./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.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 16c3a7f72afea5c31f48392b3db26aa208b15a5c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 14:31:46,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 14:31:46,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 14:31:46,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 14:31:46,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 14:31:46,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 14:31:46,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 14:31:46,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 14:31:46,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 14:31:46,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 14:31:46,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 14:31:46,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 14:31:46,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 14:31:46,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 14:31:46,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 14:31:46,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 14:31:46,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 14:31:46,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 14:31:46,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 14:31:46,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 14:31:46,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 14:31:46,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 14:31:46,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 14:31:46,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 14:31:46,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 14:31:46,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 14:31:46,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 14:31:46,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 14:31:46,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 14:31:46,768 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 14:31:46,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 14:31:46,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 14:31:46,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 14:31:46,770 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 14:31:46,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 14:31:46,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 14:31:46,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 14:31:46,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 14:31:46,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 14:31:46,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 14:31:46,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 14:31:46,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 14:31:46,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 14:31:46,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 14:31:46,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 14:31:46,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 14:31:46,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 14:31:46,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 14:31:46,800 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 14:31:46,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 14:31:46,800 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 14:31:46,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 14:31:46,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 14:31:46,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 14:31:46,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 14:31:46,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 14:31:46,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 14:31:46,802 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 14:31:46,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 14:31:46,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 14:31:46,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 14:31:46,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 14:31:46,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 14:31:46,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 14:31:46,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:31:46,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 14:31:46,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 14:31:46,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 14:31:46,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 14:31:46,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 14:31:46,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 14:31:46,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 14:31:46,805 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16c3a7f72afea5c31f48392b3db26aa208b15a5c [2021-08-29 14:31:47,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 14:31:47,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 14:31:47,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 14:31:47,147 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 14:31:47,147 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 14:31:47,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c [2021-08-29 14:31:47,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9a60e96/99ab896326e840ee8838440dc2a588c4/FLAGca1180baa [2021-08-29 14:31:47,651 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 14:31:47,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c [2021-08-29 14:31:47,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9a60e96/99ab896326e840ee8838440dc2a588c4/FLAGca1180baa [2021-08-29 14:31:48,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f9a60e96/99ab896326e840ee8838440dc2a588c4 [2021-08-29 14:31:48,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 14:31:48,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 14:31:48,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 14:31:48,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 14:31:48,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 14:31:48,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137f715b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48, skipping insertion in model container [2021-08-29 14:31:48,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 14:31:48,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 14:31:48,217 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/prod4br-ll_valuebound10.c[524,537] [2021-08-29 14:31:48,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:31:48,242 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 14:31:48,252 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/prod4br-ll_valuebound10.c[524,537] [2021-08-29 14:31:48,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 14:31:48,279 INFO L208 MainTranslator]: Completed translation [2021-08-29 14:31:48,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48 WrapperNode [2021-08-29 14:31:48,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 14:31:48,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 14:31:48,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 14:31:48,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 14:31:48,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 14:31:48,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 14:31:48,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 14:31:48,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 14:31:48,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 14:31:48,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 14:31:48,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 14:31:48,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 14:31:48,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (1/1) ... [2021-08-29 14:31:48,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 14:31:48,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:48,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 