./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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-multidimensional/copy-partial-2-n-u.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 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:38:35,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:38:35,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:38:35,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:38:35,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:38:35,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:38:35,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:38:35,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:38:35,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:38:35,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:38:35,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:38:35,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:38:35,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:38:35,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:38:35,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:38:35,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:38:35,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:38:35,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:38:35,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:38:35,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:38:35,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:38:35,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:38:35,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:38:35,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:38:35,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:38:35,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:38:35,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:38:35,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:38:35,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:38:35,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:38:35,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:38:35,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:38:35,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:38:35,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:38:35,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:38:35,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:38:35,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:38:35,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:38:35,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:38:35,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:38:35,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:38:35,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:38:35,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:38:35,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:38:35,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:38:35,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:38:35,898 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:38:35,898 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:38:35,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:38:35,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:38:35,900 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:38:35,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:38:35,901 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:38:35,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:38:35,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:38:35,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:38:35,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:38:35,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:38:35,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:38:35,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:38:35,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:38:35,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:38:35,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:38:35,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:38:35,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:38:35,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:38:35,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:38:35,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:38:35,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:38:35,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:38:35,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:38:35,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:38:35,905 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:38:35,906 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:38:35,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:38:35,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2021-12-27 21:38:36,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:38:36,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:38:36,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:38:36,211 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:38:36,211 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:38:36,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2021-12-27 21:38:36,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304ebe745/f1e7a752c663414083dfbe4efa8d756d/FLAGd60a64796 [2021-12-27 21:38:36,681 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:38:36,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2021-12-27 21:38:36,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304ebe745/f1e7a752c663414083dfbe4efa8d756d/FLAGd60a64796 [2021-12-27 21:38:37,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/304ebe745/f1e7a752c663414083dfbe4efa8d756d [2021-12-27 21:38:37,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:38:37,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:38:37,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:38:37,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:38:37,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:38:37,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34007b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37, skipping insertion in model container [2021-12-27 21:38:37,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:38:37,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:38:37,206 WARN L230 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-multidimensional/copy-partial-2-n-u.c[416,429] [2021-12-27 21:38:37,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:38:37,238 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:38:37,250 WARN L230 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-multidimensional/copy-partial-2-n-u.c[416,429] [2021-12-27 21:38:37,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:38:37,309 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:38:37,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37 WrapperNode [2021-12-27 21:38:37,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:38:37,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:38:37,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:38:37,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:38:37,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,348 INFO L137 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2021-12-27 21:38:37,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:38:37,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:38:37,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:38:37,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:38:37,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:38:37,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:38:37,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:38:37,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:38:37,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (1/1) ... [2021-12-27 21:38:37,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:38:37,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:37,425 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) [2021-12-27 21:38:37,446 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 [2021-12-27 21:38:37,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:38:37,461 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-27 21:38:37,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-27 21:38:37,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:38:37,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-27 21:38:37,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:38:37,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:38:37,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:38:37,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:38:37,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-27 21:38:37,524 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:38:37,525 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:38:37,658 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:38:37,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:38:37,663 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-27 21:38:37,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:38:37 BoogieIcfgContainer [2021-12-27 21:38:37,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:38:37,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:38:37,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:38:37,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:38:37,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:38:37" (1/3) ... [2021-12-27 21:38:37,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c2eafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:38:37, skipping insertion in model container [2021-12-27 21:38:37,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:38:37" (2/3) ... [2021-12-27 21:38:37,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c2eafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:38:37, skipping insertion in model container [2021-12-27 21:38:37,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:38:37" (3/3) ... [2021-12-27 21:38:37,671 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2021-12-27 21:38:37,675 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:38:37,675 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:38:37,707 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:38:37,712 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-27 21:38:37,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:38:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:37,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:38:37,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:37,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:37,760 