./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/insertion_sort-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/loops/insertion_sort-2.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 e6909fdbd47ee7cc9ac1cfcb139a86d0e022eb1f9eab8a625d6818fa3999b29d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:25:04,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:25:04,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:25:04,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:25:04,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:25:04,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:25:04,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:25:04,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:25:04,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:25:04,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:25:04,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:25:04,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:25:04,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:25:04,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:25:04,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:25:04,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:25:04,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:25:04,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:25:04,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:25:04,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:25:04,595 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:25:04,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:25:04,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:25:04,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:25:04,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:25:04,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:25:04,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:25:04,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:25:04,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:25:04,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:25:04,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:25:04,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:25:04,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:25:04,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:25:04,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:25:04,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:25:04,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:25:04,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:25:04,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:25:04,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:25:04,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:25:04,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:25:04,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:25:04,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:25:04,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:25:04,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:25:04,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:25:04,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:25:04,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:25:04,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:25:04,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:25:04,651 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:25:04,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:25:04,652 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:25:04,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:25:04,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:25:04,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:25:04,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:25:04,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:25:04,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:25:04,654 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:25:04,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:25:04,654 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:25:04,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:25:04,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:25:04,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:25:04,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:25:04,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:25:04,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:25:04,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:25:04,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:25:04,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:25:04,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:25:04,656 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:25:04,657 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:25:04,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:25:04,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6909fdbd47ee7cc9ac1cfcb139a86d0e022eb1f9eab8a625d6818fa3999b29d [2022-07-13 15:25:04,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:25:04,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:25:04,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:25:04,911 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:25:04,911 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:25:04,912 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/insertion_sort-2.c [2022-07-13 15:25:04,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d939002c/6d3bb41fb6fc4acbbf8788247eac24fd/FLAG3b2b2789c [2022-07-13 15:25:05,394 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:25:05,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/insertion_sort-2.c [2022-07-13 15:25:05,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d939002c/6d3bb41fb6fc4acbbf8788247eac24fd/FLAG3b2b2789c [2022-07-13 15:25:05,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d939002c/6d3bb41fb6fc4acbbf8788247eac24fd [2022-07-13 15:25:05,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:25:05,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:25:05,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:25:05,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:25:05,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:25:05,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:25:05" (1/1) ... [2022-07-13 15:25:05,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f26a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:05, skipping insertion in model container [2022-07-13 15:25:05,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:25:05" (1/1) ... [2022-07-13 15:25:05,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:25:05,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:25:05,964 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/loops/insertion_sort-2.c[328,341] [2022-07-13 15:25:05,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:25:05,998 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:25:06,011 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/loops/insertion_sort-2.c[328,341] [2022-07-13 15:25:06,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:25:06,044 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:25:06,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06 WrapperNode [2022-07-13 15:25:06,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:25:06,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:25:06,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:25:06,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:25:06,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (1/1) ... [2022-07-13 15:25:06,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (1/1) ... [2022-07-13 15:25:06,081 INFO L137 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-07-13 15:25:06,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:25:06,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:25:06,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:25:06,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:25:06,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (1/1) ... [2022-07-13 15:25:06,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (1/1) ... [2022-07-13 15:25:06,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (1/1) ... [2022-07-13 15:25:06,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (1/1) ... [2022-07-13 15:25:06,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (1/1) ... [2022-07-13 15:25:06,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (1/1) ... [2022-07-13 15:25:06,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (1/1) ... [2022-07-13 15:25:06,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:25:06,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:25:06,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:25:06,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:25:06,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (1/1) ... [2022-07-13 15:25:06,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:25:06,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:25:06,147 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) [2022-07-13 15:25:06,156 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 [2022-07-13 15:25:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:25:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:25:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 15:25:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 15:25:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:25:06,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:25:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 15:25:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 15:25:06,262 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:25:06,263 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:25:06,464 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:25:06,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:25:06,469 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 15:25:06,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:25:06 BoogieIcfgContainer [2022-07-13 15:25:06,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:25:06,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:25:06,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:25:06,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:25:06,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:25:05" (1/3) ... [2022-07-13 15:25:06,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ade048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:25:06, skipping insertion in model