14:31:48,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 14:31:48,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 14:31:48,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 14:31:48,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 14:31:48,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 14:31:48,557 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 14:31:48,559 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-29 14:31:48,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:31:48 BoogieIcfgContainer [2021-08-29 14:31:48,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 14:31:48,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 14:31:48,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 14:31:48,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 14:31:48,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 02:31:48" (1/3) ... [2021-08-29 14:31:48,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc11082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:31:48, skipping insertion in model container [2021-08-29 14:31:48,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:31:48" (2/3) ... [2021-08-29 14:31:48,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc11082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:31:48, skipping insertion in model container [2021-08-29 14:31:48,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:31:48" (3/3) ... [2021-08-29 14:31:48,571 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound10.c [2021-08-29 14:31:48,579 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 14:31:48,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-29 14:31:48,631 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 14:31:48,648 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 14:31:48,648 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-29 14:31:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 14:31:48,673 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:48,673 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:48,674 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:48,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:48,679 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2021-08-29 14:31:48,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:48,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424311450] [2021-08-29 14:31:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:48,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:48,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:48,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424311450] [2021-08-29 14:31:48,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424311450] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:31:48,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:31:48,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 14:31:48,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754621426] [2021-08-29 14:31:48,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 14:31:48,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 14:31:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:31:48,888 INFO L87 Difference]: Start difference. First operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:48,994 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-08-29 14:31:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 14:31:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 14:31:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:49,018 INFO L225 Difference]: With dead ends: 53 [2021-08-29 14:31:49,018 INFO L226 Difference]: Without dead ends: 24 [2021-08-29 14:31:49,020 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 14:31:49,023 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.33ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.79ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:49,037 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.33ms Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 90.79ms Time] [2021-08-29 14:31:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-29 14:31:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-29 14:31:49,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 23 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) [2021-08-29 14:31:49,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-29 14:31:49,089 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2021-08-29 14:31:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:49,089 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-29 14:31:49,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-29 14:31:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 14:31:49,090 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:49,090 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:49,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 14:31:49,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:49,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2021-08-29 14:31:49,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:49,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461609427] [2021-08-29 14:31:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:49,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:49,116 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:49,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905224560] [2021-08-29 14:31:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:49,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:49,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:49,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:31:49,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 14:31:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-29 14:31:49,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:49,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:31:49,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:49,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461609427] [2021-08-29 14:31:49,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:49,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905224560] [2021-08-29 14:31:49,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905224560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:31:49,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:31:49,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 14:31:49,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800992196] [2021-08-29 14:31:49,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 14:31:49,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:49,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 14:31:49,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 14:31:49,393 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:49,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:49,513 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-08-29 14:31:49,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 14:31:49,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 14:31:49,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:49,516 INFO L225 Difference]: With dead ends: 41 [2021-08-29 14:31:49,516 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 14:31:49,518 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.69ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 14:31:49,519 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.42ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:49,519 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 93.42ms Time] [2021-08-29 14:31:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 14:31:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-08-29 14:31:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-08-29 14:31:49,531 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2021-08-29 14:31:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:49,531 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-08-29 