./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn5f.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/array-fpi/eqn5f.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 b8372a31944d45846edae8fd3de2e59236f8e911 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 01:56:11,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 01:56:11,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 01:56:11,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 01:56:11,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 01:56:11,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 01:56:11,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 01:56:11,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 01:56:11,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 01:56:11,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 01:56:11,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 01:56:11,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 01:56:11,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 01:56:11,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 01:56:11,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 01:56:11,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 01:56:11,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 01:56:11,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 01:56:11,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 01:56:11,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 01:56:11,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 01:56:11,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 01:56:11,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 01:56:11,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 01:56:11,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 01:56:11,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 01:56:11,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 01:56:11,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 01:56:11,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 01:56:11,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 01:56:11,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 01:56:11,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 01:56:11,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 01:56:11,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 01:56:11,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 01:56:11,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 01:56:11,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 01:56:11,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 01:56:11,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 01:56:11,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 01:56:11,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 01:56:11,798 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 01:56:11,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 01:56:11,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 01:56:11,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 01:56:11,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 01:56:11,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 01:56:11,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 01:56:11,827 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 01:56:11,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 01:56:11,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 01:56:11,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 01:56:11,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 01:56:11,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 01:56:11,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 01:56:11,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 01:56:11,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 01:56:11,829 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 01:56:11,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 01:56:11,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 01:56:11,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 01:56:11,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 01:56:11,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 01:56:11,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 01:56:11,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 01:56:11,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 01:56:11,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 01:56:11,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 01:56:11,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 01:56:11,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 01:56:11,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 01:56:11,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 01:56:11,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8372a31944d45846edae8fd3de2e59236f8e911 [2021-08-29 01:56:12,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 01:56:12,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 01:56:12,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 01:56:12,101 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 01:56:12,102 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 01:56:12,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn5f.c [2021-08-29 01:56:12,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0808a1c5e/6fd1ad3b69434e43923577e0aa9051e3/FLAG6fb982f2a [2021-08-29 01:56:12,521 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 01:56:12,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5f.c [2021-08-29 01:56:12,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0808a1c5e/6fd1ad3b69434e43923577e0aa9051e3/FLAG6fb982f2a [2021-08-29 01:56:12,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0808a1c5e/6fd1ad3b69434e43923577e0aa9051e3 [2021-08-29 01:56:12,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 01:56:12,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 01:56:12,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 01:56:12,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 01:56:12,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 01:56:12,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 01:56:12" (1/1) ... [2021-08-29 01:56:12,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9ade7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:12, skipping insertion in model container [2021-08-29 01:56:12,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 01:56:12" (1/1) ... [2021-08-29 01:56:12,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 01:56:13,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 01:56:13,118 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/array-fpi/eqn5f.c[588,601] [2021-08-29 01:56:13,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 01:56:13,132 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 01:56:13,142 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/array-fpi/eqn5f.c[588,601] [2021-08-29 01:56:13,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 01:56:13,192 INFO L208 MainTranslator]: Completed translation [2021-08-29 01:56:13,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13 WrapperNode [2021-08-29 01:56:13,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 01:56:13,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 01:56:13,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 01:56:13,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 01:56:13,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (1/1) ... [2021-08-29 01:56:13,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (1/1) ... [2021-08-29 01:56:13,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 01:56:13,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 01:56:13,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 01:56:13,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 01:56:13,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (1/1) ... [2021-08-29 01:56:13,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (1/1) ... [2021-08-29 01:56:13,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (1/1) ... [2021-08-29 01:56:13,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (1/1) ... [2021-08-29 01:56:13,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (1/1) ... [2021-08-29 01:56:13,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (1/1) ... [2021-08-29 01:56:13,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (1/1) ... [2021-08-29 01:56:13,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 01:56:13,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 01:56:13,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 01:56:13,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 01:56:13,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (1/1) ... [2021-08-29 01:56:13,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 01:56:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:56:13,267 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 01:56:13,274 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 01:56:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 01:56:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 01:56:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 01:56:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 01:56:13,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 01:56:13,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 01:56:13,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 01:56:13,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 01:56:13,392 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-29 01:56:13,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:56:13 BoogieIcfgContainer [2021-08-29 01:56:13,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 01:56:13,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 01:56:13,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 01:56:13,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 01:56:13,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 01:56:12" (1/3) ... [2021-08-29 01:56:13,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6abfd70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 01:56:13, skipping insertion in model container [2021-08-29 01:56:13,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 01:56:13" (2/3) ... [2021-08-29 01:56:13,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6abfd70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 01:56:13, skipping insertion in model container [2021-08-29 01:56:13,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:56:13" (3/3) ... [2021-08-29 01:56:13,398 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2021-08-29 01:56:13,401 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 01:56:13,401 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 01:56:13,428 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 01:56:13,432 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 