./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-crafted/zero_sum_const1.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 be1a0182ecf6c8aa754e6086345670fff3439e7c706169309311fcaa402caa1e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:31:40,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:31:40,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:31:40,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:31:40,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:31:40,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:31:40,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:31:40,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:31:40,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:31:40,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:31:40,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:31:40,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:31:40,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:31:40,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:31:40,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:31:40,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:31:40,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:31:40,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:31:40,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:31:40,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:31:40,413 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:31:40,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:31:40,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:31:40,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:31:40,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:31:40,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:31:40,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:31:40,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:31:40,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:31:40,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:31:40,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:31:40,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:31:40,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:31:40,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:31:40,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:31:40,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:31:40,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:31:40,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:31:40,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:31:40,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:31:40,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:31:40,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:31:40,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:31:40,473 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:31:40,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:31:40,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:31:40,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:31:40,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:31:40,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:31:40,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:31:40,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:31:40,476 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:31:40,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:31:40,477 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:31:40,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:31:40,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:31:40,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:31:40,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:31:40,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:31:40,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:31:40,479 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:31:40,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:31:40,480 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:31:40,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:31:40,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:31:40,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:31:40,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:31:40,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:31:40,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:31:40,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:31:40,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:31:40,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:31:40,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:31:40,483 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:31:40,483 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:31:40,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:31:40,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be1a0182ecf6c8aa754e6086345670fff3439e7c706169309311fcaa402caa1e [2022-07-20 21:31:40,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:31:40,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:31:40,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:31:40,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:31:40,763 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:31:40,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const1.c [2022-07-20 21:31:40,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2f71087d/8413b9bc91c74e4ebe9f153747ac97bb/FLAG8987fbdb2 [2022-07-20 21:31:41,268 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:31:41,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const1.c [2022-07-20 21:31:41,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2f71087d/8413b9bc91c74e4ebe9f153747ac97bb/FLAG8987fbdb2 [2022-07-20 21:31:41,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2f71087d/8413b9bc91c74e4ebe9f153747ac97bb [2022-07-20 21:31:41,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:31:41,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:31:41,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:31:41,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:31:41,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:31:41,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e7e705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41, skipping insertion in model container [2022-07-20 21:31:41,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:31:41,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:31:41,817 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-crafted/zero_sum_const1.c[406,419] [2022-07-20 21:31:41,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:31:41,837 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:31:41,847 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-crafted/zero_sum_const1.c[406,419] [2022-07-20 21:31:41,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:31:41,862 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:31:41,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41 WrapperNode [2022-07-20 21:31:41,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:31:41,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:31:41,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:31:41,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:31:41,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,889 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2022-07-20 21:31:41,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:31:41,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:31:41,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:31:41,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:31:41,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:31:41,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:31:41,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:31:41,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:31:41,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (1/1) ... [2022-07-20 21:31:41,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:31:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:41,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 21:31:41,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 21:31:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:31:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:31:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:31:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 21:31:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:31:41,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:31:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:31:42,050 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:31:42,052 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:31:42,214 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:31:42,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:31:42,219 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 21:31:42,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:31:42 BoogieIcfgContainer [2022-07-20 21:31:42,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:31:42,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:31:42,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:31:42,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:31:42,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:31:41" (1/3) ... [2022-07-20 21:31:42,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436e0e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:31:42, skipping insertion in model container [2022-07-20 21:31:42,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:31:41" (2/3) ... [2022-07-20 21:31:42,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436e0e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:31:42, skipping insertion in model container [2022-07-20 21:31:42,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:31:42" (3/3) ... [2022-07-20 21:31:42,240 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2022-07-20 21:31:42,253 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:31:42,267 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:31:42,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:31:42,350 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6b2f5722, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@73418818 [2022-07-20 21:31:42,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:31:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:31:42,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:42,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:42,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:42,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:42,382 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2022-07-20 21:31:42,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:42,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076627922] [2022-07-20 21:31:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:42,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:31:42,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:42,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076627922] [2022-07-20 21:31:42,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076627922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:31:42,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:31:42,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:31:42,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365593201] [2022-07-20 21:31:42,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:31:42,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:31:42,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:42,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:31:42,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:31:42,572 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:42,587 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-07-20 21:31:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:31:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 21:31:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:42,595 INFO L225 Difference]: With dead ends: 35 [2022-07-20 21:31:42,596 INFO L226 Difference]: Without dead ends: 15 [2022-07-20 21:31:42,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:31:42,608 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:42,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:31:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-20 21:31:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-20 21:31:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-20 21:31:42,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-07-20 21:31:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:42,682 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-20 21:31:42,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-20 21:31:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:31:42,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:42,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:42,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:31:42,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:42,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:42,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2022-07-20 21:31:42,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:42,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063390232] [2022-07-20 21:31:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:42,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:31:42,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:42,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063390232] [2022-07-20 21:31:42,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063390232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:31:42,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:31:42,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:31:42,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921958109] [2022-07-20 21:31:42,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:31:42,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:31:42,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:42,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:31:42,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:31:42,747 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:42,779 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-07-20 21:31:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:31:42,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 21:31:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:42,781 INFO L225 Difference]: With dead ends: 27 [2022-07-20 21:31:42,781 INFO L226 Difference]: Without dead ends: 17 [2022-07-20 21:31:42,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:31:42,786 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:42,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:31:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-20 21:31:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-07-20 21:31:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-20 21:31:42,796 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2022-07-20 21:31:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:42,798 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-20 21:31:42,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-20 21:31:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 21:31:42,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:42,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:42,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:31:42,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:42,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2117745282, now seen corresponding path program 1 times [2022-07-20 21:31:42,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:42,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983785745] [2022-07-20 