14:31:49,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:31:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-08-29 14:31:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 14:31:49,535 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:49,536 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:49,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 14:31:49,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:49,757 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:49,758 INFO L82 PathProgramCache]: Analyzing trace with hash -937517175, now seen corresponding path program 1 times [2021-08-29 14:31:49,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:49,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803559808] [2021-08-29 14:31:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:49,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:49,767 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:49,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009670266] [2021-08-29 14:31:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:49,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:49,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:49,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:31:49,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 14:31:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:49,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-29 14:31:49,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:50,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:31:50,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:31:50,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803559808] [2021-08-29 14:31:50,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:31:50,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009670266] [2021-08-29 14:31:50,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009670266] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:31:50,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:31:50,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-29 14:31:50,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138889571] [2021-08-29 14:31:50,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 14:31:50,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:31:50,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 14:31:50,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-29 14:31:50,513 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 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) [2021-08-29 14:31:53,059 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:31:55,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:31:56,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:31:56,307 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-08-29 14:31:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 14:31:56,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 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 [2021-08-29 14:31:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:31:56,308 INFO L225 Difference]: With dead ends: 42 [2021-08-29 14:31:56,308 INFO L226 Difference]: Without dead ends: 40 [2021-08-29 14:31:56,309 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 724.39ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-08-29 14:31:56,310 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5257.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.80ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 5316.44ms IncrementalHoareTripleChecker+Time [2021-08-29 14:31:56,310 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 3.80ms Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 2 Unknown, 11 Unchecked, 5316.44ms Time] [2021-08-29 14:31:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-29 14:31:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2021-08-29 14:31:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 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) [2021-08-29 14:31:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-08-29 14:31:56,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 14 [2021-08-29 14:31:56,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:31:56,316 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-08-29 14:31:56,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 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) [2021-08-29 14:31:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-08-29 14:31:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 14:31:56,317 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:31:56,317 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:31:56,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-29 14:31:56,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-29 14:31:56,533 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:31:56,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:31:56,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1003041614, now seen corresponding path program 1 times [2021-08-29 14:31:56,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:31:56,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633690905] [2021-08-29 14:31:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:56,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:31:56,546 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:31:56,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062164642] [2021-08-29 14:31:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:31:56,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:31:56,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:31:56,548 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:31:56,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 14:31:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:31:56,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-29 14:31:56,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:31:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:31:58,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:32:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:32:12,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:32:12,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633690905] [2021-08-29 14:32:12,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:32:12,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062164642] [2021-08-29 14:32:12,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062164642] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 14:32:12,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 14:32:12,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-29 14:32:12,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698082657] [2021-08-29 14:32:12,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-29 14:32:12,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:32:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-29 14:32:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-29 14:32:12,908 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2021-08-29 14:32:37,830 WARN L210 SmtUtils]: Spent 23.73s on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-08-29 14:33:05,674 WARN L210 SmtUtils]: Spent 27.62s on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-08-29 14:33:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:06,253 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-08-29 14:33:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-29 14:33:06,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) Word has length 15 [2021-08-29 14:33:06,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:06,255 INFO L225 Difference]: With dead ends: 56 [2021-08-29 14:33:06,255 INFO L226 Difference]: Without dead ends: 54 [2021-08-29 14:33:06,256 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 57350.18ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-08-29 14:33:06,256 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 241 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 903.