01:56:13,432 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 01:56:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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 01:56:13,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 01:56:13,444 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:56:13,445 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:56:13,445 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:56:13,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:56:13,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-29 01:56:13,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:56:13,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409933900] [2021-08-29 01:56:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:13,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:56:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:56:13,565 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 01:56:13,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:56:13,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409933900] [2021-08-29 01:56:13,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409933900] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:56:13,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:56:13,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 01:56:13,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833515639] [2021-08-29 01:56:13,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 01:56:13,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:56:13,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 01:56:13,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 01:56:13,587 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:56:13,623 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-29 01:56:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 01:56:13,625 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 01:56:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:56:13,629 INFO L225 Difference]: With dead ends: 38 [2021-08-29 01:56:13,629 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 01:56:13,631 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 01:56:13,633 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.36ms IncrementalHoareTripleChecker+Time [2021-08-29 01:56:13,634 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.17ms Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 27.36ms Time] [2021-08-29 01:56:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 01:56:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-29 01:56:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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 01:56:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-29 01:56:13,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-29 01:56:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:56:13,651 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-29 01:56:13,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-29 01:56:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 01:56:13,651 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:56:13,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:56:13,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 01:56:13,652 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:56:13,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:56:13,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-29 01:56:13,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:56:13,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368644595] [2021-08-29 01:56:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:13,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:56:13,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:56:13,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988722896] [2021-08-29 01:56:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:13,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:56:13,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:56:13,669 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 01:56:13,670 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 01:56:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:56:13,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 01:56:13,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:56:13,771 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-29 01:56:13,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-08-29 01:56:13,858 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 01:56:13,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 01:56:13,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:56:13,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368644595] [2021-08-29 01:56:13,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:56:13,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988722896] [2021-08-29 01:56:13,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988722896] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:56:13,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:56:13,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 01:56:13,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424607307] [2021-08-29 01:56:13,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 01:56:13,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:56:13,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 01:56:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 01:56:13,881 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:56:13,969 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-08-29 01:56:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 01:56:13,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 01:56:13,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:56:13,971 INFO L225 Difference]: With dead ends: 34 [2021-08-29 01:56:13,971 INFO L226 Difference]: Without dead ends: 32 [2021-08-29 01:56:13,972 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.54ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-29 01:56:13,973 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.61ms IncrementalHoareTripleChecker+Time [2021-08-29 01:56:13,973 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 67.61ms Time] [2021-08-29 01:56:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-29 01:56:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-08-29 01:56:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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 01:56:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-29 01:56:13,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-29 01:56:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:56:13,982 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-29 01:56:13,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-29 01:56:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 01:56:13,984 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:56:13,984 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:56:14,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 01:56:14,219 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 01:56:14,220 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:56:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:56:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-29 01:56:14,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:56:14,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289450606] [2021-08-29 01:56:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:14,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:56:14,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:56:14,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083962032] [2021-08-29 01:56:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:14,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:56:14,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:56:14,253 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 01:56:14,254 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 01:56:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:56:14,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 01:56:14,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:56:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:56:14,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 01:56:14,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:56:14,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289450606] [2021-08-29 01:56:14,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:56:14,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083962032] [2021-08-29 01:56:14,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083962032] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:56:14,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:56:14,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 01:56:14,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167690415] [2021-08-29 01:56:14,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 01:56:14,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:56:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 01:56:14,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 01:56:14,372 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:56:14,445 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-08-29 01:56:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 01:56:14,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-29 01:56:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:56:14,447 INFO L225 Difference]: With dead ends: 49 [2021-08-29 01:56:14,447 INFO L226 Difference]: Without dead ends: 40 [2021-08-29 01:56:14,447 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.22ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-29 01:56:14,450 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.47ms IncrementalHoareTripleChecker+Time [2021-08-29 01:56:14,451 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [9 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 45.47ms Time] [2021-08-29 01:56:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-29 01:56:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-08-29 01:56:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-29 01:56:14,460 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-29 01:56:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:56:14,460 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-29 01:56:14,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-29 01:56:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 01:56:14,461 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:56:14,461 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:56:14,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 01:56:14,680 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 01:56:14,681 