./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 01:07:27,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 01:07:27,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 01:07:27,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 01:07:27,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 01:07:27,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 01:07:27,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 01:07:27,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 01:07:27,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 01:07:27,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 01:07:27,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 01:07:27,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 01:07:27,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 01:07:27,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 01:07:27,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 01:07:27,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 01:07:27,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 01:07:27,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 01:07:27,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 01:07:27,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 01:07:27,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 01:07:27,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 01:07:27,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 01:07:27,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 01:07:27,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 01:07:27,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 01:07:27,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 01:07:27,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 01:07:27,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 01:07:27,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 01:07:27,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 01:07:27,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 01:07:27,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 01:07:27,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 01:07:27,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 01:07:27,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 01:07:27,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 01:07:27,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 01:07:27,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 01:07:27,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 01:07:27,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 01:07:27,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 01:07:28,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 01:07:28,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 01:07:28,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 01:07:28,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 01:07:28,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 01:07:28,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 01:07:28,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 01:07:28,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 01:07:28,016 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 01:07:28,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 01:07:28,017 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 01:07:28,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 01:07:28,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 01:07:28,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 01:07:28,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 01:07:28,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 01:07:28,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 01:07:28,018 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 01:07:28,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 01:07:28,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 01:07:28,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 01:07:28,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 01:07:28,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 01:07:28,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 01:07:28,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:07:28,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 01:07:28,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 01:07:28,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 01:07:28,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 01:07:28,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 01:07:28,020 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 01:07:28,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 01:07:28,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 01:07:28,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 01:07:28,021 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2021-12-17 01:07:28,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 01:07:28,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 01:07:28,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 01:07:28,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 01:07:28,238 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 01:07:28,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2021-12-17 01:07:28,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22912020c/a19dc50695fe43ff8388d091aa5ff4fd/FLAG085176734 [2021-12-17 01:07:28,670 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 01:07:28,670 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2021-12-17 01:07:28,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22912020c/a19dc50695fe43ff8388d091aa5ff4fd/FLAG085176734 [2021-12-17 01:07:29,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22912020c/a19dc50695fe43ff8388d091aa5ff4fd [2021-12-17 01:07:29,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 01:07:29,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 01:07:29,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 01:07:29,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 01:07:29,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 01:07:29,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61426212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29, skipping insertion in model container [2021-12-17 01:07:29,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 01:07:29,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 01:07:29,182 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2021-12-17 01:07:29,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:07:29,196 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 01:07:29,203 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2021-12-17 01:07:29,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 01:07:29,216 INFO L208 MainTranslator]: Completed translation [2021-12-17 01:07:29,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29 WrapperNode [2021-12-17 01:07:29,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 01:07:29,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 01:07:29,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 01:07:29,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 01:07:29,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,229 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,247 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2021-12-17 01:07:29,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 01:07:29,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 01:07:29,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 01:07:29,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 01:07:29,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 01:07:29,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 01:07:29,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 01:07:29,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 01:07:29,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (1/1) ... [2021-12-17 01:07:29,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 01:07:29,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:29,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 01:07:29,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 01:07:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 01:07:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 01:07:29,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 01:07:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 01:07:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 01:07:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 01:07:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 01:07:29,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 01:07:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 01:07:29,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 01:07:29,407 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 01:07:29,408 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 01:07:29,530 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 01:07:29,533 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 01:07:29,534 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 01:07:29,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:07:29 BoogieIcfgContainer [2021-12-17 01:07:29,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 01:07:29,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 01:07:29,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 01:07:29,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 01:07:29,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 01:07:29" (1/3) ... [2021-12-17 01:07:29,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f13adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:07:29, skipping insertion in model container [2021-12-17 01:07:29,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:07:29" (2/3) ... [2021-12-17 01:07:29,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f13adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:07:29, skipping insertion in model container [2021-12-17 01:07:29,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:07:29" (3/3) ... [2021-12-17 01:07:29,560 INFO L111 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2021-12-17 01:07:29,563 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 01:07:29,563 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 01:07:29,595 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 01:07:29,601 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 01:07:29,606 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 01:07:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 01:07:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 01:07:29,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:29,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:29,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:29,635 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2021-12-17 01:07:29,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:29,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797409318] [2021-12-17 01:07:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:29,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:29,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:29,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 01:07:29,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:29,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797409318] [2021-12-17 01:07:29,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797409318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:07:29,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:07:29,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 01:07:29,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815704613] [2021-12-17 01:07:29,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:07:29,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 01:07:29,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 01:07:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 01:07:29,873 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 01:07:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:29,917 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2021-12-17 01:07:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 01:07:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-12-17 01:07:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:29,929 INFO L225 Difference]: With dead ends: 64 [2021-12-17 01:07:29,929 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 01:07:29,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 01:07:29,936 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:29,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 01:07:29,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 01:07:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 01:07:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 01:07:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-17 01:07:29,975 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2021-12-17 01:07:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:29,976 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-17 01:07:29,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 01:07:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-17 01:07:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 01:07:29,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:29,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:29,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 