container [2022-07-13 15:25:06,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:25:06" (2/3) ... [2022-07-13 15:25:06,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ade048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:25:06, skipping insertion in model container [2022-07-13 15:25:06,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:25:06" (3/3) ... [2022-07-13 15:25:06,485 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2022-07-13 15:25:06,497 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:25:06,511 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:25:06,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:25:06,552 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@196ae1cf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@72cc6544 [2022-07-13 15:25:06,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:25:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 15:25:06,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:06,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:06,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1991822609, now seen corresponding path program 1 times [2022-07-13 15:25:06,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:06,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655659130] [2022-07-13 15:25:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:06,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:25:06,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:06,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655659130] [2022-07-13 15:25:06,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655659130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:25:06,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:25:06,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:25:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934750928] [2022-07-13 15:25:06,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:25:06,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:25:06,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:06,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:25:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:25:06,800 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:06,810 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-07-13 15:25:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:25:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-13 15:25:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:06,827 INFO L225 Difference]: With dead ends: 40 [2022-07-13 15:25:06,834 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 15:25:06,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:25:06,840 INFO L413 NwaCegarLoop]: 26 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, 26 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 [2022-07-13 15:25:06,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:25:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 15:25:06,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-13 15:25:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-07-13 15:25:06,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 9 [2022-07-13 15:25:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:06,882 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-07-13 15:25:06,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-07-13 15:25:06,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 15:25:06,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:06,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:06,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:25:06,884 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:06,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2015834155, now seen corresponding path program 1 times [2022-07-13 15:25:06,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:06,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233088460] [2022-07-13 15:25:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:06,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:25:06,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233088460] [2022-07-13 15:25:06,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233088460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:25:06,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:25:06,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:25:06,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852983934] [2022-07-13 15:25:06,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:25:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:25:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:25:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:25:06,994 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:07,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:07,035 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-07-13 15:25:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:25:07,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-13 15:25:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:07,036 INFO L225 Difference]: With dead ends: 37 [2022-07-13 15:25:07,036 INFO L226 Difference]: Without dead ends: 20 [2022-07-13 15:25:07,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:25:07,038 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:25:07,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 48 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:25:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-13 15:25:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-07-13 15:25:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-13 15:25:07,043 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-07-13 15:25:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:07,043 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-13 15:25:07,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-13 15:25:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 15:25:07,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:07,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:07,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:25:07,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:07,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:07,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1565261075, now seen corresponding path program 1 times [2022-07-13 15:25:07,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:07,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700663601] [2022-07-13 15:25:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:07,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:25:07,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:07,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700663601] [2022-07-13 15:25:07,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700663601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:25:07,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740141304] [2022-07-13 15:25:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:07,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:07,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:25:07,187 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) [2022-07-13 15:25:07,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:25:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 15:25:07,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:25:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:25:07,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:25:07,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740141304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:25:07,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 15:25:07,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-07-13 15:25:07,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841350577] [2022-07-13 15:25:07,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:25:07,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:25:07,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:07,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:25:07,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 15:25:07,375 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:07,441 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-07-13 15:25:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:25:07,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 15:25:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:07,443 INFO L225 Difference]: With dead ends: 33 [2022-07-13 15:25:07,443 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 15:25:07,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-13 15:25:07,445 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:25:07,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:25:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 15:25:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2022-07-13 15:25:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:07,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-07-13 15:25:07,451 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-07-13 15:25:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:07,451 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-07-13 15:25:07,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-07-13 15:25:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 15:25:07,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:07,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:07,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:25:07,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:07,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:07,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1929667994, now seen corresponding path program 1 times [2022-07-13 15:25:07,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:07,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784668029] [2022-07-13 15:25:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:07,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:25:07,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:07,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784668029] [2022-07-13 15:25:07,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784668029] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:25:07,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181288401] [2022-07-13 15:25:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:07,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:07,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:25:07,832 