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.62ms SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 932.18ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:06,257 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 0 Invalid, 291 Unknown, 0 Unchecked, 2.62ms Time], IncrementalHoareTripleChecker [144 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 932.18ms Time] [2021-08-29 14:33:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-29 14:33:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 27. [2021-08-29 14:33:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-08-29 14:33:06,262 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2021-08-29 14:33:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:06,262 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-08-29 14:33:06,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2021-08-29 14:33:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-08-29 14:33:06,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 14:33:06,263 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:06,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:06,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 14:33:06,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:06,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash 989284300, now seen corresponding path program 1 times [2021-08-29 14:33:06,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:06,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627689990] [2021-08-29 14:33:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:06,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:06,480 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:06,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896445541] [2021-08-29 14:33:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:06,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:06,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:06,482 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:33:06,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 14:33:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:06,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 14:33:06,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:06,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:33:06,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:06,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627689990] [2021-08-29 14:33:06,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:06,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896445541] [2021-08-29 14:33:06,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896445541] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:06,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:06,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-29 14:33:06,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509749936] [2021-08-29 14:33:06,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 14:33:06,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 14:33:06,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-29 14:33:06,604 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:06,716 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-08-29 14:33:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 14:33:06,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 14:33:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:06,717 INFO L225 Difference]: With dead ends: 41 [2021-08-29 14:33:06,717 INFO L226 Difference]: Without dead ends: 35 [2021-08-29 14:33:06,718 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.23ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-29 14:33:06,719 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.49ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:06,719 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 58.49ms Time] [2021-08-29 14:33:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-29 14:33:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-08-29 14:33:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-08-29 14:33:06,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 16 [2021-08-29 14:33:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:06,725 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-08-29 14:33:06,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-08-29 14:33:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 14:33:06,725 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:06,726 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:06,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 14:33:06,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:06,927 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:06,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1530166964, now seen corresponding path program 1 times [2021-08-29 14:33:06,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:06,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940305221] [2021-08-29 14:33:06,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:06,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:06,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:06,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691663948] [2021-08-29 14:33:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:06,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:06,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:06,940 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:33:06,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 14:33:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:06,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-29 14:33:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:07,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:33:07,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:07,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940305221] [2021-08-29 14:33:07,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:07,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691663948] [2021-08-29 14:33:07,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691663948] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:07,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:07,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 14:33:07,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584313958] [2021-08-29 14:33:07,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 14:33:07,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:07,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 14:33:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-29 14:33:07,119 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-08-29 14:33:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:07,214 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-08-29 14:33:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 14:33:07,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) Word has length 18 [2021-08-29 14:33:07,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:07,215 INFO L225 Difference]: With dead ends: 48 [2021-08-29 14:33:07,215 INFO L226 Difference]: Without dead ends: 38 [2021-08-29 14:33:07,216 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.29ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-29 14:33:07,217 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.45ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.55ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:07,217 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.45ms Time], IncrementalHoareTripleChecker [8 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 58.55ms Time] [2021-08-29 14:33:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-29 14:33:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-08-29 