01:07:29,979 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:29,980 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2021-12-17 01:07:29,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:29,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120456252] [2021-12-17 01:07:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:29,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:30,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:30,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 01:07:30,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:30,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120456252] [2021-12-17 01:07:30,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120456252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 01:07:30,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 01:07:30,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 01:07:30,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512734461] [2021-12-17 01:07:30,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 01:07:30,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 01:07:30,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 01:07:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 01:07:30,097 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 01:07:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:30,164 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-12-17 01:07:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 01:07:30,164 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-17 01:07:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:30,165 INFO L225 Difference]: With dead ends: 50 [2021-12-17 01:07:30,165 INFO L226 Difference]: Without dead ends: 36 [2021-12-17 01:07:30,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 01:07:30,166 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:30,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 71 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:07:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-17 01:07:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-12-17 01:07:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 01:07:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-12-17 01:07:30,171 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2021-12-17 01:07:30,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:30,171 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-12-17 01:07:30,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 01:07:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-12-17 01:07:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 01:07:30,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:30,172 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:30,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 01:07:30,172 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:30,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:30,172 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2021-12-17 01:07:30,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:30,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027150489] [2021-12-17 01:07:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:30,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:30,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:30,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:30,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:07:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 01:07:30,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:30,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027150489] [2021-12-17 01:07:30,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027150489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:30,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144264920] [2021-12-17 01:07:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:30,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:30,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:30,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:07:30,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 01:07:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:30,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 01:07:30,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:30,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 01:07:30,675 INFO L388 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 15 treesize of output 7 [2021-12-17 01:07:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 01:07:30,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:07:30,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 01:07:30,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-17 01:07:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 01:07:30,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144264920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:07:30,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:07:30,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2021-12-17 01:07:30,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59644514] [2021-12-17 01:07:30,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:07:30,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 01:07:30,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 01:07:30,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-12-17 01:07:30,887 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 01:07:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:31,113 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-12-17 01:07:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 01:07:31,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2021-12-17 01:07:31,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:31,118 INFO L225 Difference]: With dead ends: 54 [2021-12-17 01:07:31,118 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 01:07:31,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-12-17 01:07:31,121 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:31,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 161 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 197 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2021-12-17 01:07:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 01:07:31,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-17 01:07:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 01:07:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-17 01:07:31,140 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2021-12-17 01:07:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:31,140 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-17 01:07:31,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 01:07:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-17 01:07:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 01:07:31,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:31,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:31,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 01:07:31,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:31,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:31,364 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2021-12-17 01:07:31,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:31,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197175927] [2021-12-17 01:07:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:31,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:31,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:31,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:31,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:07:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 01:07:31,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:31,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197175927] [2021-12-17 01:07:31,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197175927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:31,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297686497] [2021-12-17 01:07:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:31,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:31,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:31,637 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:07:31,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 01:07:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:31,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 01:07:31,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:31,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 01:07:31,916 INFO L388 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 15 treesize of output 7 [2021-12-17 01:07:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 01:07:31,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:07:32,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 01:07:32,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-17 01:07:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 01:07:32,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297686497] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:07:32,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:07:32,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2021-12-17 01:07:32,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268823943] [2021-12-17 01:07:32,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:07:32,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 01:07:32,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:32,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 01:07:32,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-12-17 01:07:32,093 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 01:07:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:32,265 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2021-12-17 01:07:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 01:07:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2021-12-17 01:07:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:32,267 INFO L225 Difference]: With dead ends: 68 [2021-12-17 01:07:32,267 INFO L226 Difference]: Without dead ends: 64 [2021-12-17 01:07:32,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-12-17 01:07:32,268 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:32,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 210 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 265 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-17 01:07:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-17 01:07:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-12-17 01:07:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 01:07:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-17 01:07:32,273 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2021-12-17 01:07:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:32,273 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-17 01:07:32,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 01:07:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-17 01:07:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 01:07:32,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:32,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:32,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 01:07:32,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 01:07:32,481 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2021-12-17 01:07:32,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:32,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695192203] [2021-12-17 01:07:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:32,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:32,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:32,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:32,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:07:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 01:07:32,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:32,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695192203] [2021-12-17 01:07:32,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695192203] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:32,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504589341] [2021-12-17 01:07:32,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:07:32,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:32,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:32,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:07:32,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 01:07:32,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:07:32,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:07:32,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 01:07:32,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 01:07:32,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:07:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 01:07:32,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504589341] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:07:32,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:07:32,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-17 01:07:32,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068129998] [2021-12-17 01:07:32,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:07:32,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 01:07:32,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:32,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 