21:31:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:42,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:31:42,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:42,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983785745] [2022-07-20 21:31:42,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983785745] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:31:42,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:31:42,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:31:42,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835642513] [2022-07-20 21:31:42,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:31:42,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:31:42,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:31:42,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:31:42,896 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:42,947 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-07-20 21:31:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:31:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 21:31:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:42,948 INFO L225 Difference]: With dead ends: 28 [2022-07-20 21:31:42,949 INFO L226 Difference]: Without dead ends: 21 [2022-07-20 21:31:42,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:31:42,950 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:42,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:31:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-20 21:31:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-07-20 21:31:42,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:42,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-07-20 21:31:42,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-07-20 21:31:42,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:42,955 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-07-20 21:31:42,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-07-20 21:31:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 21:31:42,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:42,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:42,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 21:31:42,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:42,957 INFO L85 PathProgramCache]: Analyzing trace with hash -350467326, now seen corresponding path program 1 times [2022-07-20 21:31:42,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:42,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236865932] [2022-07-20 21:31:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:42,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 21:31:43,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:43,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236865932] [2022-07-20 21:31:43,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236865932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:43,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979589017] [2022-07-20 21:31:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:43,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:43,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:43,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:43,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:31:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:31:43,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 21:31:43,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 21:31:43,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979589017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:43,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:43,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 21:31:43,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405039773] [2022-07-20 21:31:43,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:43,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 21:31:43,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 21:31:43,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:31:43,200 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:43,257 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-07-20 21:31:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 21:31:43,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-20 21:31:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:43,260 INFO L225 Difference]: With dead ends: 33 [2022-07-20 21:31:43,261 INFO L226 Difference]: Without dead ends: 21 [2022-07-20 21:31:43,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:31:43,262 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:43,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:31:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-20 21:31:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-07-20 21:31:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-20 21:31:43,267 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-07-20 21:31:43,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:43,267 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-20 21:31:43,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:43,268 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-20 21:31:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 21:31:43,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:43,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:43,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:31:43,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:43,494 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:43,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:43,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924836, now seen corresponding path program 2 times [2022-07-20 21:31:43,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:43,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233760144] [2022-07-20 21:31:43,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:43,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 21:31:43,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:43,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233760144] [2022-07-20 21:31:43,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233760144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:43,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436592348] [2022-07-20 21:31:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:31:43,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:43,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:43,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:43,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:31:43,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:31:43,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:43,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:31:43,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 21:31:43,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 21:31:43,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436592348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:43,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:43,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-20 21:31:43,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915838553] [2022-07-20 21:31:43,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:43,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:31:43,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:31:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:31:43,724 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:43,776 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-07-20 21:31:43,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 21:31:43,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-20 21:31:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:43,777 INFO L225 Difference]: With dead ends: 35 [2022-07-20 21:31:43,777 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 21:31:43,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:31:43,779 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:43,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:31:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 21:31:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-07-20 21:31:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-07-20 21:31:43,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2022-07-20 21:31:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:43,789 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-07-20 21:31:43,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-07-20 21:31:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 21:31:43,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:43,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:43,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:31:44,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:44,008 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:44,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 3 times [2022-07-20 21:31:44,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:44,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024166298] [2022-07-20 21:31:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:44,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:31:44,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:44,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024166298] [2022-07-20 21:31:44,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024166298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:44,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301717980] [2022-07-20 21:31:44,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:31:44,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:44,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:44,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:44,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:31:44,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:31:44,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:44,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 21:31:44,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:45,235 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:31:45,237 INFO L390 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 [2022-07-20 21:31:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:31:45,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:46,319 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:31:46,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 93 [2022-07-20 21:31:46,726 INFO L356 Elim1Store]: treesize reduction 40, result has 52.9 percent of original size [2022-07-20 21:31:46,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 54 [2022-07-20 21:31:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:31:47,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301717980] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:47,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:47,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 47 [2022-07-20 21:31:47,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425639627] [2022-07-20 21:31:47,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:47,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 21:31:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 21:31:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 21:31:47,259 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:48,757 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-07-20 21:31:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 21:31:48,758 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-20 21:31:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:48,760 INFO L225 Difference]: With dead ends: 54 [2022-07-20 21:31:48,760 INFO L226 Difference]: Without dead ends: 48 [2022-07-20 21:31:48,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=649, Invalid=4901, Unknown=0, NotChecked=0, Total=5550 [2022-07-20 21:31:48,763 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:48,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 65 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 291 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-07-20 21:31:48,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-20 21:31:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2022-07-20 21:31:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-07-20 21:31:48,770 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2022-07-20 21:31:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:48,770 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-07-20 21:31:48,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-07-20 21:31:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 21:31:48,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:48,772 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:48,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:31:48,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:48,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash -732186678, now seen corresponding path program 4 times [2022-07-20 21:31:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:48,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306415725] [2022-07-20 21:31:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:48,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:31:49,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:49,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306415725] [2022-07-20 21:31:49,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306415725] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:49,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727791192] [2022-07-20 21:31:49,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:31:49,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:49,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:49,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:49,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:31:49,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:31:49,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:49,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:31:49,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:31:49,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:31:49,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727791192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:49,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:49,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-20 21:31:49,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108416083] [2022-07-20 21:31:49,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:49,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:31:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:31:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:31:49,189 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:49,335 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-07-20 21:31:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 21:31:49,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-20 21:31:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:49,336 INFO L225 Difference]: With dead ends: 62 [2022-07-20 21:31:49,336 INFO L226 Difference]: Without dead ends: 37 [2022-07-20 21:31:49,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:31:49,337 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:49,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 27 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:31:49,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-20 21:31:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-07-20 21:31:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-07-20 21:31:49,343 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2022-07-20 