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:56:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:56:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-29 01:56:14,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:56:14,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502166410] [2021-08-29 01:56:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:14,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:56:14,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:56:14,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175277471] [2021-08-29 01:56:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:14,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:56:14,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:56:14,733 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 01:56:14,776 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 01:56:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:56:14,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 01:56:14,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:56:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:56:14,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:56:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:56:14,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:56:14,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502166410] [2021-08-29 01:56:14,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:56:14,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175277471] [2021-08-29 01:56:14,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175277471] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:56:14,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:56:14,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-29 01:56:14,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259057162] [2021-08-29 01:56:14,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 01:56:14,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:56:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 01:56:14,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-29 01:56:14,882 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:56:14,968 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-08-29 01:56:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 01:56:14,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-29 01:56:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:56:14,969 INFO L225 Difference]: With dead ends: 44 [2021-08-29 01:56:14,969 INFO L226 Difference]: Without dead ends: 37 [2021-08-29 01:56:14,969 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.58ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-29 01:56:14,970 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.26ms IncrementalHoareTripleChecker+Time [2021-08-29 01:56:14,970 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 118 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [12 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 58.26ms Time] [2021-08-29 01:56:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-29 01:56:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-08-29 01:56:14,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) 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 01:56:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-29 01:56:14,973 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-08-29 01:56:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:56:14,973 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-29 01:56:14,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:14,973 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-29 01:56:14,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 01:56:14,973 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:56:14,973 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:56:14,992 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 01:56:15,189 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 01:56:15,189 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:56:15,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:56:15,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-29 01:56:15,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:56:15,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950673596] [2021-08-29 01:56:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:15,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:56:15,208 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:56:15,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205699683] [2021-08-29 01:56:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:15,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:56:15,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:56:15,209 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 01:56:15,229 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 01:56:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:56:15,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 01:56:15,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:56:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:56:15,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 01:56:15,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:56:15,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950673596] [2021-08-29 01:56:15,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:56:15,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205699683] [2021-08-29 01:56:15,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205699683] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 01:56:15,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 01:56:15,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 01:56:15,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147805225] [2021-08-29 01:56:15,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 01:56:15,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:56:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 01:56:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-29 01:56:15,316 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:15,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:56:15,372 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-08-29 01:56:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 01:56:15,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 01:56:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:56:15,373 INFO L225 Difference]: With dead ends: 41 [2021-08-29 01:56:15,373 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 01:56:15,374 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.36ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-29 01:56:15,374 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.63ms IncrementalHoareTripleChecker+Time [2021-08-29 01:56:15,374 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 84 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 39.63ms Time] [2021-08-29 01:56:15,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 01:56:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-08-29 01:56:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-29 01:56:15,376 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-08-29 01:56:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:56:15,377 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-29 01:56:15,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:15,377 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-29 01:56:15,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 01:56:15,377 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:56:15,377 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:56:15,408 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 01:56:15,598 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 01:56:15,598 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:56:15,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:56:15,599 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-29 01:56:15,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:56:15,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853775047] [2021-08-29 01:56:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:15,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:56:15,608 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:56:15,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190533504] [2021-08-29 01:56:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:15,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:56:15,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:56:15,609 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 01:56:15,611 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 01:56:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 01:56:15,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-29 01:56:15,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:56:15,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-29 01:56:15,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-29 01:56:15,722 INFO L354 Elim1Store]: treesize reduction 74, result has 26.0 percent of original size [2021-08-29 01:56:15,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 52 [2021-08-29 01:56:15,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 01:56:15,918 INFO L354 Elim1Store]: treesize reduction 204, result has 13.2 percent of original size [2021-08-29 01:56:15,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 70 [2021-08-29 01:56:16,354 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 01:56:16,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:56:20,687 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 01:56:20,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:56:20,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853775047] [2021-08-29 01:56:20,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:56:20,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190533504] [2021-08-29 01:56:20,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190533504] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:56:20,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:56:20,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-29 01:56:20,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860414525] [2021-08-29 01:56:20,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 01:56:20,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:56:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 01:56:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=93, Unknown=5, NotChecked=0, Total=132 [2021-08-29 01:56:20,690 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:56:22,569 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-08-29 01:56:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 01:56:22,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 01:56:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:56:22,570 INFO L225 Difference]: With dead ends: 41 [2021-08-29 01:56:22,571 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 01:56:22,571 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 6156.94ms TimeCoverageRelationStatistics Valid=47, Invalid=129, Unknown=6, NotChecked=0, Total=182 [2021-08-29 01:56:22,572 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.69ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 75.04ms IncrementalHoareTripleChecker+Time [2021-08-29 01:56:22,575 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.69ms Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 43 Unchecked, 75.04ms Time] [2021-08-29 01:56:22,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 01:56:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-08-29 01:56:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-08-29 01:56:22,581 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 16 [2021-08-29 01:56:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:56:22,581 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-08-29 01:56:22,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 01:56:22,581 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-08-29 01:56:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 01:56:22,582 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:56:22,582 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:56:22,616 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 01:56:22,799 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 01:56:22,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:56:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:56:22,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-08-29 01:56:22,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:56:22,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972998811] [2021-08-29 01:56:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:22,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:56:22,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:56:22,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589369570] [2021-08-29 01:56:22,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 01:56:22,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:56:22,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:56:22,820 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 01:56:22,821 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 01:56:22,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 01:56:22,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 01:56:22,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 01:56:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 01:56:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:56:22,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 01:56:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 01:56:22,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 01:56:22,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972998811] [2021-08-29 01:56:22,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 01:56:22,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589369570] [2021-08-29 01:56:22,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589369570] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 01:56:22,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 01:56:22,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-29 01:56:22,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652858343] [2021-08-29 01:56:22,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 01:56:22,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 01:56:22,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 01:56:22,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-29 01:56:22,948 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 01:56:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 01:56:23,039 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-08-29 01:56:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 01:56:23,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 18 [2021-08-29 01:56:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 01:56:23,040 INFO L225 Difference]: With dead ends: 67 [2021-08-29 01:56:23,040 INFO L226 Difference]: Without dead ends: 58 [2021-08-29 01:56:23,040 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 47.14ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-29 01:56:23,041 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.59ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.46ms IncrementalHoareTripleChecker+Time [2021-08-29 01:56:23,041 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.59ms Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 58.46ms Time] [2021-08-29 01:56:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-29 01:56:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 34. [2021-08-29 01:56:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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 01:56:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-08-29 01:56:23,045 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-08-29 01:56:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 01:56:23,045 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-08-29 01:56:23,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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 01:56:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-08-29 01:56:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 01:56:23,046 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 01:56:23,046 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 01:56:23,064 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 01:56:23,262 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 01:56:23,262 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 01:56:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 01:56:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-08-29 01:56:23,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 01:56:23,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721527135] [2021-08-29 01:56:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:23,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 01:56:23,271 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 01:56:23,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892496624] [2021-08-29 01:56:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 01:56:23,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 01:56:23,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 01:56:23,272 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 01:56:23,273 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 01:56:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 01:56:23,306 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 01:56:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 01:56:23,332 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 01:56:23,333 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 01:56:23,333 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 01:56:23,355 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 01:56:23,535 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 01:56:23,539 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 01:56:23,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 01:56:23 BoogieIcfgContainer [2021-08-29 01:56:23,571 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 01:56:23,572 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 01:56:23,572 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 01:56:23,572 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 01:56:23,573 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 01:56:13" (3/4) ... [2021-08-29 01:56:23,574 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 01:56:23,612 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 01:56:23,612 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 01:56:23,613 INFO L158 Benchmark]: Toolchain (without parser) took 10659.87ms. Allocated memory was 69.2MB in the beginning and 102.8MB in the end (delta: 33.6MB). Free memory was 51.4MB in the beginning and 61.1MB in the end (delta: -9.8MB). Peak memory consumption was 22.8MB. Max. memory is 16.1GB. [2021-08-29 01:56:23,613 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory is still 51.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 01:56:23,613 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.41ms. Allocated memory is still 69.2MB. Free memory was 51.1MB in the beginning and 53.0MB in the end (delta: -1.9MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2021-08-29 01:56:23,614 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.67ms. Allocated memory is still 69.2MB. Free memory was 53.0MB in the beginning and 51.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 01:56:23,614 INFO L158 Benchmark]: Boogie Preprocessor took 13.80ms. Allocated memory is still 69.2MB. Free memory was 51.4MB in the beginning and 50.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 01:56:23,614 INFO L158 Benchmark]: RCFGBuilder took 157.61ms. Allocated memory is still 69.2MB. Free memory was 50.0MB in the beginning and 40.6MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 01:56:23,614 INFO L158 Benchmark]: TraceAbstraction took 10177.01ms. Allocated memory was 69.2MB in the beginning and 102.8MB in the end (delta: 33.6MB). Free memory was 40.4MB in the beginning and 64.3MB in the end (delta: -23.9MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2021-08-29 01:56:23,615 INFO L158 Benchmark]: Witness Printer took 40.33ms. Allocated memory is still 102.8MB. Free memory was 64.3MB in the beginning and 61.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 01:56:23,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory is still 51.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.41ms. Allocated memory is still 69.2MB. Free memory was 51.1MB in the beginning and 53.0MB in the end (delta: -1.9MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.67ms. Allocated memory is still 69.2MB. Free memory was 53.0MB in the beginning and 51.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.80ms. Allocated memory is still 69.2MB. Free memory was 51.4MB in the beginning and 50.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 157.61ms. Allocated memory is still 69.2MB. Free memory was 50.0MB in the beginning and 40.6MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10177.01ms. Allocated memory was 69.2MB in the beginning and 102.8MB in the end (delta: 33.6MB). Free memory was 40.4MB in the beginning and 64.3MB in the end (delta: -23.9MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * Witness Printer took 40.33ms. Allocated memory is still 102.8MB. Free memory was 64.3MB in the beginning and 61.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 1 [L32] b[0] = 1 [L33] i=1 VAL [N=2] [L33] COND TRUE i