01:07:32,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-17 01:07:32,729 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 01:07:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:32,808 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2021-12-17 01:07:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 01:07:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-12-17 01:07:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:32,810 INFO L225 Difference]: With dead ends: 88 [2021-12-17 01:07:32,810 INFO L226 Difference]: Without dead ends: 69 [2021-12-17 01:07:32,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-17 01:07:32,823 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:32,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 103 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:07:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-17 01:07:32,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2021-12-17 01:07:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 01:07:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-12-17 01:07:32,829 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2021-12-17 01:07:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:32,829 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-12-17 01:07:32,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-17 01:07:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-12-17 01:07:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 01:07:32,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:32,831 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:32,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 01:07:33,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:33,040 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2021-12-17 01:07:33,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:33,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713132654] [2021-12-17 01:07:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:33,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:33,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:33,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:33,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:07:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:33,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:07:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 01:07:33,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:33,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713132654] [2021-12-17 01:07:33,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713132654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:33,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314155816] [2021-12-17 01:07:33,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:07:33,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:33,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:33,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:07:33,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 01:07:33,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 01:07:33,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:07:33,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 01:07:33,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 01:07:33,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:07:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 01:07:33,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314155816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:07:33,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:07:33,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-17 01:07:33,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769946976] [2021-12-17 01:07:33,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:07:33,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 01:07:33,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:33,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 01:07:33,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-17 01:07:33,286 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-17 01:07:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:33,373 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-12-17 01:07:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 01:07:33,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2021-12-17 01:07:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:33,375 INFO L225 Difference]: With dead ends: 59 [2021-12-17 01:07:33,375 INFO L226 Difference]: Without dead ends: 51 [2021-12-17 01:07:33,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-17 01:07:33,376 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:33,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 123 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:07:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-17 01:07:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2021-12-17 01:07:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 01:07:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-12-17 01:07:33,380 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2021-12-17 01:07:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:33,380 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-12-17 01:07:33,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-17 01:07:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-12-17 01:07:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 01:07:33,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:33,381 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:33,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 01:07:33,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:33,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:33,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2021-12-17 01:07:33,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:33,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398635773] [2021-12-17 01:07:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:33,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:34,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:34,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:34,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:07:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:34,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:07:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:07:34,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:34,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398635773] [2021-12-17 01:07:34,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398635773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:34,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667245470] [2021-12-17 01:07:34,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:07:34,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:34,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:34,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:07:34,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 01:07:34,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:07:34,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:07:34,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 01:07:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:34,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:07:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:07:34,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:07:34,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:07:34,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-12-17 01:07:34,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:07:34,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 39 [2021-12-17 01:07:34,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-12-17 01:07:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:07:34,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:07:42,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667245470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:42,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:07:42,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2021-12-17 01:07:42,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294244602] [2021-12-17 01:07:42,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:07:42,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 01:07:42,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:42,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 01:07:42,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1770, Unknown=4, NotChecked=0, Total=1980 [2021-12-17 01:07:42,476 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 01:07:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:43,520 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-12-17 01:07:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 01:07:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2021-12-17 01:07:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:43,521 INFO L225 Difference]: With dead ends: 70 [2021-12-17 01:07:43,521 INFO L226 Difference]: Without dead ends: 66 [2021-12-17 01:07:43,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=438, Invalid=3098, Unknown=4, NotChecked=0, Total=3540 [2021-12-17 01:07:43,523 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 73 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:43,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 331 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 716 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2021-12-17 01:07:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-17 01:07:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-12-17 01:07:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 01:07:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2021-12-17 01:07:43,533 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 50 [2021-12-17 01:07:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:43,535 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2021-12-17 01:07:43,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 01:07:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2021-12-17 01:07:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 01:07:43,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:43,537 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:43,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 01:07:43,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:43,759 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:43,759 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2021-12-17 01:07:43,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:43,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723598825] [2021-12-17 01:07:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:43,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:44,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:44,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:44,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:07:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:44,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:07:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:07:44,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:44,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723598825] [2021-12-17 01:07:44,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723598825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:44,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080299699] [2021-12-17 01:07:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:44,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:44,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:44,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:07:44,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 01:07:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:44,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 01:07:44,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:44,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:07:44,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:07:44,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:07:44,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:07:44,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2021-12-17 01:07:44,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:07:44,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-17 01:07:45,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2021-12-17 01:07:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:07:45,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:07:53,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080299699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:53,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:07:53,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2021-12-17 01:07:53,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173883392] [2021-12-17 01:07:53,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:07:53,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 01:07:53,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:07:53,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 01:07:53,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1684, Unknown=4, NotChecked=0, Total=1892 [2021-12-17 01:07:53,704 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 