21:31:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:49,343 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-07-20 21:31:49,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-07-20 21:31:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 21:31:49,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:49,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:49,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:31:49,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:49,567 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1031419092, now seen corresponding path program 5 times [2022-07-20 21:31:49,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:49,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4908638] [2022-07-20 21:31:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:49,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:31:49,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:49,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4908638] [2022-07-20 21:31:49,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4908638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:49,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819751200] [2022-07-20 21:31:49,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:31:49,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:49,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:49,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:49,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:31:49,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 21:31:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 21:31:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:31:49,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:31:49,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819751200] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:49,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:49,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-20 21:31:49,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509906147] [2022-07-20 21:31:49,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:49,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:31:49,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:49,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:31:49,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:31:49,821 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:49,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:49,952 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-07-20 21:31:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 21:31:49,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 21:31:49,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:49,954 INFO L225 Difference]: With dead ends: 36 [2022-07-20 21:31:49,954 INFO L226 Difference]: Without dead ends: 32 [2022-07-20 21:31:49,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:31:49,955 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:49,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 23 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:31:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-20 21:31:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-20 21:31:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-07-20 21:31:49,960 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2022-07-20 21:31:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:49,961 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-07-20 21:31:49,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:49,961 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-07-20 21:31:49,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 21:31:49,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:49,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:49,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:31:50,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:50,163 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:50,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:50,163 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 6 times [2022-07-20 21:31:50,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:50,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163028086] [2022-07-20 21:31:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:50,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:31:50,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:50,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163028086] [2022-07-20 21:31:50,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163028086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:50,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054095356] [2022-07-20 21:31:50,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:31:50,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:50,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:50,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:50,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:31:50,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-20 21:31:50,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:50,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:31:50,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:51,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2022-07-20 21:31:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:31:51,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:51,901 INFO L356 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2022-07-20 21:31:51,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-07-20 21:31:52,175 INFO L356 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2022-07-20 21:31:52,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-07-20 21:31:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:31:52,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054095356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:52,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:52,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 15] total 45 [2022-07-20 21:31:52,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970533121] [2022-07-20 21:31:52,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:52,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 21:31:52,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:52,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 21:31:52,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 21:31:52,226 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:53,193 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-07-20 21:31:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:31:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-20 21:31:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:53,194 INFO L225 Difference]: With dead ends: 47 [2022-07-20 21:31:53,194 INFO L226 Difference]: Without dead ends: 43 [2022-07-20 21:31:53,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=245, Invalid=3061, Unknown=0, NotChecked=0, Total=3306 [2022-07-20 21:31:53,196 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:53,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 77 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 21:31:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-20 21:31:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-07-20 21:31:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-07-20 21:31:53,203 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2022-07-20 21:31:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:53,204 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-07-20 21:31:53,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-07-20 21:31:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 21:31:53,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:53,205 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:53,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-20 21:31:53,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:53,416 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:53,417 INFO L85 PathProgramCache]: Analyzing trace with hash 326484464, now seen corresponding path program 7 times [2022-07-20 21:31:53,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:53,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679357314] [2022-07-20 21:31:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:53,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:31:53,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679357314] [2022-07-20 21:31:53,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679357314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300453502] [2022-07-20 21:31:53,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:31:53,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:53,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:53,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:53,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:31:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:53,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:31:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:31:53,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:31:53,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300453502] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:53,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:53,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-20 21:31:53,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650707916] [2022-07-20 21:31:53,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:53,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:31:53,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:53,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:31:53,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:31:53,696 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:53,832 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-07-20 21:31:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:31:53,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-20 21:31:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:53,833 INFO L225 Difference]: With dead ends: 74 [2022-07-20 21:31:53,833 INFO L226 Difference]: Without dead ends: 43 [2022-07-20 21:31:53,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-20 21:31:53,835 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:53,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 23 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:31:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-20 21:31:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2022-07-20 21:31:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-07-20 21:31:53,841 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2022-07-20 21:31:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:53,842 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-07-20 21:31:53,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-07-20 21:31:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 21:31:53,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:53,843 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:53,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:31:54,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:54,048 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1551752238, now seen corresponding path program 8 times [2022-07-20 21:31:54,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:54,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477569101] [2022-07-20 21:31:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:31:54,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477569101] [2022-07-20 21:31:54,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477569101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:54,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648115270] [2022-07-20 21:31:54,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:31:54,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:54,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:54,128 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:54,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:31:54,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:31:54,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:54,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 21:31:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:31:54,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:31:54,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648115270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:54,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:54,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-20 21:31:54,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545090303] [2022-07-20 21:31:54,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:54,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 21:31:54,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:54,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 21:31:54,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-20 21:31:54,324 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:54,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:31:54,474 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-07-20 21:31:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:31:54,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-20 21:31:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:31:54,475 INFO L225 Difference]: With dead ends: 42 [2022-07-20 21:31:54,475 INFO L226 Difference]: Without dead ends: 38 [2022-07-20 21:31:54,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-07-20 21:31:54,476 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 63 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:31:54,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 18 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:31:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-20 21:31:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-07-20 21:31:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-07-20 21:31:54,482 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2022-07-20 21:31:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:31:54,483 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-07-20 21:31:54,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:31:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-07-20 21:31:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 21:31:54,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:31:54,484 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:31:54,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:31:54,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 21:31:54,699 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:31:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:31:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash -827015692, now seen corresponding path program 9 times [2022-07-20 21:31:54,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:31:54,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134126121] [2022-07-20 21:31:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:31:54,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:31:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:31:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:31:55,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:31:55,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134126121] [2022-07-20 21:31:55,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134126121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:31:55,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180483136] [2022-07-20 