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) [2022-07-13 15:25:07,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:25:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 15:25:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:25:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:25:07,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:25:10,393 WARN L833 $PredicateComparison]: unable to prove that (forall ((|aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| Int) (|aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| Int)) (or (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|) (<= (+ |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| 4294967295 (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|)) 0) (< (mod |c_ULTIMATE.start_main_~j~0#1| 4294967296) (mod (+ (* |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| 4294967295) 1) 4294967296)) (<= 0 |aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|))) is different from false [2022-07-13 15:25:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-13 15:25:17,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181288401] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:25:17,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:25:17,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-07-13 15:25:17,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677146160] [2022-07-13 15:25:17,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:25:17,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 15:25:17,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:17,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 15:25:17,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=4, NotChecked=16, Total=110 [2022-07-13 15:25:17,562 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:18,371 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-07-13 15:25:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:25:18,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-13 15:25:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:18,374 INFO L225 Difference]: With dead ends: 43 [2022-07-13 15:25:18,375 INFO L226 Difference]: Without dead ends: 28 [2022-07-13 15:25:18,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=4, NotChecked=20, Total=156 [2022-07-13 15:25:18,376 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:25:18,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 89 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-07-13 15:25:18,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-13 15:25:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-07-13 15:25:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-13 15:25:18,381 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2022-07-13 15:25:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:18,381 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-13 15:25:18,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:18,382 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-13 15:25:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 15:25:18,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:18,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:18,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:25:18,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 15:25:18,603 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash 797223332, now seen corresponding path program 2 times [2022-07-13 15:25:18,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:18,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698686872] [2022-07-13 15:25:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:18,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:25:18,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698686872] [2022-07-13 15:25:18,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698686872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:25:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523611564] [2022-07-13 15:25:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:25:18,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:18,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:25:18,979 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) [2022-07-13 15:25:19,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:25:19,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:25:19,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:25:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 15:25:19,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:25:19,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 15:25:19,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 15:25:19,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:25:19,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-13 15:25:19,355 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:25:19,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-13 15:25:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:25:19,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:25:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:25:19,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523611564] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 15:25:19,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 15:25:19,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13, 13] total 26 [2022-07-13 15:25:19,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109292743] [2022-07-13 15:25:19,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:25:19,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 15:25:19,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:19,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 15:25:19,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-07-13 15:25:19,655 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:19,727 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-07-13 15:25:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 15:25:19,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-13 15:25:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:19,728 INFO L225 Difference]: With dead ends: 33 [2022-07-13 15:25:19,728 INFO L226 Difference]: Without dead ends: 31 [2022-07-13 15:25:19,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-07-13 15:25:19,730 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:25:19,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-07-13 15:25:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-13 15:25:19,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-13 15:25:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-07-13 15:25:19,735 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 19 [2022-07-13 15:25:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:19,735 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-07-13 15:25:19,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-07-13 15:25:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 15:25:19,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:19,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:19,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 15:25:19,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:19,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:19,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1477281702, now seen corresponding path program 1 times [2022-07-13 15:25:19,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:19,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001693962] [2022-07-13 15:25:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:19,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:25:19,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:19,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001693962] [2022-07-13 15:25:19,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001693962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:25:19,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:25:19,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 15:25:19,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554331546] [2022-07-13 15:25:19,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:25:19,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 15:25:19,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 15:25:19,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:25:19,986 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:20,041 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-07-13 15:25:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 15:25:20,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-13 15:25:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:20,053 INFO L225 Difference]: With dead ends: 54 [2022-07-13 15:25:20,053 INFO L226 Difference]: Without dead ends: 41 [2022-07-13 15:25:20,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-13 15:25:20,055 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:25:20,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:25:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-13 15:25:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-07-13 15:25:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-07-13 15:25:20,061 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2022-07-13 15:25:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:20,061 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-07-13 15:25:20,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-07-13 15:25:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 15:25:20,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:20,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:20,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 15:25:20,062 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:20,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1495294633, now seen corresponding path program 1 times [2022-07-13 15:25:20,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:20,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394353889] [2022-07-13 15:25:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:20,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:25:20,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:20,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394353889] [2022-07-13 15:25:20,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394353889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:25:20,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691639987] [2022-07-13 