01:07:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:07:54,407 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2021-12-17 01:07:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 01:07:54,407 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2021-12-17 01:07:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:07:54,408 INFO L225 Difference]: With dead ends: 94 [2021-12-17 01:07:54,408 INFO L226 Difference]: Without dead ends: 90 [2021-12-17 01:07:54,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=377, Invalid=2699, Unknown=4, NotChecked=0, Total=3080 [2021-12-17 01:07:54,409 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 01:07:54,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 246 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 396 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2021-12-17 01:07:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-17 01:07:54,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2021-12-17 01:07:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 01:07:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2021-12-17 01:07:54,414 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 50 [2021-12-17 01:07:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:07:54,416 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2021-12-17 01:07:54,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 01:07:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2021-12-17 01:07:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 01:07:54,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:07:54,418 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:07:54,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 01:07:54,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:54,619 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:07:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:07:54,619 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2021-12-17 01:07:54,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:07:54,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39440627] [2021-12-17 01:07:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:07:54,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:07:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:55,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:07:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:55,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:07:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:55,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:07:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:55,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:07:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:07:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:07:55,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:07:55,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39440627] [2021-12-17 01:07:55,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39440627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:07:55,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185943610] [2021-12-17 01:07:55,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:07:55,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:07:55,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:07:55,087 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:07:55,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 01:07:55,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:07:55,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:07:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 01:07:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:07:55,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:07:55,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:07:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:07:55,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:07:55,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-12-17 01:07:55,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:07:55,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 39 [2021-12-17 01:07:55,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-12-17 01:07:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:07:55,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:09,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185943610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:09,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:08:09,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2021-12-17 01:08:09,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986134917] [2021-12-17 01:08:09,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:08:09,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 01:08:09,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:09,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 01:08:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1849, Unknown=7, NotChecked=0, Total=2070 [2021-12-17 01:08:09,594 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 01:08:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:10,881 INFO L93 Difference]: Finished difference Result 138 states and 179 transitions. [2021-12-17 01:08:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 01:08:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2021-12-17 01:08:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:10,883 INFO L225 Difference]: With dead ends: 138 [2021-12-17 01:08:10,883 INFO L226 Difference]: Without dead ends: 134 [2021-12-17 01:08:10,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=528, Invalid=3625, Unknown=7, NotChecked=0, Total=4160 [2021-12-17 01:08:10,885 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 80 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:10,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 262 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 780 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2021-12-17 01:08:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-17 01:08:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 72. [2021-12-17 01:08:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 01:08:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2021-12-17 01:08:10,913 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 50 [2021-12-17 01:08:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:10,914 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2021-12-17 01:08:10,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 01:08:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2021-12-17 01:08:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 01:08:10,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:10,918 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:10,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 01:08:11,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:11,136 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:11,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2021-12-17 01:08:11,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:11,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091053724] [2021-12-17 01:08:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:11,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:11,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:08:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:11,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:08:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:11,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:08:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:11,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:08:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:08:11,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:11,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091053724] [2021-12-17 01:08:11,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091053724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:11,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605441732] [2021-12-17 01:08:11,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:08:11,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:11,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:11,665 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:08:11,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 01:08:11,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:08:11,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:08:11,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 01:08:11,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:11,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:08:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:12,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:12,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:08:12,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2021-12-17 01:08:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:12,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2021-12-17 01:08:12,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2021-12-17 01:08:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:08:12,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:15,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605441732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:15,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:08:15,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2021-12-17 01:08:15,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300845231] [2021-12-17 01:08:15,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:08:15,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 01:08:15,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:15,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 01:08:15,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1856, Unknown=1, NotChecked=0, Total=2070 [2021-12-17 01:08:15,029 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 01:08:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:16,272 INFO L93 Difference]: Finished difference Result 137 states and 177 transitions. [2021-12-17 01:08:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 01:08:16,272 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2021-12-17 01:08:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:16,273 INFO L225 Difference]: With dead ends: 137 [2021-12-17 01:08:16,273 INFO L226 Difference]: Without dead ends: 133 [2021-12-17 01:08:16,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=519, Invalid=3512, Unknown=1, NotChecked=0, Total=4032 [2021-12-17 01:08:16,274 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:16,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 378 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 792 Invalid, 0 Unknown, 173 Unchecked, 0.4s Time] [2021-12-17 01:08:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-17 01:08:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 66. [2021-12-17 01:08:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 01:08:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2021-12-17 01:08:16,280 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 50 [2021-12-17 01:08:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:16,281 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2021-12-17 01:08:16,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 01:08:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2021-12-17 01:08:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 01:08:16,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:16,282 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:16,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 01:08:16,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 01:08:16,495 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:16,496 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2021-12-17 01:08:16,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:16,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426442188] [2021-12-17 01:08:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:16,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:16,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:08:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:16,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:08:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:16,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:08:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:16,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:08:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 01:08:16,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:16,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426442188] [2021-12-17 01:08:16,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426442188] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:16,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570944555] [2021-12-17 01:08:16,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:08:16,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:16,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:16,577 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:08:16,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 01:08:16,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 01:08:16,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:08:16,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 