14:33:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-08-29 14:33:07,224 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 18 [2021-08-29 14:33:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:07,224 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-08-29 14:33:07,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-08-29 14:33:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-08-29 14:33:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 14:33:07,225 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:07,225 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:07,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 14:33:07,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:07,441 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1915371903, now seen corresponding path program 1 times [2021-08-29 14:33:07,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:07,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663928392] [2021-08-29 14:33:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:07,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:07,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:07,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480841323] [2021-08-29 14:33:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:07,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:07,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:33:07,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 14:33:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 14:33:07,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:07,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:33:07,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:07,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663928392] [2021-08-29 14:33:07,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:07,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480841323] [2021-08-29 14:33:07,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480841323] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:07,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:07,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-29 14:33:07,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978708382] [2021-08-29 14:33:07,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 14:33:07,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:07,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 14:33:07,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-29 14:33:07,653 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:10,000 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:33:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:10,260 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-08-29 14:33:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 14:33:10,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-29 14:33:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:10,261 INFO L225 Difference]: With dead ends: 54 [2021-08-29 14:33:10,261 INFO L226 Difference]: Without dead ends: 50 [2021-08-29 14:33:10,261 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.42ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-29 14:33:10,262 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2549.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 2572.93ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:10,262 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 157 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 1 Unknown, 17 Unchecked, 2572.93ms Time] [2021-08-29 14:33:10,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-29 14:33:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-08-29 14:33:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-08-29 14:33:10,270 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 19 [2021-08-29 14:33:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:10,270 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-08-29 14:33:10,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-08-29 14:33:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 14:33:10,271 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:10,271 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:10,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 14:33:10,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:10,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:10,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1210343271, now seen corresponding path program 1 times [2021-08-29 14:33:10,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:10,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41356990] [2021-08-29 14:33:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:10,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:10,499 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:10,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562819638] [2021-08-29 14:33:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:10,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:10,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:10,501 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:33:10,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 14:33:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:10,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 14:33:10,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:10,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:33:10,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:10,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41356990] [2021-08-29 14:33:10,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:10,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562819638] [2021-08-29 14:33:10,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562819638] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:10,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:10,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-29 14:33:10,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147961120] [2021-08-29 14:33:10,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 14:33:10,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:10,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 14:33:10,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-29 14:33:10,742 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-08-29 14:33:12,775 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-08-29 14:33:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:12,971 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-08-29 14:33:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 14:33:12,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 [2021-08-29 14:33:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:12,973 INFO L225 Difference]: With dead ends: 54 [2021-08-29 14:33:12,973 INFO L226 Difference]: Without dead ends: 52 [2021-08-29 14:33:12,973 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 149.83ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-29 14:33:12,973 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2122.