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:37,774 INFO L85 PathProgramCache]: Analyzing trace with hash -897666833, now seen corresponding path program 1 times [2021-12-27 21:38:37,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:37,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255200048] [2021-12-27 21:38:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:37,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:37,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:37,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47263520] [2021-12-27 21:38:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:37,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:37,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:37,856 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) [2021-12-27 21:38:37,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:38:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:37,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-27 21:38:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-27 21:38:38,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:38:38,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:38,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255200048] [2021-12-27 21:38:38,038 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:38,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47263520] [2021-12-27 21:38:38,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47263520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:38:38,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:38:38,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:38:38,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632060469] [2021-12-27 21:38:38,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:38:38,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:38:38,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:38:38,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:38:38,077 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:38,097 INFO L93 Difference]: Finished difference Result 53 states and 82 transitions. [2021-12-27 21:38:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:38:38,099 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-12-27 21:38:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:38,110 INFO L225 Difference]: With dead ends: 53 [2021-12-27 21:38:38,110 INFO L226 Difference]: Without dead ends: 24 [2021-12-27 21:38:38,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:38:38,120 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:38,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:38:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-27 21:38:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-27 21:38:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-27 21:38:38,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 21 [2021-12-27 21:38:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:38,165 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-27 21:38:38,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-27 21:38:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:38:38,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:38,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:38,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-27 21:38:38,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-27 21:38:38,391 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:38,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2067117999, now seen corresponding path program 1 times [2021-12-27 21:38:38,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:38,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710549390] [2021-12-27 21:38:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:38,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:38,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:38,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591803575] [2021-12-27 21:38:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:38,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:38,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:38,417 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) [2021-12-27 21:38:38,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:38:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:38,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 21:38:38,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:38:38,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:38:38,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710549390] [2021-12-27 21:38:38,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:38,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591803575] [2021-12-27 21:38:38,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591803575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:38:38,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:38:38,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:38:38,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5263257] [2021-12-27 21:38:38,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:38:38,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:38:38,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:38,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:38:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:38:38,581 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 21:38:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:38,647 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-12-27 21:38:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:38:38,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-12-27 21:38:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:38,649 INFO L225 Difference]: With dead ends: 50 [2021-12-27 21:38:38,649 INFO L226 Difference]: Without dead ends: 38 [2021-12-27 21:38:38,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:38:38,651 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:38,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 38 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:38:38,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-27 21:38:38,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2021-12-27 21:38:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-12-27 21:38:38,658 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 21 [2021-12-27 21:38:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:38,660 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-27 21:38:38,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 21:38:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-12-27 21:38:38,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 21:38:38,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:38,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:38,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 21:38:38,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-27 21:38:38,881 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:38,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:38,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1849346137, now seen corresponding path program 1 times [2021-12-27 21:38:38,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:38,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615240720] [2021-12-27 21:38:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:38,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:38,891 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:38,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256611503] [2021-12-27 21:38:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:38,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:38,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:38,894 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) [2021-12-27 21:38:38,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:38:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:38,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 21:38:38,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:38:39,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:38:39,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:39,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615240720] [2021-12-27 21:38:39,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:39,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256611503] [2021-12-27 21:38:39,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256611503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:38:39,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:38:39,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:38:39,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280786819] [2021-12-27 21:38:39,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:38:39,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:38:39,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:38:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:38:39,019 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 21:38:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:39,054 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-12-27 21:38:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:38:39,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-27 21:38:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:39,055 INFO L225 Difference]: With dead ends: 52 [2021-12-27 21:38:39,055 INFO L226 Difference]: Without dead ends: 37 [2021-12-27 21:38:39,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:38:39,057 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:39,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 43 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:38:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-27 21:38:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2021-12-27 21:38:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-27 21:38:39,067 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 24 [2021-12-27 21:38:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:39,068 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-27 21:38:39,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 21:38:39,068 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-27 21:38:39,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-27 21:38:39,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:39,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:39,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:38:39,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:39,288 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2114191326, now seen corresponding path program 