21:31:55,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:31:55,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:31:55,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:31:55,569 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:31:55,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:31:55,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 21:31:55,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:31:55,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-20 21:31:55,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:31:55,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:31:56,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:56,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:56,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:56,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:31:56,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:31:56,951 INFO L356 Elim1Store]: treesize reduction 16, result has 72.4 percent of original size [2022-07-20 21:31:56,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 55 [2022-07-20 21:31:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:31:57,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:31:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:31:59,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180483136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:31:59,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:31:59,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 21] total 66 [2022-07-20 21:31:59,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105605402] [2022-07-20 21:31:59,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:31:59,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-20 21:31:59,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:31:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-20 21:31:59,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=3980, Unknown=0, NotChecked=0, Total=4290 [2022-07-20 21:31:59,453 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:01,720 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-07-20 21:32:01,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-20 21:32:01,720 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-20 21:32:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:01,721 INFO L225 Difference]: With dead ends: 74 [2022-07-20 21:32:01,721 INFO L226 Difference]: Without dead ends: 70 [2022-07-20 21:32:01,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=710, Invalid=8796, Unknown=0, NotChecked=0, Total=9506 [2022-07-20 21:32:01,724 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:01,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 102 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 181 Invalid, 0 Unknown, 300 Unchecked, 0.1s Time] [2022-07-20 21:32:01,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-20 21:32:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2022-07-20 21:32:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-07-20 21:32:01,733 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2022-07-20 21:32:01,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:01,733 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-07-20 21:32:01,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:01,734 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-07-20 21:32:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 21:32:01,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:01,734 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:01,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-20 21:32:01,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:01,939 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash -139896938, now seen corresponding path program 10 times [2022-07-20 21:32:01,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:01,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388625974] [2022-07-20 21:32:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:01,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:32:02,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388625974] [2022-07-20 21:32:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388625974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:02,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537691067] [2022-07-20 21:32:02,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:32:02,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:02,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:02,048 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) [2022-07-20 21:32:02,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:32:02,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:32:02,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:32:02,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:32:02,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:32:02,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537691067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:02,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:02,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-20 21:32:02,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606447787] [2022-07-20 21:32:02,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:02,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:32:02,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:32:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:32:02,269 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:02,393 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-07-20 21:32:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:32:02,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-20 21:32:02,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:02,394 INFO L225 Difference]: With dead ends: 86 [2022-07-20 21:32:02,394 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 21:32:02,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-20 21:32:02,395 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 84 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:02,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 36 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:32:02,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 21:32:02,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-07-20 21:32:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-07-20 21:32:02,404 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2022-07-20 21:32:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:02,404 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-07-20 21:32:02,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-07-20 21:32:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:32:02,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:02,405 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:02,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:02,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 21:32:02,624 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash 38479864, now seen corresponding path program 11 times [2022-07-20 21:32:02,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:02,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244730591] [2022-07-20 21:32:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:02,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:32:02,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:02,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244730591] [2022-07-20 21:32:02,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244730591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:02,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103769949] [2022-07-20 21:32:02,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:32:02,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:02,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:02,712 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) [2022-07-20 21:32:02,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:32:02,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-20 21:32:02,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 21:32:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:32:02,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:32:02,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103769949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:02,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:02,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-20 21:32:02,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014898824] [2022-07-20 21:32:02,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:02,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 21:32:02,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 21:32:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:32:02,918 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:03,080 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-07-20 21:32:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:32:03,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-20 21:32:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:03,081 INFO L225 Difference]: With dead ends: 48 [2022-07-20 21:32:03,081 INFO L226 Difference]: Without dead ends: 44 [2022-07-20 21:32:03,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-07-20 21:32:03,082 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 67 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:03,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 25 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:32:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-20 21:32:03,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-07-20 21:32:03,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-07-20 21:32:03,091 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2022-07-20 21:32:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:03,091 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-07-20 21:32:03,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-07-20 21:32:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 21:32:03,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:03,092 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:03,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 21:32:03,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 21:32:03,299 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:03,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1622323046, now seen corresponding path program 12 times [2022-07-20 21:32:03,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:03,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937316505] [2022-07-20 21:32:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:03,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 1 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:32:04,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:04,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937316505] [2022-07-20 21:32:04,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937316505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:04,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948133293] [2022-07-20 21:32:04,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:32:04,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:04,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:04,637 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) [2022-07-20 21:32:04,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:32:04,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 21:32:04,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:04,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-20 21:32:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:04,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:32:05,943 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:32:05,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 41 [2022-07-20 21:32:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:32:06,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:32:09,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948133293] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:09,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:09,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30, 25] total 78 [2022-07-20 21:32:09,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290805516] [2022-07-20 21:32:09,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:09,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-07-20 21:32:09,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-07-20 21:32:09,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=5674, Unknown=0, NotChecked=0, Total=6006 [2022-07-20 21:32:09,917 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:12,649 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-07-20 21:32:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 21:32:12,649 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-20 21:32:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:12,650 INFO L225 Difference]: With dead ends: 61 [2022-07-20 21:32:12,650 INFO L226 Difference]: Without dead ends: 57 [2022-07-20 21:32:12,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2493 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=738, Invalid=11694, Unknown=0, NotChecked=0, Total=12432 [2022-07-20 21:32:12,653 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:12,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 107 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 661 Invalid, 0 Unknown, 550 Unchecked, 0.3s Time] [2022-07-20 21:32:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-20 21:32:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2022-07-20 21:32:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-07-20 21:32:12,665 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2022-07-20 21:32:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:12,666 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-07-20 21:32:12,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-07-20 21:32:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 21:32:12,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:12,667 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:12,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:12,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 21:32:12,882 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:12,882 INFO L85 PathProgramCache]: Analyzing trace with hash 73914556, now seen corresponding path program 13 times [2022-07-20 21:32:12,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:12,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580528978] [2022-07-20 21:32:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:12,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:32:12,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580528978] [2022-07-20 21:32:12,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580528978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693171141] [2022-07-20 21:32:12,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:32:12,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:12,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:12,996 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) [2022-07-20 21:32:12,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:32:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:13,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:32:13,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:32:13,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:32:13,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693171141] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:13,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:13,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-20 