01:08:16,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 01:08:16,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 01:08:16,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570944555] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:08:16,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:08:16,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-17 01:08:16,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590616191] [2021-12-17 01:08:16,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:08:16,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 01:08:16,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:16,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 01:08:16,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 01:08:16,787 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-17 01:08:16,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:16,892 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2021-12-17 01:08:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 01:08:16,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2021-12-17 01:08:16,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:16,893 INFO L225 Difference]: With dead ends: 121 [2021-12-17 01:08:16,894 INFO L226 Difference]: Without dead ends: 85 [2021-12-17 01:08:16,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-17 01:08:16,895 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 100 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:16,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 119 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:08:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-17 01:08:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2021-12-17 01:08:16,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 01:08:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2021-12-17 01:08:16,905 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 52 [2021-12-17 01:08:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:16,905 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2021-12-17 01:08:16,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-17 01:08:16,905 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2021-12-17 01:08:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 01:08:16,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:16,906 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:16,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 01:08:17,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:17,132 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:17,132 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2021-12-17 01:08:17,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:17,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372340044] [2021-12-17 01:08:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:17,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:17,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:08:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:17,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:08:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:17,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:08:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:17,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:08:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:17,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 01:08:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 01:08:17,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:17,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372340044] [2021-12-17 01:08:17,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372340044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:17,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416048085] [2021-12-17 01:08:17,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:08:17,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:17,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:17,228 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:08:17,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 01:08:17,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 01:08:17,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:08:17,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 01:08:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 01:08:17,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 01:08:17,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416048085] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 01:08:17,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 01:08:17,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-17 01:08:17,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214621105] [2021-12-17 01:08:17,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 01:08:17,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 01:08:17,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:17,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 01:08:17,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 01:08:17,495 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-17 01:08:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:17,638 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2021-12-17 01:08:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 01:08:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2021-12-17 01:08:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:17,639 INFO L225 Difference]: With dead ends: 73 [2021-12-17 01:08:17,639 INFO L226 Difference]: Without dead ends: 63 [2021-12-17 01:08:17,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-17 01:08:17,640 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:17,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 138 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 01:08:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-17 01:08:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2021-12-17 01:08:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 01:08:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-17 01:08:17,644 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2021-12-17 01:08:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:17,644 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-17 01:08:17,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-17 01:08:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-17 01:08:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 01:08:17,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:17,645 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:17,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 01:08:17,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 01:08:17,862 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:17,862 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2021-12-17 01:08:17,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:17,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385889950] [2021-12-17 01:08:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:17,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:18,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:08:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:18,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:08:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:18,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:08:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:18,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:08:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:18,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 01:08:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:08:18,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:18,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385889950] [2021-12-17 01:08:18,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385889950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:18,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606869740] [2021-12-17 01:08:18,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:08:18,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:18,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:18,677 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:08:18,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 01:08:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-17 01:08:18,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:18,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:08:19,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:08:19,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2021-12-17 01:08:19,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:08:19,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2021-12-17 01:08:19,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:19,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2021-12-17 01:08:20,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2021-12-17 01:08:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:08:20,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:31,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606869740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:31,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:08:31,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 49 [2021-12-17 01:08:31,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985023633] [2021-12-17 01:08:31,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:08:31,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-17 01:08:31,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:08:31,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-17 01:08:31,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=3575, Unknown=4, NotChecked=0, Total=3906 [2021-12-17 01:08:31,853 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:08:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:08:34,173 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2021-12-17 01:08:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-17 01:08:34,173 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-17 01:08:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:08:34,174 INFO L225 Difference]: With dead ends: 123 [2021-12-17 01:08:34,174 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 01:08:34,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2378 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=787, Invalid=6865, Unknown=4, NotChecked=0, Total=7656 [2021-12-17 01:08:34,176 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 76 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 01:08:34,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 406 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1099 Invalid, 0 Unknown, 82 Unchecked, 0.7s Time] [2021-12-17 01:08:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 01:08:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2021-12-17 01:08:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 81 states have internal predecessors, (100), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 01:08:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2021-12-17 01:08:34,182 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 64 [2021-12-17 01:08:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:08:34,183 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2021-12-17 01:08:34,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:08:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2021-12-17 01:08:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 01:08:34,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:08:34,184 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:08:34,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 01:08:34,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 01:08:34,401 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:08:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:08:34,401 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2021-12-17 01:08:34,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:08:34,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394554253] [2021-12-17 01:08:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:08:34,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:08:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:35,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:08:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:35,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:08:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:35,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:08:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:35,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:08:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:35,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 01:08:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:08:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:08:35,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:08:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394554253] [2021-12-17 01:08:35,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394554253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:08:35,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445852336] [2021-12-17 01:08:35,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:08:35,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:08:35,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:08:35,296 