1 times [2021-12-27 21:38:39,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:39,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664505570] [2021-12-27 21:38:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:39,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:39,303 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:39,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810470476] [2021-12-27 21:38:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:39,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:39,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:39,306 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) [2021-12-27 21:38:39,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:38:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:39,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:38:39,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:38:39,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:38:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 21:38:39,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664505570] [2021-12-27 21:38:39,517 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810470476] [2021-12-27 21:38:39,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810470476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:38:39,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:38:39,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-27 21:38:39,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596458600] [2021-12-27 21:38:39,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:38:39,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-27 21:38:39,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-27 21:38:39,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:38:39,520 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:38:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:39,617 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2021-12-27 21:38:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 21:38:39,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-12-27 21:38:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:39,619 INFO L225 Difference]: With dead ends: 89 [2021-12-27 21:38:39,619 INFO L226 Difference]: Without dead ends: 73 [2021-12-27 21:38:39,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-27 21:38:39,620 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:39,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 67 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:38:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-27 21:38:39,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 29. [2021-12-27 21:38:39,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-12-27 21:38:39,629 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2021-12-27 21:38:39,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:39,629 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-12-27 21:38:39,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:38:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-12-27 21:38:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-27 21:38:39,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:39,631 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:39,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 21:38:39,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:39,853 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:39,854 INFO L85 PathProgramCache]: Analyzing trace with hash 256970087, now seen corresponding path program 2 times [2021-12-27 21:38:39,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:39,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693598390] [2021-12-27 21:38:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:39,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:39,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:39,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832728082] [2021-12-27 21:38:39,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:38:39,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:39,865 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) [2021-12-27 21:38:39,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:38:39,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-27 21:38:39,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:38:39,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-27 21:38:39,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-27 21:38:39,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:38:39,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:39,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693598390] [2021-12-27 21:38:39,994 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:39,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832728082] [2021-12-27 21:38:39,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832728082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:38:39,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:38:39,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 21:38:39,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513453020] [2021-12-27 21:38:39,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:38:39,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 21:38:39,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:39,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 21:38:39,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:38:39,997 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 21:38:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:40,043 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-12-27 21:38:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 21:38:40,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-27 21:38:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:40,047 INFO L225 Difference]: With dead ends: 53 [2021-12-27 21:38:40,048 INFO L226 Difference]: Without dead ends: 45 [2021-12-27 21:38:40,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-27 21:38:40,051 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:40,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:38:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-27 21:38:40,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-12-27 21:38:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-12-27 21:38:40,076 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 28 [2021-12-27 21:38:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:40,077 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-12-27 21:38:40,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 21:38:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-12-27 21:38:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 21:38:40,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:40,078 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:40,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:38:40,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:40,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1830663741, now seen corresponding path program 1 times [2021-12-27 21:38:40,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:40,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674404678] [2021-12-27 21:38:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:40,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:40,310 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:40,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911893201] [2021-12-27 21:38:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:40,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:40,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:40,311 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) [2021-12-27 21:38:40,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:38:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:40,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-27 21:38:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:38:40,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:38:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:38:40,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674404678] [2021-12-27 21:38:40,554 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911893201] [2021-12-27 21:38:40,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911893201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:38:40,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:38:40,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-27 21:38:40,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010641039] [2021-12-27 21:38:40,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:38:40,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-27 21:38:40,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:40,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-27 21:38:40,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-27 21:38:40,557 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:38:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:40,827 INFO L93 Difference]: Finished difference Result 166 states and 213 transitions. [2021-12-27 21:38:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-27 21:38:40,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-12-27 21:38:40,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:40,829 INFO L225 Difference]: With dead ends: 166 [2021-12-27 21:38:40,830 INFO L226 Difference]: Without dead ends: 146 [2021-12-27 21:38:40,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:38:40,832 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 305 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:40,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 119 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:38:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-27 21:38:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 36. [2021-12-27 21:38:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-27 21:38:40,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 31 [2021-12-27 21:38:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:40,851 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-27 21:38:40,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:38:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-27 21:38:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-27 21:38:40,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:40,856 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:40,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-27 21:38:41,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:41,072 