21:32:13,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884648719] [2022-07-20 21:32:13,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:13,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:32:13,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:13,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:32:13,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:32:13,249 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:13,427 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2022-07-20 21:32:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:32:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-20 21:32:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:13,428 INFO L225 Difference]: With dead ends: 98 [2022-07-20 21:32:13,428 INFO L226 Difference]: Without dead ends: 55 [2022-07-20 21:32:13,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:32:13,429 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 104 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:13,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 31 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:32:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-20 21:32:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2022-07-20 21:32:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-07-20 21:32:13,440 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2022-07-20 21:32:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:13,441 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-07-20 21:32:13,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-07-20 21:32:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 21:32:13,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:13,442 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:13,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:13,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 21:32:13,664 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:13,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1970943902, now seen corresponding path program 14 times [2022-07-20 21:32:13,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:13,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282640224] [2022-07-20 21:32:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:13,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:32:13,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:13,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282640224] [2022-07-20 21:32:13,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282640224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:13,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971990996] [2022-07-20 21:32:13,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:32:13,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:13,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:13,812 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) [2022-07-20 21:32:13,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:32:13,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:32:13,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:13,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 21:32:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:32:13,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:32:14,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971990996] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:14,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:14,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-20 21:32:14,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437723582] [2022-07-20 21:32:14,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:14,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 21:32:14,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:14,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 21:32:14,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-20 21:32:14,043 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:14,242 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2022-07-20 21:32:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:32:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-20 21:32:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:14,243 INFO L225 Difference]: With dead ends: 54 [2022-07-20 21:32:14,243 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 21:32:14,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:32:14,244 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 109 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:14,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 16 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:32:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 21:32:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-07-20 21:32:14,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-07-20 21:32:14,253 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2022-07-20 21:32:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:14,253 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-07-20 21:32:14,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-07-20 21:32:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 21:32:14,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:14,254 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:14,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-20 21:32:14,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:14,455 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash 49745600, now seen corresponding path program 15 times [2022-07-20 21:32:14,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:14,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131452421] [2022-07-20 21:32:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:14,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:32:16,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:16,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131452421] [2022-07-20 21:32:16,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131452421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:16,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811654660] [2022-07-20 21:32:16,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:32:16,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:16,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:16,079 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) [2022-07-20 21:32:16,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:32:16,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 21:32:16,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:16,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-20 21:32:16,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:16,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:32:17,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:17,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:17,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:17,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:17,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:17,914 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:32:17,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 103 [2022-07-20 21:32:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 7 proven. 92 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 21:32:18,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:32:22,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811654660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:22,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:22,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 33, 29] total 92 [2022-07-20 21:32:22,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320036559] [2022-07-20 21:32:22,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:22,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-20 21:32:22,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-20 21:32:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=7877, Unknown=0, NotChecked=0, Total=8372 [2022-07-20 21:32:22,611 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 92 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 92 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:27,141 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-07-20 21:32:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-20 21:32:27,141 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 92 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-20 21:32:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:27,142 INFO L225 Difference]: With dead ends: 70 [2022-07-20 21:32:27,142 INFO L226 Difference]: Without dead ends: 66 [2022-07-20 21:32:27,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3455 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1115, Invalid=17245, Unknown=0, NotChecked=0, Total=18360 [2022-07-20 21:32:27,144 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 857 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:27,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 119 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 906 Invalid, 0 Unknown, 857 Unchecked, 0.5s Time] [2022-07-20 21:32:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-20 21:32:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2022-07-20 21:32:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-07-20 21:32:27,159 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2022-07-20 21:32:27,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:27,159 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-07-20 21:32:27,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 92 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-07-20 21:32:27,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 21:32:27,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:27,160 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:27,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:27,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 21:32:27,371 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash 614114658, now seen corresponding path program 16 times [2022-07-20 21:32:27,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:27,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048228931] [2022-07-20 21:32:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:27,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:32:27,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:27,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048228931] [2022-07-20 21:32:27,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048228931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:27,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017987370] [2022-07-20 21:32:27,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:32:27,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:27,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:27,512 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) [2022-07-20 21:32:27,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 21:32:27,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:32:27,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:27,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:32:27,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:32:27,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:32:27,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017987370] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:27,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:27,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-20 21:32:27,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127925377] [2022-07-20 21:32:27,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:32:27,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:32:27,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:32:27,766 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:27,992 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-07-20 21:32:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:32:27,992 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-20 21:32:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:27,993 INFO L225 Difference]: With dead ends: 110 [2022-07-20 21:32:27,993 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 21:32:27,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 21:32:27,996 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:27,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 34 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:32:27,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 21:32:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2022-07-20 21:32:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-07-20 21:32:28,017 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2022-07-20 21:32:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:28,018 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-07-20 21:32:28,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-07-20 21:32:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 21:32:28,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:28,019 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:28,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:28,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:28,244 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:28,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:28,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2099294916, now seen corresponding path program 17 times [2022-07-20 21:32:28,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:28,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362710097] [2022-07-20 21:32:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:28,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 21:32:28,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362710097] [2022-07-20 21:32:28,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362710097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682153142] [2022-07-20 21:32:28,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:32:28,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:28,369 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) [2022-07-20 21:32:28,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 21:32:28,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 21:32:28,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:32:28,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 21:32:28,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 21:32:28,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682153142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:28,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:28,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-20 21:32:28,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992883765] [2022-07-20 21:32:28,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:28,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:32:28,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:28,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:32:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:32:28,723 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:28,961 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-07-20 21:32:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:32:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-20 21:32:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:28,961 INFO L225 Difference]: With dead ends: 60 [2022-07-20 21:32:28,961 INFO L226 Difference]: Without dead ends: 56 [2022-07-20 21:32:28,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 21:32:28,962 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:28,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 25 