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.45ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 2136.10ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:12,974 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 0 Invalid, 158 Unknown, 0 Unchecked, 0.45ms Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 1 Unknown, 57 Unchecked, 2136.10ms Time] [2021-08-29 14:33:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-29 14:33:12,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2021-08-29 14:33:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-08-29 14:33:12,988 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2021-08-29 14:33:12,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:12,989 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-08-29 14:33:12,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-08-29 14:33:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-08-29 14:33:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 14:33:12,990 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:12,990 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:13,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 14:33:13,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:13,204 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:13,205 INFO L82 PathProgramCache]: Analyzing trace with hash 564664091, now seen corresponding path program 1 times [2021-08-29 14:33:13,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:13,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437195913] [2021-08-29 14:33:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:13,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:13,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:13,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834621853] [2021-08-29 14:33:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:13,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:13,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:13,244 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) [2021-08-29 14:33:13,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 14:33:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-29 14:33:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:14,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 14:33:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 14:33:14,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:14,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437195913] [2021-08-29 14:33:14,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:14,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834621853] [2021-08-29 14:33:14,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834621853] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 14:33:14,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 14:33:14,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 16 [2021-08-29 14:33:14,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68983603] [2021-08-29 14:33:14,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 14:33:14,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 14:33:14,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-29 14:33:14,262 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-08-29 14:33:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:14,422 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-08-29 14:33:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 14:33:14,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 [2021-08-29 14:33:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:14,423 INFO L225 Difference]: With dead ends: 37 [2021-08-29 14:33:14,423 INFO L226 Difference]: Without dead ends: 35 [2021-08-29 14:33:14,423 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 374.16ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-29 14:33:14,424 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.35ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.34ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:14,424 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.35ms Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 148.34ms Time] [2021-08-29 14:33:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-29 14:33:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-08-29 14:33:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2021-08-29 14:33:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-08-29 14:33:14,430 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2021-08-29 14:33:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:14,430 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-08-29 14:33:14,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-08-29 14:33:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-08-29 14:33:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 14:33:14,431 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:14,431 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:14,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 14:33:14,644 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 [2021-08-29 14:33:14,645 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash 796411100, now seen corresponding path program 1 times [2021-08-29 14:33:14,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:14,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009931258] [2021-08-29 14:33:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:14,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:14,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:14,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672258563] [2021-08-29 14:33:14,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:14,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:14,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:14,661 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) [2021-08-29 14:33:14,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 14:33:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:14,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 14:33:14,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 14:33:14,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:33:14,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:14,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009931258] [2021-08-29 14:33:14,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:14,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672258563] [2021-08-29 14:33:14,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672258563] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:14,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:14,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-29 14:33:14,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131639410] [2021-08-29 14:33:14,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 14:33:14,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 14:33:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-29 14:33:14,861 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:14,977 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-08-29 14:33:14,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 14:33:14,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-29 14:33:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:14,978 INFO L225 Difference]: With dead ends: 40 [2021-08-29 14:33:14,978 INFO L226 Difference]: Without dead ends: 34 [2021-08-29 14:33:14,978 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 82.57ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-29 14:33:14,978 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.72ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:14,979 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 60.72ms Time] [2021-08-29 14:33:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-29 14:33:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-08-29 14:33:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2021-08-29 14:33:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-08-29 14:33:14,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2021-08-29 14:33:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:14,983 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-08-29 14:33:14,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-08-29 14:33:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 14:33:14,983 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 14:33:14,983 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 14:33:15,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-29 14:33:15,184 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 [2021-08-29 14:33:15,184 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 14:33:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 