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:41,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1107716387, now seen corresponding path program 2 times [2021-12-27 21:38:41,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:41,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929730342] [2021-12-27 21:38:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:41,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:41,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:41,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690480762] [2021-12-27 21:38:41,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:38:41,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:41,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:41,087 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) [2021-12-27 21:38:41,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:38:41,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:38:41,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:38:41,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-27 21:38:41,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:38:41,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:38:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-27 21:38:41,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929730342] [2021-12-27 21:38:41,625 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:41,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690480762] [2021-12-27 21:38:41,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690480762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:38:41,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:38:41,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-12-27 21:38:41,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032934371] [2021-12-27 21:38:41,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:38:41,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-27 21:38:41,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:41,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-27 21:38:41,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-27 21:38:41,629 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:38:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:42,319 INFO L93 Difference]: Finished difference Result 316 states and 405 transitions. [2021-12-27 21:38:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-27 21:38:42,320 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2021-12-27 21:38:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:42,322 INFO L225 Difference]: With dead ends: 316 [2021-12-27 21:38:42,322 INFO L226 Difference]: Without dead ends: 290 [2021-12-27 21:38:42,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-27 21:38:42,323 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1056 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:42,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 201 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-27 21:38:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-12-27 21:38:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 48. [2021-12-27 21:38:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-12-27 21:38:42,337 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2021-12-27 21:38:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:42,337 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-12-27 21:38:42,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:38:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-12-27 21:38:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-27 21:38:42,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:42,339 INFO L514 BasicCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:42,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-27 21:38:42,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:42,551 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:42,552 INFO L85 PathProgramCache]: Analyzing trace with hash 633180131, now seen corresponding path program 3 times [2021-12-27 21:38:42,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:42,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442133807] [2021-12-27 21:38:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:42,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:42,568 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:42,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065701376] [2021-12-27 21:38:42,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:38:42,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:42,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:42,584 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:38:42,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:38:42,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-27 21:38:42,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:38:42,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:38:42,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-12-27 21:38:42,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:38:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-12-27 21:38:42,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:42,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442133807] [2021-12-27 21:38:42,901 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:42,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065701376] [2021-12-27 21:38:42,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065701376] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:38:42,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:38:42,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-27 21:38:42,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365101991] [2021-12-27 21:38:42,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:38:42,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-27 21:38:42,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:42,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-27 21:38:42,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:38:42,904 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:38:43,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:43,003 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2021-12-27 21:38:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 21:38:43,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-12-27 21:38:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:43,004 INFO L225 Difference]: With dead ends: 178 [2021-12-27 21:38:43,004 INFO L226 Difference]: Without dead ends: 165 [2021-12-27 21:38:43,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-27 21:38:43,005 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:43,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 76 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:38:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-27 21:38:43,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2021-12-27 21:38:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.0756302521008403) internal successors, (128), 119 states have internal predecessors, (128), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 132 transitions. [2021-12-27 21:38:43,026 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 132 transitions. Word has length 49 [2021-12-27 21:38:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:43,026 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 132 transitions. [2021-12-27 21:38:43,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:38:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 132 transitions. [2021-12-27 21:38:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-27 21:38:43,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:43,028 INFO L514 BasicCegarLoop]: trace histogram [88, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:43,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-27 21:38:43,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-27 21:38:43,252 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1798415483, now seen corresponding path program 4 times [2021-12-27 21:38:43,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:43,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759907302] [2021-12-27 21:38:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:43,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:43,308 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:43,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234014783] [2021-12-27 21:38:43,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:38:43,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:43,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:43,320 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:38:43,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:38:43,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:38:43,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:38:43,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:38:43,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4206 trivial. 0 not checked. [2021-12-27 21:38:43,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 21:38:43,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:43,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759907302] [2021-12-27 21:38:43,588 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:43,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234014783] [2021-12-27 21:38:43,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234014783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:38:43,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:38:43,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:38:43,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410626938] [2021-12-27 21:38:43,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:38:43,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:38:43,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:38:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:38:43,590 INFO L87 Difference]: Start difference. First operand 123 states and 132 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 21:38:43,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:43,659 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2021-12-27 21:38:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:38:43,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 124 [2021-12-27 21:38:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:43,661 INFO L225 Difference]: With dead ends: 153 [2021-12-27 21:38:43,661 INFO L226 Difference]: Without dead ends: 130 [2021-12-27 21:38:43,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-27 21:38:43,662 