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:32:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-20 21:32:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-07-20 21:32:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-07-20 21:32:28,973 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2022-07-20 21:32:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:28,973 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-07-20 21:32:28,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-07-20 21:32:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 21:32:28,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:28,974 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:28,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-20 21:32:29,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:29,174 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1158981530, now seen corresponding path program 18 times [2022-07-20 21:32:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:29,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177542087] [2022-07-20 21:32:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 12 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:32:31,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:31,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177542087] [2022-07-20 21:32:31,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177542087] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:31,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015347620] [2022-07-20 21:32:31,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:32:31,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:31,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:31,430 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) [2022-07-20 21:32:31,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 21:32:31,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 21:32:31,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:31,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-20 21:32:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:31,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:32:34,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:32:34,460 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:32:34,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 31 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 110 treesize of output 479 [2022-07-20 21:32:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 11 proven. 111 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:32:40,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-20 21:32:46,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015347620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:46,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:46,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 36, 33] total 106 [2022-07-20 21:32:46,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774389933] [2022-07-20 21:32:46,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:46,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-07-20 21:32:46,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-07-20 21:32:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=10449, Unknown=0, NotChecked=0, Total=11130 [2022-07-20 21:32:46,841 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 106 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 106 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:53,454 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-07-20 21:32:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-20 21:32:53,454 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 106 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-20 21:32:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:53,455 INFO L225 Difference]: With dead ends: 77 [2022-07-20 21:32:53,455 INFO L226 Difference]: Without dead ends: 73 [2022-07-20 21:32:53,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4918 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=1448, Invalid=21808, Unknown=0, NotChecked=0, Total=23256 [2022-07-20 21:32:53,457 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 972 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:53,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 154 Invalid, 2524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1434 Invalid, 0 Unknown, 972 Unchecked, 0.8s Time] [2022-07-20 21:32:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-20 21:32:53,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2022-07-20 21:32:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-07-20 21:32:53,472 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2022-07-20 21:32:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:53,473 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-07-20 21:32:53,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 106 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-07-20 21:32:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-20 21:32:53,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:53,473 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:53,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:53,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:53,674 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:53,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:53,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1331487352, now seen corresponding path program 19 times [2022-07-20 21:32:53,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:53,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298262595] [2022-07-20 21:32:53,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:53,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 21:32:53,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:53,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298262595] [2022-07-20 21:32:53,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298262595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:53,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610086316] [2022-07-20 21:32:53,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:32:53,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:53,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:53,805 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:32:53,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 21:32:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:53,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:32:53,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 21:32:54,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 21:32:54,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610086316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:54,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:54,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-20 21:32:54,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684071165] [2022-07-20 21:32:54,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:54,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:32:54,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:54,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:32:54,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:32:54,091 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:54,307 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2022-07-20 21:32:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 21:32:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-20 21:32:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:54,308 INFO L225 Difference]: With dead ends: 122 [2022-07-20 21:32:54,308 INFO L226 Difference]: Without dead ends: 67 [2022-07-20 21:32:54,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:32:54,309 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 117 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:54,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 38 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:32:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-20 21:32:54,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2022-07-20 21:32:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-07-20 21:32:54,323 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2022-07-20 21:32:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:54,323 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-07-20 21:32:54,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-07-20 21:32:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 21:32:54,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:54,324 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:54,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:54,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:54,525 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash 147323242, now seen corresponding path program 20 times [2022-07-20 21:32:54,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:54,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685851994] [2022-07-20 21:32:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:54,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:32:54,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685851994] [2022-07-20 21:32:54,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685851994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131455031] [2022-07-20 21:32:54,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:32:54,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:54,696 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:32:54,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 21:32:54,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:32:54,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:54,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:32:54,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:32:54,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:32:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:32:55,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131455031] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:32:55,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:32:55,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-20 21:32:55,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156555276] [2022-07-20 21:32:55,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:32:55,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:32:55,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:32:55,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:32:55,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-20 21:32:55,051 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:32:55,403 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2022-07-20 21:32:55,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:32:55,403 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-20 21:32:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:32:55,404 INFO L225 Difference]: With dead ends: 66 [2022-07-20 21:32:55,404 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 21:32:55,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 21:32:55,405 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:32:55,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 36 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:32:55,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 21:32:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-07-20 21:32:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-07-20 21:32:55,423 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2022-07-20 21:32:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:32:55,424 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-07-20 21:32:55,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:32:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-07-20 21:32:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-20 21:32:55,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:32:55,425 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:32:55,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 21:32:55,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-20 21:32:55,625 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:32:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:32:55,626 INFO L85 PathProgramCache]: Analyzing trace with hash -103051892, now seen corresponding path program 21 times [2022-07-20 21:32:55,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:32:55,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649044948] [2022-07-20 21:32:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:32:55,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:32:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:32:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 1 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:32:58,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:32:58,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649044948] [2022-07-20 21:32:58,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649044948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:32:58,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716726624] [2022-07-20 21:32:58,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:32:58,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:32:58,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:32:58,552 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:32:58,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 21:32:58,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-20 21:32:58,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:32:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-20 21:32:58,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:32:58,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:33:02,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:02,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:33:02,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:03,436 INFO L356 Elim1Store]: treesize reduction 118, result has 79.4 percent of original size [2022-07-20 21:33:03,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 24 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 122 treesize of output 479 [2022-07-20 21:33:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 9 proven. 