,272 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 07:47:16,273 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1415763136, now seen corresponding path program 1 times [2021-08-26 07:47:16,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:16,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806410019] [2021-08-26 07:47:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:16,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:16,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:16,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128202995] [2021-08-26 07:47:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:16,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:16,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:16,296 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 07:47:16,298 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 07:47:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:47:16,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 07:47:16,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:16,420 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 07:47:16,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:16,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806410019] [2021-08-26 07:47:16,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:16,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128202995] [2021-08-26 07:47:16,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128202995] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:47:16,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:47:16,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 07:47:16,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828028567] [2021-08-26 07:47:16,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:47:16,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:16,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:47:16,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:47:16,426 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:16,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:16,492 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-08-26 07:47:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 07:47:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 07:47:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:16,494 INFO L225 Difference]: With dead ends: 26 [2021-08-26 07:47:16,494 INFO L226 Difference]: Without dead ends: 22 [2021-08-26 07:47:16,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:47:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-26 07:47:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-08-26 07:47:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-26 07:47:16,497 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-08-26 07:47:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:16,498 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-26 07:47:16,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-26 07:47:16,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 07:47:16,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:16,499 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:16,527 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 07:47:16,720 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 07:47:16,721 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:16,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1117718140, now seen corresponding path program 1 times [2021-08-26 07:47:16,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:16,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482400996] [2021-08-26 07:47:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:16,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:16,732 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:16,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453173359] [2021-08-26 07:47:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:16,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:16,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:16,738 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 07:47:16,764 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 07:47:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:47:16,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 07:47:16,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:19,519 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 07:47:19,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:19,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482400996] [2021-08-26 07:47:19,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:19,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453173359] [2021-08-26 07:47:19,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453173359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:47:19,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:47:19,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 07:47:19,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938472214] [2021-08-26 07:47:19,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 07:47:19,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 07:47:19,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:47:19,523 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 07:47:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:20,543 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-08-26 07:47:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 07:47:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 07:47:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:20,547 INFO L225 Difference]: With dead ends: 39 [2021-08-26 07:47:20,547 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 07:47:20,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-26 07:47:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 07:47:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2021-08-26 07:47:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-08-26 07:47:20,551 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2021-08-26 07:47:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:20,552 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-08-26 07:47:20,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 07:47:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-08-26 07:47:20,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 07:47:20,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:20,557 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:20,577 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 07:47:20,769 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 07:47:20,769 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:20,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1174976442, now seen corresponding path program 1 times [2021-08-26 07:47:20,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:20,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089952324] [2021-08-26 07:47:20,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:20,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:20,781 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:20,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416003010] [2021-08-26 07:47:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:20,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:20,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:20,783 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:47:20,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 07:47:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:47:20,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 07:47:20,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:22,958 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 07:47:22,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:22,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089952324] [2021-08-26 07:47:22,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:22,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416003010] [2021-08-26 07:47:22,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416003010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:47:22,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:47:22,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 07:47:22,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686766139] [2021-08-26 07:47:22,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 07:47:22,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 07:47:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-26 07:47:22,966 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 07:47:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:23,292 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-08-26 07:47:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 07:47:23,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 07:47:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:23,294 INFO L225 Difference]: With dead ends: 46 [2021-08-26 07:47:23,294 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 07:47:23,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-26 07:47:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 