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:08:35,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 01:08:35,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 01:08:35,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:08:35,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-17 01:08:35,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:08:35,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:08:36,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:08:36,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2021-12-17 01:08:36,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2021-12-17 01:08:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:36,499 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-12-17 01:08:36,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 103 [2021-12-17 01:08:37,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:37,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:08:37,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:08:37,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 01:08:37,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 70 [2021-12-17 01:08:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:08:38,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:08:40,976 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 1) |c_ULTIMATE.start_main_~N~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int) (v_ArrVal_260 Int)) (let ((.cse1 (* |ULTIMATE.start_main_~i~0#1| 4))) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) |c_ULTIMATE.start_main_~N~0#1|) (<= 0 (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~#b~0#1.offset|) v_ArrVal_260))) (+ |c_ULTIMATE.start_main_~k~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) |v_ULTIMATE.start_main_~i~0#1_143| (select .cse0 (+ (* |v_ULTIMATE.start_main_~i~0#1_143| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|)) (select .cse0 |c_ULTIMATE.start_main_~#b~0#1.offset|) 1))) (< (+ |c_ULTIMATE.start_main_~j~0#1| v_ArrVal_260) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~#a~0#1.offset|))) (<= |c_ULTIMATE.start_main_~N~0#1| |v_ULTIMATE.start_main_~i~0#1_143|)))) (<= |c_ULTIMATE.start_main_~N~0#1| |ULTIMATE.start_main_~i~0#1|))) is different from false [2021-12-17 01:09:31,134 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_258 Int) (|v_ULTIMATE.start_main_~i~0#1_148| Int) (|v_ULTIMATE.start_main_~i~0#1_143| Int) (v_ArrVal_260 Int)) (let ((.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~#b~0#1.offset| 4) v_ArrVal_258)) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_148| 4))) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) |c_ULTIMATE.start_main_~N~0#1|) (<= |c_ULTIMATE.start_main_~N~0#1| |v_ULTIMATE.start_main_~i~0#1_148|) (< (+ |c_ULTIMATE.start_main_~j~0#1| v_ArrVal_260) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| .cse0) |c_ULTIMATE.start_main_~#a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~#a~0#1.offset|))) (< (+ |v_ULTIMATE.start_main_~i~0#1_148| 1) |c_ULTIMATE.start_main_~N~0#1|) (<= 0 (let ((.cse2 (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#b~0#1.offset|) v_ArrVal_260))) (+ (select .cse2 (+ (* |v_ULTIMATE.start_main_~i~0#1_143| 4) |c_ULTIMATE.start_main_~#b~0#1.offset|)) |c_ULTIMATE.start_main_~k~0#1| |v_ULTIMATE.start_main_~i~0#1_143| (select .cse2 |c_ULTIMATE.start_main_~#b~0#1.offset|) (select .cse2 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) 1))) (< (+ v_ArrVal_258 |c_ULTIMATE.start_main_~j~0#1|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~#a~0#1.offset| 4))) (<= |c_ULTIMATE.start_main_~N~0#1| |v_ULTIMATE.start_main_~i~0#1_143|))))) is different from false [2021-12-17 01:10:48,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445852336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:10:48,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:10:48,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 54 [2021-12-17 01:10:48,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343260052] [2021-12-17 01:10:48,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:10:48,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 01:10:48,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:10:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 01:10:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=4341, Unknown=41, NotChecked=274, Total=5112 [2021-12-17 01:10:48,247 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 54 states, 54 states have (on average 1.5) internal successors, (81), 54 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:10:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:10:50,836 INFO L93 Difference]: Finished difference Result 148 states and 185 transitions. [2021-12-17 01:10:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-17 01:10:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5) internal successors, (81), 54 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-17 01:10:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:10:50,839 INFO L225 Difference]: With dead ends: 148 [2021-12-17 01:10:50,839 INFO L226 Difference]: Without dead ends: 144 [2021-12-17 01:10:50,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 131.9s TimeCoverageRelationStatistics Valid=904, Invalid=8183, Unknown=41, NotChecked=378, Total=9506 [2021-12-17 01:10:50,842 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 72 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 01:10:50,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 484 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 812 Invalid, 0 Unknown, 319 Unchecked, 0.5s Time] [2021-12-17 01:10:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-17 01:10:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-12-17 01:10:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.247191011235955) internal successors, (111), 89 states have internal predecessors, (111), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:10:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2021-12-17 01:10:50,856 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 64 [2021-12-17 01:10:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:10:50,856 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2021-12-17 01:10:50,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5) internal successors, (81), 54 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:10:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2021-12-17 01:10:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 01:10:50,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:10:50,858 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:10:50,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 01:10:51,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 01:10:51,084 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:10:51,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:10:51,084 INFO L85 PathProgramCache]: Analyzing trace with hash -230931721, now seen corresponding path program 4 times [2021-12-17 01:10:51,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:10:51,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890453488] [2021-12-17 01:10:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:10:51,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:10:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:10:51,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:10:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:10:51,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:10:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:10:51,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:10:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:10:51,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:10:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:10:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 01:10:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:10:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:10:52,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:10:52,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890453488] [2021-12-17 01:10:52,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890453488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:10:52,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258227174] [2021-12-17 01:10:52,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 01:10:52,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:10:52,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:10:52,028 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:10:52,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 01:10:52,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 01:10:52,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:10:52,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 01:10:52,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:10:52,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:10:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:52,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:52,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:10:52,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2021-12-17 01:10:52,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:52,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:10:52,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:52,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:52,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:52,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 75 [2021-12-17 01:10:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:53,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:10:53,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2021-12-17 01:10:53,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2021-12-17 01:10:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:10:53,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:11:05,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258227174] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:11:05,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:11:05,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 48 [2021-12-17 01:11:05,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466667370] [2021-12-17 01:11:05,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:11:05,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-17 01:11:05,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:11:05,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-17 01:11:05,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3468, Unknown=5, NotChecked=0, Total=3782 [2021-12-17 01:11:05,759 INFO L87 Difference]: Start difference. First operand 102 states and 129 transitions. Second operand has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:11:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:11:08,788 INFO L93 Difference]: Finished difference Result 160 states and 201 transitions. [2021-12-17 01:11:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 01:11:08,789 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-17 01:11:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:11:08,790 INFO L225 Difference]: With dead ends: 160 [2021-12-17 01:11:08,790 INFO L226 Difference]: Without dead ends: 156 [2021-12-17 01:11:08,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=746, Invalid=6731, Unknown=5, NotChecked=0, Total=7482 [2021-12-17 01:11:08,797 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 97 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 01:11:08,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 414 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1225 Invalid, 0 Unknown, 277 Unchecked, 0.9s Time] [2021-12-17 01:11:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-17 01:11:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 108. [2021-12-17 01:11:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 94 states have internal predecessors, (118), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 01:11:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2021-12-17 01:11:08,812 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 64 [2021-12-17 01:11:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:11:08,812 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2021-12-17 01:11:08,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:11:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2021-12-17 01:11:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 01:11:08,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:11:08,813 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:11:08,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 01:11:09,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 01:11:09,031 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:11:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:11:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash -12077003, now seen corresponding path program 5 times [2021-12-17 01:11:09,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:11:09,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642359606] [2021-12-17 