167 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 21:33:06,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:33:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-20 21:33:15,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716726624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:33:15,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:33:15,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 44, 37] total 122 [2022-07-20 21:33:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504526203] [2022-07-20 21:33:15,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:33:15,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-20 21:33:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:33:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-20 21:33:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=14030, Unknown=0, NotChecked=0, Total=14762 [2022-07-20 21:33:15,024 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 122 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 122 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:33:23,780 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2022-07-20 21:33:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-20 21:33:23,781 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 122 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-20 21:33:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:33:23,781 INFO L225 Difference]: With dead ends: 84 [2022-07-20 21:33:23,782 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 21:33:23,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6179 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1616, Invalid=29890, Unknown=0, NotChecked=0, Total=31506 [2022-07-20 21:33:23,783 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:33:23,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 151 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 407 Invalid, 0 Unknown, 597 Unchecked, 0.2s Time] [2022-07-20 21:33:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 21:33:23,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-07-20 21:33:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-07-20 21:33:23,803 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2022-07-20 21:33:23,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:33:23,803 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-07-20 21:33:23,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 122 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:23,803 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-07-20 21:33:23,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 21:33:23,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:33:23,804 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:33:23,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 21:33:24,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-20 21:33:24,007 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:33:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:33:24,008 INFO L85 PathProgramCache]: Analyzing trace with hash -195387090, now seen corresponding path program 22 times [2022-07-20 21:33:24,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:33:24,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443284] [2022-07-20 21:33:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:33:24,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:33:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:33:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:33:24,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:33:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443284] [2022-07-20 21:33:24,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:33:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961366785] [2022-07-20 21:33:24,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:33:24,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:24,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:33:24,184 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:33:24,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 21:33:24,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:33:24,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:33:24,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 21:33:24,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:33:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:33:24,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:33:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:33:24,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961366785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:33:24,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:33:24,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-20 21:33:24,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080857247] [2022-07-20 21:33:24,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:33:24,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:33:24,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:33:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:33:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:33:24,575 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:33:24,828 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2022-07-20 21:33:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:33:24,829 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-20 21:33:24,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:33:24,829 INFO L225 Difference]: With dead ends: 134 [2022-07-20 21:33:24,829 INFO L226 Difference]: Without dead ends: 73 [2022-07-20 21:33:24,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 21:33:24,830 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 140 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:33:24,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 40 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:33:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-20 21:33:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2022-07-20 21:33:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:24,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-07-20 21:33:24,848 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2022-07-20 21:33:24,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:33:24,848 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-07-20 21:33:24,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-07-20 21:33:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:33:24,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:33:24,849 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:33:24,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-20 21:33:25,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:25,063 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:33:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:33:25,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2104585104, now seen corresponding path program 23 times [2022-07-20 21:33:25,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:33:25,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981111217] [2022-07-20 21:33:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:33:25,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:33:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:33:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-20 21:33:25,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:33:25,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981111217] [2022-07-20 21:33:25,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981111217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:33:25,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066327309] [2022-07-20 21:33:25,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:33:25,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:33:25,264 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:33:25,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 21:33:25,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-20 21:33:25,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:33:25,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 21:33:25,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:33:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-20 21:33:25,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:33:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-20 21:33:25,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066327309] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:33:25,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:33:25,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-20 21:33:25,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104927568] [2022-07-20 21:33:25,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:33:25,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 21:33:25,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:33:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 21:33:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-20 21:33:25,748 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:33:26,131 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-07-20 21:33:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 21:33:26,131 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-20 21:33:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:33:26,132 INFO L225 Difference]: With dead ends: 72 [2022-07-20 21:33:26,132 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 21:33:26,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1911, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:33:26,132 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 123 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:33:26,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 33 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:33:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 21:33:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-07-20 21:33:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-07-20 21:33:26,159 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2022-07-20 21:33:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:33:26,159 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-07-20 21:33:26,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-07-20 21:33:26,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 21:33:26,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:33:26,160 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:33:26,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 21:33:26,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:26,365 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:33:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:33:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash -370078158, now seen corresponding path program 24 times [2022-07-20 21:33:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:33:26,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097994896] [2022-07-20 21:33:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:33:26,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:33:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:33:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 2 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:33:29,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:33:29,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097994896] [2022-07-20 21:33:29,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097994896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:33:29,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117200342] [2022-07-20 21:33:29,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:33:29,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:29,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:33:29,983 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:33:29,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 21:33:30,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-20 21:33:30,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:33:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-20 21:33:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:33:30,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:33:36,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:36,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:36,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:33:36,162 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:33:36,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 53 [2022-07-20 21:33:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 5 proven. 234 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 21:33:36,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:33:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:33:48,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117200342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:33:48,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:33:48,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 49, 41] total 137 [2022-07-20 21:33:48,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25688833] [2022-07-20 21:33:48,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:33:48,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-07-20 21:33:48,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:33:48,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-07-20 21:33:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=17879, Unknown=1, NotChecked=0, Total=18632 [2022-07-20 21:33:48,013 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 137 states, 137 states have (on average 1.2116788321167884) internal successors, (166), 137 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:33:57,309 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-07-20 21:33:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-20 21:33:57,309 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.2116788321167884) internal successors, (166), 137 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-20 21:33:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:33:57,310 INFO L225 Difference]: With dead ends: 93 [2022-07-20 21:33:57,310 INFO L226 Difference]: Without dead ends: 89 [2022-07-20 21:33:57,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7969 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=1594, Invalid=36625, Unknown=1, NotChecked=0, Total=38220 [2022-07-20 21:33:57,314 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1669 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:33:57,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 182 Invalid, 3315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1576 Invalid, 0 Unknown, 1669 Unchecked, 0.8s Time] [2022-07-20 21:33:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-20 21:33:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2022-07-20 21:33:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-07-20 21:33:57,337 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 65 [2022-07-20 21:33:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:33:57,337 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-07-20 21:33:57,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.2116788321167884) internal successors, (166), 137 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-07-20 21:33:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-20 21:33:57,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:33:57,338 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:33:57,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 21:33:57,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-20 21:33:57,543 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:33:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:33:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 890409044, now seen corresponding path program 25 times [2022-07-20 21:33:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:33:57,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177178262] [2022-07-20 21:33:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:33:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:33:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:33:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-20 21:33:57,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:33:57,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177178262] [2022-07-20 21:33:57,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177178262] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:33:57,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292519163] [2022-07-20 21:33:57,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:33:57,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:57,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:33:57,739 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:33:57,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 21:33:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:33:57,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 21:33:57,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:33:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-20 