07:47:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-08-26 07:47:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 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 07:47:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-08-26 07:47:23,311 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2021-08-26 07:47:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:23,312 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-08-26 07:47:23,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 07:47:23,312 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-08-26 07:47:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 07:47:23,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:23,313 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:23,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 07:47:23,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:23,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:23,537 INFO L82 PathProgramCache]: Analyzing trace with hash 289487287, now seen corresponding path program 1 times [2021-08-26 07:47:23,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:23,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092232154] [2021-08-26 07:47:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:23,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:23,547 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:23,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384028206] [2021-08-26 07:47:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:23,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:23,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:23,549 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:47:23,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 07:47:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:47:23,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 07:47:23,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:23,704 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 07:47:23,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:23,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092232154] [2021-08-26 07:47:23,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:23,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384028206] [2021-08-26 07:47:23,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384028206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:47:23,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:47:23,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-26 07:47:23,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125494198] [2021-08-26 07:47:23,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 07:47:23,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:23,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 07:47:23,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 07:47:23,707 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:23,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:23,731 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-08-26 07:47:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:47:23,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 07:47:23,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:23,732 INFO L225 Difference]: With dead ends: 34 [2021-08-26 07:47:23,732 INFO L226 Difference]: Without dead ends: 30 [2021-08-26 07:47:23,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:47:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-26 07:47:23,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-26 07:47:23,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 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 07:47:23,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-08-26 07:47:23,736 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2021-08-26 07:47:23,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:23,737 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-08-26 07:47:23,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:23,737 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-08-26 07:47:23,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 07:47:23,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:23,738 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:23,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-26 07:47:23,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:23,953 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash -935436432, now seen corresponding path program 1 times [2021-08-26 07:47:23,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:23,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235897354] [2021-08-26 07:47:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:23,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:23,961 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:23,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945812322] [2021-08-26 07:47:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:23,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:23,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:23,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:47:23,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 07:47:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 07:47:24,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 07:47:24,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 07:47:24,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:24,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235897354] [2021-08-26 07:47:24,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:24,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945812322] [2021-08-26 07:47:24,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945812322] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 07:47:24,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 07:47:24,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 07:47:24,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274492082] [2021-08-26 07:47:24,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:47:24,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:24,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:47:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:47:24,374 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:26,699 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-08-26 07:47:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:47:26,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 07:47:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:26,700 INFO L225 Difference]: With dead ends: 35 [2021-08-26 07:47:26,701 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 07:47:26,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-26 07:47:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 07:47:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-08-26 07:47:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 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 07:47:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-08-26 07:47:26,704 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2021-08-26 07:47:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:26,705 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-08-26 07:47:26,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 07:47:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-08-26 07:47:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 07:47:26,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:26,706 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:26,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 07:47:26,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:26,913 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:26,914 INFO L82 PathProgramCache]: Analyzing trace with hash -300473268, now seen corresponding path program 2 times [2021-08-26 07:47:26,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:26,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609811773] [2021-08-26 07:47:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:26,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:26,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:26,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147816558] [2021-08-26 07:47:26,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:47:26,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:26,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:26,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:47:26,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 07:47:27,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:47:27,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 07:47:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 07:47:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 07:47:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 07:47:27,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 07:47:27,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609811773] [2021-08-26 07:47:27,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 07:47:27,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147816558] [2021-08-26 