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:43,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:38:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-27 21:38:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-12-27 21:38:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.0743801652892562) internal successors, (130), 121 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2021-12-27 21:38:43,687 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 124 [2021-12-27 21:38:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:43,687 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2021-12-27 21:38:43,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 21:38:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2021-12-27 21:38:43,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-27 21:38:43,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:43,689 INFO L514 BasicCegarLoop]: trace histogram [88, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:43,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-27 21:38:43,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:43,911 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1395447138, now seen corresponding path program 1 times [2021-12-27 21:38:43,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:43,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150896237] [2021-12-27 21:38:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:43,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:43,960 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:43,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042802059] [2021-12-27 21:38:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:43,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:43,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:43,962 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:38:43,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-27 21:38:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:38:44,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-27 21:38:44,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 1591 proven. 253 refuted. 0 times theorem prover too weak. 2364 trivial. 0 not checked. [2021-12-27 21:38:44,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:38:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 1591 proven. 253 refuted. 0 times theorem prover too weak. 2364 trivial. 0 not checked. [2021-12-27 21:38:45,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:45,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150896237] [2021-12-27 21:38:45,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042802059] [2021-12-27 21:38:45,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042802059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:38:45,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:38:45,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-27 21:38:45,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313716181] [2021-12-27 21:38:45,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:38:45,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-27 21:38:45,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-27 21:38:45,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-12-27 21:38:45,509 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:38:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:38:47,514 INFO L93 Difference]: Finished difference Result 813 states and 1060 transitions. [2021-12-27 21:38:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-27 21:38:47,515 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 125 [2021-12-27 21:38:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:38:47,518 INFO L225 Difference]: With dead ends: 813 [2021-12-27 21:38:47,518 INFO L226 Difference]: Without dead ends: 721 [2021-12-27 21:38:47,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-12-27 21:38:47,521 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1883 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 819 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1883 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 819 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-27 21:38:47,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1883 Valid, 329 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [819 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-27 21:38:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-27 21:38:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 221. [2021-12-27 21:38:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.0414746543778801) internal successors, (226), 217 states have internal predecessors, (226), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:38:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2021-12-27 21:38:47,549 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 125 [2021-12-27 21:38:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:38:47,550 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2021-12-27 21:38:47,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:38:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2021-12-27 21:38:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-27 21:38:47,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:38:47,552 INFO L514 BasicCegarLoop]: trace histogram [184, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:38:47,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-27 21:38:47,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-27 21:38:47,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:38:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:38:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash -387556706, now seen corresponding path program 2 times [2021-12-27 21:38:47,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:38:47,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509208794] [2021-12-27 21:38:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:38:47,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:38:47,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:38:47,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483462566] [2021-12-27 21:38:47,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:38:47,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:38:47,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:38:47,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:38:47,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-27 21:38:48,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:38:48,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:38:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-27 21:38:48,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:38:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17600 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 9888 trivial. 0 not checked. [2021-12-27 21:38:49,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:38:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17600 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 9888 trivial. 0 not checked. [2021-12-27 21:38:52,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:38:52,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509208794] [2021-12-27 21:38:52,374 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:38:52,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483462566] [2021-12-27 21:38:52,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483462566] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:38:52,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:38:52,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2021-12-27 21:38:52,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984165147] [2021-12-27 21:38:52,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:38:52,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-27 21:38:52,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:38:52,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-27 21:38:52,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2021-12-27 21:38:52,380 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 98 states have internal predecessors, (120), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:39:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:39:03,259 INFO L93 Difference]: Finished difference Result 1605 states and 2092 transitions. [2021-12-27 21:39:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-27 21:39:03,260 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 98 states have internal predecessors, (120), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 221 [2021-12-27 21:39:03,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:39:03,266 INFO L225 Difference]: With dead ends: 1605 [2021-12-27 21:39:03,266 INFO L226 Difference]: Without dead ends: 1441 [2021-12-27 21:39:03,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2021-12-27 21:39:03,271 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3976 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 3031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3976 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 3610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3031 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-27 21:39:03,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3976 Valid, 615 Invalid, 3610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3031 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-27 21:39:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-12-27 21:39:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 413. [2021-12-27 21:39:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 409 states have (on average 1.02200488997555) internal successors, (418), 409 states have internal predecessors, (418), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:39:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 422 transitions. [2021-12-27 21:39:03,316 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 422 transitions. Word has length 221 [2021-12-27 21:39:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:39:03,316 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 422 transitions. [2021-12-27 21:39:03,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 98 states have internal predecessors, (120), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:39:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 422 transitions. [2021-12-27 21:39:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-12-27 21:39:03,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:39:03,321 INFO L514 BasicCegarLoop]: trace histogram [376, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:39:03,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-27 21:39:03,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-27 21:39:03,535 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:39:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:39:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1904821602, now seen corresponding path program 3 times [2021-12-27 21:39:03,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:39:03,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107187097] [2021-12-27 21:39:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:39:03,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:39:03,647 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:39:03,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783257309] [2021-12-27 21:39:03,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:39:03,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:39:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:39:03,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:39:03,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-27 21:39:03,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-27 21:39:03,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:39:03,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-27 21:39:03,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:39:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72032 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72031 trivial. 