01:11:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:11:09,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:11:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:10,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:11:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:10,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:11:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:10,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:11:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:10,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:11:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:10,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 01:11:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:11:10,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:11:10,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642359606] [2021-12-17 01:11:10,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642359606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:11:10,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704579764] [2021-12-17 01:11:10,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 01:11:10,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:11:10,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:11:10,064 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:11:10,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 01:11:10,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 01:11:10,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:11:10,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-17 01:11:10,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:11:10,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:11:10,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:10,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:10,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:10,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:10,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:10,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:11:10,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-12-17 01:11:11,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:11,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:11:11,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:11,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:11,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:11,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2021-12-17 01:11:11,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:11,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:11,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:11,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2021-12-17 01:11:12,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2021-12-17 01:11:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:11:12,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:11:28,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704579764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:11:28,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:11:28,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 48 [2021-12-17 01:11:28,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32839168] [2021-12-17 01:11:28,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:11:28,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-17 01:11:28,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:11:28,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-17 01:11:28,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3474, Unknown=6, NotChecked=0, Total=3782 [2021-12-17 01:11:28,830 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:11:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:11:32,011 INFO L93 Difference]: Finished difference Result 160 states and 201 transitions. [2021-12-17 01:11:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 01:11:32,012 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-17 01:11:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:11:32,013 INFO L225 Difference]: With dead ends: 160 [2021-12-17 01:11:32,013 INFO L226 Difference]: Without dead ends: 156 [2021-12-17 01:11:32,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=766, Invalid=6884, Unknown=6, NotChecked=0, Total=7656 [2021-12-17 01:11:32,014 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 01:11:32,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 416 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1164 Invalid, 0 Unknown, 145 Unchecked, 0.8s Time] [2021-12-17 01:11:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-17 01:11:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 108. [2021-12-17 01:11:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 94 states have internal predecessors, (118), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 01:11:32,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2021-12-17 01:11:32,025 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 64 [2021-12-17 01:11:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:11:32,025 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2021-12-17 01:11:32,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:11:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2021-12-17 01:11:32,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 01:11:32,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:11:32,026 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:11:32,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 01:11:32,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:11:32,244 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:11:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:11:32,244 INFO L85 PathProgramCache]: Analyzing trace with hash -257544841, now seen corresponding path program 6 times [2021-12-17 01:11:32,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:11:32,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967632299] [2021-12-17 01:11:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:11:32,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:11:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:33,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:11:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:33,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:11:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:11:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:33,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:11:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:33,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 01:11:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:11:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:11:33,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:11:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967632299] [2021-12-17 01:11:33,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967632299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:11:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222008017] [2021-12-17 01:11:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 01:11:33,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:11:33,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:11:33,197 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:11:33,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 01:11:33,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 01:11:33,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:11:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 01:11:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:11:33,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:11:43,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:43,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:11:43,825 INFO L354 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2021-12-17 01:11:43,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 60 [2021-12-17 01:11:44,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:44,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:44,057 INFO L354 Elim1Store]: treesize reduction 83, result has 7.8 percent of original size [2021-12-17 01:11:44,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 79 [2021-12-17 01:11:44,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:44,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:44,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:44,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:44,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:44,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:44,288 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-12-17 01:11:44,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 92 [2021-12-17 01:11:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:45,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:45,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:11:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:45,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:11:45,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:11:45,365 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-17 01:11:45,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 27 [2021-12-17 01:11:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:11:45,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:11:50,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222008017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:11:50,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:11:50,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2021-12-17 01:11:50,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160474710] [2021-12-17 01:11:50,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:11:50,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-17 01:11:50,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:11:50,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-17 01:11:50,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=4764, Unknown=7, NotChecked=0, Total=5256 [2021-12-17 01:11:50,259 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:11:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:11:59,755 INFO L93 Difference]: Finished difference Result 197 states and 250 transitions. [2021-12-17 01:11:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 01:11:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-17 01:11:59,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:11:59,756 INFO L225 Difference]: With dead ends: 197 [2021-12-17 01:11:59,756 INFO L226 Difference]: Without dead ends: 193 [2021-12-17 01:11:59,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3045 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=907, Invalid=8784, Unknown=11, NotChecked=0, Total=9702 [2021-12-17 01:11:59,757 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 01:11:59,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 416 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 580 Invalid, 0 Unknown, 182 Unchecked, 0.4s Time] [2021-12-17 01:11:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-17 01:11:59,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 132. [2021-12-17 01:11:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 114 states have internal predecessors, (147), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 01:11:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 173 transitions. [2021-12-17 01:11:59,769 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 173 transitions. Word has length 64 [2021-12-17 01:11:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:11:59,770 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 173 transitions. [2021-12-17 01:11:59,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 55 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:11:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 173 transitions. [2021-12-17 01:11:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 01:11:59,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:11:59,771 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:11:59,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 01:11:59,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 01:11:59,989 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:11:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:11:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash -38690123, now seen corresponding path program 7 times [2021-12-17 01:11:59,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:11:59,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179802447] [2021-12-17 01:11:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:11:59,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:12:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:01,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:12:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:01,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:12:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:01,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:12:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:01,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:12:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:01,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 01:12:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:12:01,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:12:01,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179802447] [2021-12-17 01:12:01,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179802447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:12:01,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809816046] [2021-12-17 01:12:01,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 