14:33:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1476469470, now seen corresponding path program 1 times [2021-08-29 14:33:15,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 14:33:15,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766619060] [2021-08-29 14:33:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:15,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 14:33:15,192 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 14:33:15,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801674165] [2021-08-29 14:33:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 14:33:15,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 14:33:15,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 14:33:15,193 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 14:33:15,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-29 14:33:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 14:33:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-29 14:33:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 14:33:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-29 14:33:15,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 14:33:15,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 14:33:15,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766619060] [2021-08-29 14:33:15,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 14:33:15,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801674165] [2021-08-29 14:33:15,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801674165] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 14:33:15,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 14:33:15,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-29 14:33:15,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026372555] [2021-08-29 14:33:15,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 14:33:15,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 14:33:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 14:33:15,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-29 14:33:15,419 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-08-29 14:33:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 14:33:15,538 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-08-29 14:33:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 14:33:15,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 22 [2021-08-29 14:33:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 14:33:15,539 INFO L225 Difference]: With dead ends: 31 [2021-08-29 14:33:15,539 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 14:33:15,539 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 81.77ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-29 14:33:15,540 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.46ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.27ms IncrementalHoareTripleChecker+Time [2021-08-29 14:33:15,540 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 0.46ms Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 62.27ms Time] [2021-08-29 14:33:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 14:33:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 14:33:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 14:33:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 14:33:15,541 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-08-29 14:33:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 14:33:15,541 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 14:33:15,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-08-29 14:33:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 14:33:15,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 14:33:15,543 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-08-29 14:33:15,543 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-08-29 14:33:15,543 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2021-08-29 14:33:15,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-29 14:33:15,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-29 14:33:15,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 14:33:15,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:33:15,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:33:15,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:33:15,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:33:15,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 14:33:28,192 WARN L210 SmtUtils]: Spent 12.28s on a formula simplification. DAG size of input: 88 DAG size of output: 23 [2021-08-29 14:33:40,910 WARN L210 SmtUtils]: Spent 12.72s on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2021-08-29 14:33:46,526 WARN L210 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-08-29 14:33:46,528 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-29 14:33:46,528 INFO L858 garLoopResultBuilder]: For program point L44(lines 44 54) no Hoare annotation was computed. [2021-08-29 14:33:46,528 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 54) no Hoare annotation was computed. [2021-08-29 14:33:46,528 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 14:33:46,528 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 14:33:46,528 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 14:33:46,528 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-29 14:33:46,528 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-08-29 14:33:46,528 INFO L854 garLoopResultBuilder]: At program point L12-2(lines 37 38) the Hoare annotation is: (and (= ULTIMATE.start_assume_abort_if_not_~cond 1) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0))) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~x~0 10) (<= 0 ULTIMATE.start_main_~a~0) (<= 0 ULTIMATE.start_main_~x~0)) [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L12-3(lines 12 15) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L8(lines 8 10) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L8-1(lines 8 10) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L854 garLoopResultBuilder]: At program point L12-5(lines 11 17) the Hoare annotation is: (let ((.cse8 (<= 0 ULTIMATE.start_main_~a~0)) (.cse9 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (let ((.cse3 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse0 (= ULTIMATE.start_main_~a~0 0)) (.cse1 (let ((.cse10 (mod ULTIMATE.start_main_~b~0 2)) (.cse11 (mod ULTIMATE.start_main_~a~0 2))) (or (and (< 0 .cse10) (<= 0 ULTIMATE.start_main_~b~0)) (and (< 0 .cse11) .cse8) (let ((.cse13 (div ULTIMATE.start_main_~a~0 2)) (.cse14 (div ULTIMATE.start_main_~b~0 2))) (let ((.cse12 (* 4 (* .cse13 ULTIMATE.start_main_~p~0 .cse14)))) (and (or (= .cse10 0) (= .cse9 (+ ULTIMATE.start_main_~q~0 .cse12 (* 4 (* .cse13 ULTIMATE.start_main_~p~0))))) (or (= (+ ULTIMATE.start_main_~q~0 .cse12 (* 4 (* ULTIMATE.start_main_~p~0 .cse14))) .cse9) (= 0 .cse11)))))))) (.cse2 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse4 (= .cse9 (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0)))) (.cse5 (<= 1 ULTIMATE.start_main_~y~0)) (.cse6 (<= ULTIMATE.start_main_~x~0 10)) (.cse7 (<= 0 ULTIMATE.start_main_~x~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and .cse1 .cse2 (= ULTIMATE.start_main_~b~0 0) .cse3 .cse4 .cse5 .cse6 .cse8 .cse7) (and .cse0 .cse1 .cse2 .cse4 .cse5 (<= 1 ULTIMATE.start_main_~b~0) .cse6 .cse7)))) [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 8 10) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L861 garLoopResultBuilder]: At program point L12-8(lines 11 17) the Hoare annotation is: true [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L9-2(line 9) no Hoare annotation was computed. [2021-08-29 14:33:46,529 INFO L858 garLoopResultBuilder]: For program point L9-4(line 9) no Hoare annotation was computed. [2021-08-29 14:33:46,530 INFO L858 garLoopResultBuilder]: For program point L34-2(lines 34 55) no Hoare annotation was computed. [2021-08-29 14:33:46,530 INFO L861 garLoopResultBuilder]: At program point L59(lines 19 60) the Hoare annotation is: true [2021-08-29 14:33:46,530 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-29 14:33:46,530 INFO L858 garLoopResultBuilder]: For program point L47(lines 47 54) no Hoare annotation was computed. [2021-08-29 14:33:46,530 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= ULTIMATE.start_main_~x~0 10)) (.cse2 (<= 0 ULTIMATE.start_main_~x~0))) (or (and .cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~p~0 1) (<= 1 ULTIMATE.start_main_~b~0) (= ULTIMATE.start_main_~q~0 0) .cse1 (<= ULTIMATE.start_main_~y~0 10) .cse2 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0))) (<= 1 ULTIMATE.start_main_~y~0) .cse1 (<= 0 ULTIMATE.start_main_~a~0) .cse2))) [2021-08-29 14:33:46,533 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 14:33:46,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:33:46 BoogieIcfgContainer [2021-08-29 14:33:46,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 14:33:46,550 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 14:33:46,550 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 14:33:46,550 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 14:33:46,551 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:31:48" (3/4) ... [2021-08-29 14:33:46,553 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 14:33:46,561 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-08-29 14:33:46,561 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 14:33:46,562 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 14:33:46,562 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 14:33:46,592 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 14:33:46,592 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 14:33:46,593 INFO L158 Benchmark]: Toolchain (without parser) took 118537.61ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 37.7MB in the beginning and 67.0MB in the end (delta: -29.3MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. [2021-08-29 14:33:46,593 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 58.7MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:33:46,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.00ms. Allocated memory is still 58.7MB. Free memory was 37.5MB in the beginning and 42.8MB in the end (delta: -5.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 14:33:46,594 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.89ms. Allocated memory is still 58.7MB. Free memory was 42.8MB in the beginning and 41.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 14:33:46,594 INFO L158 Benchmark]: Boogie Preprocessor took 17.20ms. Allocated memory is still 58.7MB. Free memory was 41.1MB in the beginning and 39.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 14:33:46,594 INFO L158 Benchmark]: RCFGBuilder took 220.38ms. Allocated memory is still 58.7MB. Free memory was 39.8MB in the beginning and 30.5MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 14:33:46,595 INFO L158 Benchmark]: TraceAbstraction took 117985.25ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 30.1MB in the beginning and 26.6MB in the end (delta: 3.5MB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. [2021-08-29 14:33:46,595 INFO L158 Benchmark]: Witness Printer took 42.60ms. Allocated memory is still 86.0MB. Free memory was 26.2MB in the beginning and 67.0MB in the end (delta: -40.8MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2021-08-29 14:33:46,596 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 58.7MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 223.00ms. Allocated memory is still 58.7MB. Free memory was 37.5MB in the beginning and 42.8MB in the end (delta: -5.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.89ms. Allocated memory is still 58.7MB. Free memory was 42.8MB in the beginning and 41.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.20ms. Allocated memory is still 58.7MB. Free memory was 41.1MB in the beginning and 39.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 220.38ms. Allocated memory is still 58.7MB. Free memory was 39.8MB in the beginning and 30.5MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 117985.25ms. Allocated memory was 58.7MB in the beginning and 86.0MB in the end (delta: 27.3MB). Free memory was 30.1MB in the beginning and 26.6MB in the end (delta: 3.5MB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. * Witness Printer took 42.60ms. Allocated memory is still 86.0MB. Free memory was 26.2MB in the beginning and 67.0MB in the end (delta: -40.8MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 117903.85ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 22.05ms, AutomataDifference: 64920.27ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 30774.46ms, InitialAbstractionConstructionTime: 9.69ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 503 SdHoareTripleChecker+Valid, 11530.22ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 503 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 11297.28ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 85 IncrementalHoareTripleChecker+Unchecked, 342 mSDsCounter, 196 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1168 IncrementalHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 196 mSolverCounterUnsat, 0 mSDtfsCounter, 1168 mSolverCounterSat, 12.47ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 245 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 59016.56ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=6, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 95.25ms AutomataMinimizationTime, 11 MinimizatonAttempts, 102 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 18 NumberOfFragments, 414 HoareAnnotationTreeSize, 5 FomulaSimplifications, 14775 FormulaSimplificationTreeSizeReduction, 158.43ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 8273 FormulaSimplificationTreeSizeReductionInter, 30610.19ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 63.75ms SsaConstructionTime, 171.96ms SatisfiabilityAnalysisTime, 19127.03ms InterpolantComputationTime, 188 NumberOfCodeBlocks, 188 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 210 ConstructedInterpolants, 4 QuantifiedInterpolants, 2491 SizeOfPredicates, 88 NumberOfNonLiveVariables, 869 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 13 InterpolantComputations, 10 PerfectInterpolantSequences, 18/25 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((((cond == 1 && 1 <= cond) && x * y == q + a * p * b) && 1 <= y) && x <= 10) && 0 <= a) && 0 <= x - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((cond == 1 && a == x) && p == 1) && 1 <= b) && q == 0) && x <= 10) && y <= 10) && 0 <= x) && b == y) || ((((((cond == 1 && 1 <= cond) && x * y == q + a * p * b) && 1 <= y) && x <= 10) && 0 <= a) && 0 <= x) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((((((((a == 0 && (((0 < b % 2 && 0 <= b) || (0 < a % 2 && 0 <= a)) || ((b % 2 == 0 || x * y == q + 4 * (a / 2 * p * (b / 2)) + 4 * (a / 2 * p)) && (q + 4 * (a / 2 * p * (b / 2)) + 4 * (p * (b / 2)) == x * y || 0 == a % 2)))) && cond == 1) && 1 <= cond) && x * y == q + a * p * b) && 1 <= y) && x <= 10) && 0 <= x) || (((((((((((0 < b % 2 && 0 <= b) || (0 < a % 2 && 0 <= a)) || ((b % 2 == 0 || x * y == q + 4 * (a / 2 * p * (b / 2)) + 4 * (a / 2 * p)) && (q + 4 * (a / 2 * p * (b / 2)) + 4 * (p * (b / 2)) == x * y || 0 == a % 2))) && cond == 1) && b == 0) && 1 <= cond) && x * y == q + a * p * b) && 1 <= y) && x <= 10) && 0 <= a) && 0 <= x)) || (((((((a == 0 && (((0 < b % 2 && 0 <= b) || (0 < a % 2 && 0 <= a)) || ((b % 2 == 0 || x * y == q + 4 * (a / 2 * p * (b / 2)) + 4 * (a / 2 * p)) && (q + 4 * (a / 2 * p * (b / 2)) + 4 * (p * (b / 2)) == x * y || 0 == a % 2)))) && cond == 1) && x * y == q + a * p * b) && 1 <= y) && 1 <= b) && x <= 10) && 0 <= x) RESULT: Ultimate proved your program to be correct! [2021-08-29 14:33:46,625 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...