0 not checked. [2021-12-27 21:39:04,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:39:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 72032 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72031 trivial. 0 not checked. [2021-12-27 21:39:05,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:39:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107187097] [2021-12-27 21:39:05,372 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:39:05,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783257309] [2021-12-27 21:39:05,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783257309] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:39:05,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:39:05,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-27 21:39:05,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900182414] [2021-12-27 21:39:05,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:39:05,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-27 21:39:05,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:39:05,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-27 21:39:05,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-27 21:39:05,374 INFO L87 Difference]: Start difference. First operand 413 states and 422 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:39:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:39:05,549 INFO L93 Difference]: Finished difference Result 555 states and 575 transitions. [2021-12-27 21:39:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 21:39:05,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 413 [2021-12-27 21:39:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:39:05,553 INFO L225 Difference]: With dead ends: 555 [2021-12-27 21:39:05,553 INFO L226 Difference]: Without dead ends: 546 [2021-12-27 21:39:05,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-27 21:39:05,554 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 143 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:39:05,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 60 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:39:05,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-12-27 21:39:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 425. [2021-12-27 21:39:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.0285035629453683) internal successors, (433), 421 states have internal predecessors, (433), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:39:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 437 transitions. [2021-12-27 21:39:05,605 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 437 transitions. Word has length 413 [2021-12-27 21:39:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:39:05,606 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 437 transitions. [2021-12-27 21:39:05,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-27 21:39:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 437 transitions. [2021-12-27 21:39:05,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2021-12-27 21:39:05,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:39:05,612 INFO L514 BasicCegarLoop]: trace histogram [376, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:39:05,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-27 21:39:05,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-27 21:39:05,827 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:39:05,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:39:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash 755995755, now seen corresponding path program 4 times [2021-12-27 21:39:05,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:39:05,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116058506] [2021-12-27 21:39:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:39:05,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:39:05,921 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:39:05,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173906815] [2021-12-27 21:39:05,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:39:05,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:39:05,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:39:05,923 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:39:05,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-27 21:39:06,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:39:06,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:39:06,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-27 21:39:06,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:39:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72074 backedges. 40 proven. 54169 refuted. 0 times theorem prover too weak. 17865 trivial. 0 not checked. [2021-12-27 21:39:08,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:39:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 72074 backedges. 40 proven. 54169 refuted. 0 times theorem prover too weak. 17865 trivial. 0 not checked. [2021-12-27 21:39:10,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:39:10,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116058506] [2021-12-27 21:39:10,309 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-27 21:39:10,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173906815] [2021-12-27 21:39:10,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173906815] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:39:10,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:39:10,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-12-27 21:39:10,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15904241] [2021-12-27 21:39:10,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:39:10,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-27 21:39:10,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:39:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-27 21:39:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-12-27 21:39:10,312 INFO L87 Difference]: Start difference. First operand 425 states and 437 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-27 21:39:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:39:10,889 INFO L93 Difference]: Finished difference Result 695 states and 724 transitions. [2021-12-27 21:39:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-27 21:39:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 425 [2021-12-27 21:39:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:39:10,893 INFO L225 Difference]: With dead ends: 695 [2021-12-27 21:39:10,893 INFO L226 Difference]: Without dead ends: 668 [2021-12-27 21:39:10,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 823 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=335, Invalid=1071, Unknown=0, NotChecked=0, Total=1406 [2021-12-27 21:39:10,894 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 289 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:39:10,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 153 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:39:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-27 21:39:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 522. [2021-12-27 21:39:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 518 states have (on average 1.0250965250965252) internal successors, (531), 518 states have internal predecessors, (531), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 21:39:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 535 transitions. [2021-12-27 21:39:10,996 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 535 transitions. Word has length 425 [2021-12-27 21:39:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:39:10,997 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 535 transitions. [2021-12-27 21:39:10,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-27 21:39:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 535 transitions. [2021-12-27 21:39:11,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-12-27 21:39:11,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:39:11,003 INFO L514 BasicCegarLoop]: trace histogram [470, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:39:11,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-27 21:39:11,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-27 21:39:11,216 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:39:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:39:11,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1331553155, now seen corresponding path program 5 times [2021-12-27 21:39:11,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:39:11,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268000210] [2021-12-27 21:39:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:39:11,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:39:11,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-27 21:39:11,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150261153] [2021-12-27 21:39:11,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:39:11,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:39:11,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:39:11,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 21:39:11,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process