01:12:01,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:12:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:12:01,244 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:12:01,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 01:12:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:01,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-17 01:12:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:12:01,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:12:02,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:12:02,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 01:12:02,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:12:02,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2021-12-17 01:12:02,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:02,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 73 [2021-12-17 01:12:03,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 37 [2021-12-17 01:12:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 01:12:03,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:12:18,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809816046] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:12:18,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:12:18,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 53 [2021-12-17 01:12:18,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954580233] [2021-12-17 01:12:18,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:12:18,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-17 01:12:18,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:12:18,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-17 01:12:18,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=4094, Unknown=6, NotChecked=0, Total=4422 [2021-12-17 01:12:18,416 INFO L87 Difference]: Start difference. First operand 132 states and 173 transitions. Second operand has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 53 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:12:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:12:22,490 INFO L93 Difference]: Finished difference Result 228 states and 286 transitions. [2021-12-17 01:12:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 01:12:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 53 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-17 01:12:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:12:22,491 INFO L225 Difference]: With dead ends: 228 [2021-12-17 01:12:22,491 INFO L226 Difference]: Without dead ends: 224 [2021-12-17 01:12:22,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3151 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=806, Invalid=9694, Unknown=6, NotChecked=0, Total=10506 [2021-12-17 01:12:22,492 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 78 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 01:12:22,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 486 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1219 Invalid, 0 Unknown, 222 Unchecked, 0.8s Time] [2021-12-17 01:12:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-17 01:12:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 138. [2021-12-17 01:12:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 118 states have (on average 1.2881355932203389) internal successors, (152), 119 states have internal predecessors, (152), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 01:12:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2021-12-17 01:12:22,506 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 64 [2021-12-17 01:12:22,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:12:22,506 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2021-12-17 01:12:22,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 53 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:12:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2021-12-17 01:12:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 01:12:22,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:12:22,509 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:12:22,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-17 01:12:22,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 01:12:22,710 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:12:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:12:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash 17214773, now seen corresponding path program 8 times [2021-12-17 01:12:22,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:12:22,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051186582] [2021-12-17 01:12:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:12:22,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:12:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:23,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:12:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:23,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:12:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:23,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:12:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:23,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:12:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:23,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 01:12:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:12:23,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:12:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051186582] [2021-12-17 01:12:23,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051186582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:12:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463034783] [2021-12-17 01:12:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 01:12:23,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:12:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:12:23,656 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:12:23,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 01:12:23,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 01:12:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:12:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-17 01:12:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:12:23,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:12:24,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:12:24,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2021-12-17 01:12:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:12:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 75 [2021-12-17 01:12:24,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:24,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2021-12-17 01:12:25,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2021-12-17 01:12:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:12:25,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 01:12:43,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463034783] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:12:43,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 01:12:43,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-12-17 01:12:43,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051304902] [2021-12-17 01:12:43,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 01:12:43,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 01:12:43,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 01:12:43,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 01:12:43,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=3710, Unknown=8, NotChecked=0, Total=4032 [2021-12-17 01:12:43,547 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 50 states, 50 states have (on average 1.52) internal successors, (76), 50 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:12:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 01:12:46,858 INFO L93 Difference]: Finished difference Result 232 states and 295 transitions. [2021-12-17 01:12:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 01:12:46,858 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 50 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2021-12-17 01:12:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 01:12:46,864 INFO L225 Difference]: With dead ends: 232 [2021-12-17 01:12:46,864 INFO L226 Difference]: Without dead ends: 228 [2021-12-17 01:12:46,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=817, Invalid=7547, Unknown=8, NotChecked=0, Total=8372 [2021-12-17 01:12:46,883 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 64 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 01:12:46,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 455 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1375 Invalid, 0 Unknown, 265 Unchecked, 0.9s Time] [2021-12-17 01:12:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-17 01:12:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 146. [2021-12-17 01:12:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 126 states have (on average 1.2777777777777777) internal successors, (161), 127 states have internal predecessors, (161), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 01:12:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2021-12-17 01:12:46,908 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 64 [2021-12-17 01:12:46,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 01:12:46,908 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2021-12-17 01:12:46,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 50 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 01:12:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2021-12-17 01:12:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 01:12:46,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 01:12:46,915 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 01:12:46,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 01:12:47,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:12:47,132 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 01:12:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 01:12:47,133 INFO L85 PathProgramCache]: Analyzing trace with hash 236069491, now seen corresponding path program 3 times [2021-12-17 01:12:47,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 01:12:47,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119864083] [2021-12-17 01:12:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 01:12:47,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 01:12:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:47,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 01:12:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:47,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 01:12:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:47,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 01:12:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:47,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 01:12:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:47,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 01:12:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 01:12:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 01:12:47,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 01:12:47,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119864083] [2021-12-17 01:12:47,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119864083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 01:12:47,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147113437] [2021-12-17 01:12:47,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 01:12:47,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 01:12:47,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 01:12:47,869 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 01:12:47,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 01:12:47,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 01:12:47,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 01:12:47,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 01:12:47,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 01:12:47,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-17 01:12:48,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:48,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:48,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:48,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:48,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:12:48,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 57 [2021-12-17 01:12:49,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:49,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:49,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:49,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:49,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2021-12-17 01:12:49,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:49,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:49,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:49,212 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-12-17 01:12:49,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 113 [2021-12-17 01:12:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:50,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 01:12:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 01:12:50,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 01:12:50,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 80 Killed by 15