15:25:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:20,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:20,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:25:20,138 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) [2022-07-13 15:25:20,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:25:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 15:25:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:25:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:25:20,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:25:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:25:20,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691639987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:25:20,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:25:20,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-07-13 15:25:20,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938480426] [2022-07-13 15:25:20,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:25:20,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 15:25:20,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:20,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 15:25:20,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:25:20,243 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:20,324 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-07-13 15:25:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 15:25:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-13 15:25:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:20,326 INFO L225 Difference]: With dead ends: 73 [2022-07-13 15:25:20,326 INFO L226 Difference]: Without dead ends: 60 [2022-07-13 15:25:20,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-07-13 15:25:20,327 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:25:20,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 121 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:25:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-13 15:25:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2022-07-13 15:25:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-13 15:25:20,334 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2022-07-13 15:25:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:20,335 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-13 15:25:20,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-13 15:25:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 15:25:20,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:20,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:20,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:25:20,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:20,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash -815236263, now seen corresponding path program 1 times [2022-07-13 15:25:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:20,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334375037] [2022-07-13 15:25:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:20,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:25:20,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:20,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334375037] [2022-07-13 15:25:20,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334375037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:25:20,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372539751] [2022-07-13 15:25:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:20,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:20,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:25:20,924 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) [2022-07-13 15:25:20,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:25:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:20,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-13 15:25:20,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:25:21,079 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-07-13 15:25:21,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-07-13 15:25:21,276 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-07-13 15:25:21,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-07-13 15:25:21,447 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-07-13 15:25:21,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-07-13 15:25:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:25:21,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:25:21,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2022-07-13 15:25:21,805 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-13 15:25:21,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 383 treesize of output 347 [2022-07-13 15:25:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 15:25:22,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372539751] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:25:22,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:25:22,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 32 [2022-07-13 15:25:22,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696928053] [2022-07-13 15:25:22,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:25:22,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 15:25:22,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:22,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 15:25:22,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=849, Unknown=1, NotChecked=0, Total=992 [2022-07-13 15:25:22,760 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:37,493 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2022-07-13 15:25:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 15:25:37,494 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-13 15:25:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:37,495 INFO L225 Difference]: With dead ends: 97 [2022-07-13 15:25:37,495 INFO L226 Difference]: Without dead ends: 95 [2022-07-13 15:25:37,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=352, Invalid=2403, Unknown=1, NotChecked=0, Total=2756 [2022-07-13 15:25:37,496 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:25:37,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 273 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 271 Invalid, 0 Unknown, 268 Unchecked, 0.2s Time] [2022-07-13 15:25:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-13 15:25:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 43. [2022-07-13 15:25:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-07-13 15:25:37,505 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 22 [2022-07-13 15:25:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:37,505 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-07-13 15:25:37,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-07-13 15:25:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 15:25:37,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:37,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:37,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 15:25:37,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:37,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:37,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:37,708 INFO L85 PathProgramCache]: Analyzing trace with hash 755836794, now seen corresponding path program 1 times [2022-07-13 15:25:37,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:37,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985129818] [2022-07-13 15:25:37,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:37,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:25:37,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985129818] [2022-07-13 15:25:37,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985129818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:25:37,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369086075] [2022-07-13 15:25:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:37,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:37,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:25:37,806 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) [2022-07-13 15:25:37,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 15:25:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:37,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 15:25:37,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:25:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:25:37,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:25:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:25:38,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369086075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:25:38,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:25:38,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-13 15:25:38,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053884052] [2022-07-13 15:25:38,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:25:38,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 15:25:38,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:38,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 15:25:38,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-13 15:25:38,130 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:38,302 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-07-13 15:25:38,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 15:25:38,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-13 15:25:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:38,303 INFO L225 Difference]: With dead ends: 118 [2022-07-13 15:25:38,303 INFO L226 Difference]: Without dead ends: 69 [2022-07-13 15:25:38,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-13 15:25:38,304 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:25:38,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 140 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:25:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-13 15:25:38,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2022-07-13 15:25:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-07-13 15:25:38,313 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 23 [2022-07-13 15:25:38,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:38,313 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-07-13 15:25:38,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-07-13 15:25:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 15:25:38,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:38,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:38,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 