07:47:27,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147816558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 07:47:27,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 07:47:27,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 07:47:27,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908723217] [2021-08-26 07:47:27,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 07:47:27,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 07:47:27,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 07:47:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 07:47:27,154 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 07:47:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 07:47:27,176 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-08-26 07:47:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 07:47:27,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-26 07:47:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 07:47:27,178 INFO L225 Difference]: With dead ends: 34 [2021-08-26 07:47:27,178 INFO L226 Difference]: Without dead ends: 22 [2021-08-26 07:47:27,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-26 07:47:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-26 07:47:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-26 07:47:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) 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 07:47:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-26 07:47:27,181 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2021-08-26 07:47:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 07:47:27,181 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-26 07:47:27,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 07:47:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-26 07:47:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 07:47:27,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 07:47:27,182 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 07:47:27,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-26 07:47:27,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-26 07:47:27,389 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 07:47:27,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 07:47:27,390 INFO L82 PathProgramCache]: Analyzing trace with hash -724773401, now seen corresponding path program 2 times [2021-08-26 07:47:27,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 07:47:27,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087501896] [2021-08-26 07:47:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 07:47:27,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 07:47:27,404 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 07:47:27,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65237328] [2021-08-26 07:47:27,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 07:47:27,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 07:47:27,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 07:47:27,406 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 07:47:27,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 07:47:27,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 07:47:27,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-26 07:47:27,548 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 07:47:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 07:47:27,579 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 07:47:27,580 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 07:47:27,580 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:47:27,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 07:47:27,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 07:47:27,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 07:47:27,802 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 07:47:27,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:47:27 BoogieIcfgContainer [2021-08-26 07:47:27,826 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 07:47:27,826 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 07:47:27,826 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 07:47:27,826 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 07:47:27,827 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:47:15" (3/4) ... [2021-08-26 07:47:27,828 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 07:47:27,875 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 07:47:27,879 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 07:47:27,880 INFO L168 Benchmark]: Toolchain (without parser) took 13508.98 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 43.1 MB in the beginning and 53.2 MB in the end (delta: -10.1 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. [2021-08-26 07:47:27,881 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 62.9 MB. Free memory was 43.8 MB in the beginning and 43.7 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:47:27,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.24 ms. Allocated memory is still 62.9 MB. Free memory was 42.9 MB in the beginning and 33.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 07:47:27,882 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.46 ms. Allocated memory is still 62.9 MB. Free memory was 33.1 MB in the beginning and 45.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 07:47:27,882 INFO L168 Benchmark]: Boogie Preprocessor took 21.21 ms. Allocated memory is still 62.9 MB. Free memory was 45.7 MB in the beginning and 44.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 07:47:27,882 INFO L168 Benchmark]: RCFGBuilder took 342.46 ms. Allocated memory is still 62.9 MB. Free memory was 44.4 MB in the beginning and 31.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 07:47:27,883 INFO L168 Benchmark]: TraceAbstraction took 12810.87 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 30.9 MB in the beginning and 55.5 MB in the end (delta: -24.6 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2021-08-26 07:47:27,883 INFO L168 Benchmark]: Witness Printer took 52.83 ms. Allocated memory is still 94.4 MB. Free memory was 55.5 MB in the beginning and 53.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 07:47:27,884 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 62.9 MB. Free memory was 43.8 MB in the beginning and 43.7 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 231.24 ms. Allocated memory is still 62.9 MB. Free memory was 42.9 MB in the beginning and 33.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.46 ms. Allocated memory is still 62.9 MB. Free memory was 33.1 MB in the beginning and 45.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.21 ms. Allocated memory is still 62.9 MB. Free memory was 45.7 MB in the beginning and 44.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 342.46 ms. Allocated memory is still 62.9 MB. Free memory was 44.4 MB in the beginning and 31.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12810.87 ms. Allocated memory was 62.9 MB in the beginning and 94.4 MB in the end (delta: 31.5 MB). Free memory was 30.9 MB in the beginning and 55.5 MB in the end (delta: -24.6 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. * Witness Printer took 52.83 ms. Allocated memory is still 94.4 MB. Free memory was 55.5 MB in the beginning and 53.2 MB in the end (delta: 2.3 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L10] COND FALSE !(!cond) VAL [counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<2 [L13] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(y != 0)) VAL [counter=1] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [counter=1] [L42] x = 2 * x [L43] y = y / 2 VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND TRUE counter++<2 [L13] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(y != 0)) VAL [counter=2] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [counter=2] [L42] x = 2 * x [L43] y = y / 2 VAL [counter=2] [L33] EXPR counter++ VAL [counter=3] [L33] COND FALSE !(counter++<2) [L13] COND TRUE !(cond) VAL [counter=3] [L15] reach_error() VAL [counter=3] - UnprovableResult [Line: 15]: 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, 20 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 12732.0ms, OverallIterations: 10, TraceHistogramMax: 3, EmptinessCheckTime: 19.8ms, AutomataDifference: 3929.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 136 SDtfs, 178 SDslu, 248 SDs, 0 SdLazy, 286 SolverSat, 32 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3333.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 711.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 56.4ms AutomataMinimizationTime, 9 MinimizatonAttempts, 42 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 73.9ms SsaConstructionTime, 194.4ms SatisfiabilityAnalysisTime, 5564.9ms InterpolantComputationTime, 137 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 107 ConstructedInterpolants, 1 QuantifiedInterpolants, 544 SizeOfPredicates, 36 NumberOfNonLiveVariables, 647 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 14/24 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 07:47:27,903 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...