15:25:38,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:38,515 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1735350921, now seen corresponding path program 1 times [2022-07-13 15:25:38,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:38,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674931149] [2022-07-13 15:25:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:38,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 15:25:38,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:38,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674931149] [2022-07-13 15:25:38,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674931149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:25:38,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88540550] [2022-07-13 15:25:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:38,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:38,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:25:38,573 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) [2022-07-13 15:25:38,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 15:25:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:38,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 15:25:38,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:25:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 15:25:38,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:25:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 15:25:38,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88540550] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:25:38,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:25:38,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-07-13 15:25:38,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982760043] [2022-07-13 15:25:38,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:25:38,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 15:25:38,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:38,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 15:25:38,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:25:38,672 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:38,815 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2022-07-13 15:25:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 15:25:38,816 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-13 15:25:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:38,816 INFO L225 Difference]: With dead ends: 101 [2022-07-13 15:25:38,816 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 15:25:38,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-07-13 15:25:38,817 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 99 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:25:38,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 65 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:25:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 15:25:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2022-07-13 15:25:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-13 15:25:38,822 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 27 [2022-07-13 15:25:38,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:38,823 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-13 15:25:38,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-13 15:25:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 15:25:38,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:38,823 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:38,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 15:25:39,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:39,036 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 17457638, now seen corresponding path program 2 times [2022-07-13 15:25:39,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:39,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826525545] [2022-07-13 15:25:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 15:25:39,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:39,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826525545] [2022-07-13 15:25:39,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826525545] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:25:39,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336635882] [2022-07-13 15:25:39,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:25:39,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:39,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:25:39,472 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) [2022-07-13 15:25:39,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 15:25:39,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:25:39,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:25:39,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 15:25:39,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:25:39,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 15:25:39,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-13 15:25:39,755 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 15:25:39,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-13 15:25:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 15:25:39,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:25:41,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-07-13 15:25:41,960 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-07-13 15:25:41,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2022-07-13 15:25:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 15:25:42,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336635882] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:25:42,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:25:42,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 12] total 29 [2022-07-13 15:25:42,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944276594] [2022-07-13 15:25:42,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:25:42,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 15:25:42,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:25:42,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 15:25:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=676, Unknown=1, NotChecked=0, Total=812 [2022-07-13 15:25:42,070 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:25:43,178 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2022-07-13 15:25:43,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 15:25:43,179 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-13 15:25:43,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:25:43,180 INFO L225 Difference]: With dead ends: 120 [2022-07-13 15:25:43,180 INFO L226 Difference]: Without dead ends: 118 [2022-07-13 15:25:43,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=582, Invalid=2387, Unknown=1, NotChecked=0, Total=2970 [2022-07-13 15:25:43,182 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 158 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:25:43,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 228 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 365 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-07-13 15:25:43,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-13 15:25:43,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 65. [2022-07-13 15:25:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.21875) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-07-13 15:25:43,192 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 30 [2022-07-13 15:25:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:25:43,192 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-07-13 15:25:43,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:25:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-07-13 15:25:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 15:25:43,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:25:43,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:25:43,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 15:25:43,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 15:25:43,416 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:25:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:25:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1513919954, now seen corresponding path program 2 times [2022-07-13 15:25:43,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:25:43,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960750619] [2022-07-13 15:25:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:25:43,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:25:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:25:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:25:43,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:25:43,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960750619] [2022-07-13 15:25:43,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960750619] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:25:43,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932892495] [2022-07-13 15:25:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:25:43,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:25:43,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:25:43,830 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) [2022-07-13 15:25:43,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 15:25:43,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:25:43,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:25:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 15:25:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:25:44,018 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-13 15:25:44,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2022-07-13 15:25:44,173 INFO L356 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2022-07-13 15:25:44,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2022-07-13 15:25:44,345 INFO L356 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2022-07-13 15:25:44,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-07-13 15:25:44,450 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-07-13 15:25:44,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2022-07-13 15:25:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 15:25:44,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:26:27,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-07-13 15:26:27,381 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-13 15:26:27,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 11739 treesize of output 11353