21:33:58,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:33:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-20 21:33:58,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292519163] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:33:58,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:33:58,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-07-20 21:33:58,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488551653] [2022-07-20 21:33:58,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:33:58,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 21:33:58,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:33:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 21:33:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:33:58,122 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:33:58,404 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2022-07-20 21:33:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:33:58,404 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-20 21:33:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:33:58,405 INFO L225 Difference]: With dead ends: 146 [2022-07-20 21:33:58,405 INFO L226 Difference]: Without dead ends: 79 [2022-07-20 21:33:58,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 21:33:58,406 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 162 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:33:58,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 36 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:33:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-20 21:33:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-07-20 21:33:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-07-20 21:33:58,438 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2022-07-20 21:33:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:33:58,439 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-07-20 21:33:58,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-07-20 21:33:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 21:33:58,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:33:58,440 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:33:58,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 21:33:58,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 21:33:58,651 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:33:58,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:33:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash 999713078, now seen corresponding path program 26 times [2022-07-20 21:33:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:33:58,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724797217] [2022-07-20 21:33:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:33:58,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:33:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:33:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:33:58,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:33:58,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724797217] [2022-07-20 21:33:58,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724797217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:33:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700218167] [2022-07-20 21:33:58,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:33:58,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:33:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:33:58,872 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:33:58,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 21:33:58,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:33:58,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:33:58,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 21:33:58,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:33:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:33:59,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:33:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:33:59,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700218167] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:33:59,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:33:59,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-07-20 21:33:59,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801310331] [2022-07-20 21:33:59,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:33:59,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 21:33:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:33:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 21:33:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 21:33:59,303 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:33:59,703 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2022-07-20 21:33:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 21:33:59,703 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-20 21:33:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:33:59,704 INFO L225 Difference]: With dead ends: 78 [2022-07-20 21:33:59,704 INFO L226 Difference]: Without dead ends: 74 [2022-07-20 21:33:59,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=647, Invalid=2323, Unknown=0, NotChecked=0, Total=2970 [2022-07-20 21:33:59,705 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 132 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:33:59,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 24 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:33:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-20 21:33:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-07-20 21:33:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-07-20 21:33:59,729 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2022-07-20 21:33:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:33:59,729 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-07-20 21:33:59,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:33:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-07-20 21:33:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-20 21:33:59,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:33:59,730 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:33:59,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 21:33:59,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 21:33:59,954 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:33:59,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:33:59,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1295173032, now seen corresponding path program 27 times [2022-07-20 21:33:59,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:33:59,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159756792] [2022-07-20 21:33:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:33:59,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:34:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:34:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 36 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:34:04,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:34:04,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159756792] [2022-07-20 21:34:04,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159756792] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:34:04,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307123246] [2022-07-20 21:34:04,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:34:04,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:34:04,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:34:04,618 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:34:04,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 21:34:04,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-20 21:34:04,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:34:04,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-20 21:34:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:34:04,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:34:10,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:10,245 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:34:10,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 251 [2022-07-20 21:34:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 11 proven. 264 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 21:34:10,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:34:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-20 21:34:24,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307123246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:34:24,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:34:24,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 51, 45] total 149 [2022-07-20 21:34:24,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294696287] [2022-07-20 21:34:24,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:34:24,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-07-20 21:34:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:34:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-07-20 21:34:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=21027, Unknown=0, NotChecked=0, Total=22052 [2022-07-20 21:34:24,684 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 149 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 149 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:34:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:34:37,767 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2022-07-20 21:34:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-20 21:34:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 149 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-20 21:34:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:34:37,768 INFO L225 Difference]: With dead ends: 100 [2022-07-20 21:34:37,768 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 21:34:37,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9928 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=2365, Invalid=44507, Unknown=0, NotChecked=0, Total=46872 [2022-07-20 21:34:37,771 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 3221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1527 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:34:37,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 178 Invalid, 3221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1611 Invalid, 0 Unknown, 1527 Unchecked, 0.9s Time] [2022-07-20 21:34:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 21:34:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2022-07-20 21:34:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:34:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-07-20 21:34:37,820 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 71 [2022-07-20 21:34:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:34:37,820 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-07-20 21:34:37,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.1812080536912752) internal successors, (176), 149 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:34:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-07-20 21:34:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 21:34:37,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:34:37,821 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:34:37,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-20 21:34:38,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:34:38,021 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:34:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:34:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash 932465402, now seen corresponding path program 28 times [2022-07-20 21:34:38,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:34:38,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516127127] [2022-07-20 21:34:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:34:38,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:34:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:34:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:34:38,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:34:38,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516127127] [2022-07-20 21:34:38,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516127127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:34:38,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257253429] [2022-07-20 21:34:38,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:34:38,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:34:38,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:34:38,217 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:34:38,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 21:34:38,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:34:38,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:34:38,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 21:34:38,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:34:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:34:38,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:34:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:34:38,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257253429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:34:38,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:34:38,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-07-20 21:34:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180981114] [2022-07-20 21:34:38,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:34:38,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 21:34:38,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:34:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 21:34:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 21:34:38,658 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:34:39,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:34:39,020 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2022-07-20 21:34:39,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 21:34:39,020 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-20 21:34:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:34:39,021 INFO L225 Difference]: With dead ends: 158 [2022-07-20 21:34:39,021 INFO L226 Difference]: Without dead ends: 85 [2022-07-20 21:34:39,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 21:34:39,022 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 195 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:34:39,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 34 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:34:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-20 21:34:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2022-07-20 21:34:39,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:34:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-07-20 21:34:39,057 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2022-07-20 21:34:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:34:39,057 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-07-20 21:34:39,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:34:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-07-20 21:34:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 21:34:39,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:34:39,058 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:34:39,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-20 21:34:39,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:34:39,267 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:34:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:34:39,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1524084132, now seen corresponding path program 29 times [2022-07-20 21:34:39,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:34:39,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831775084] [2022-07-20 21:34:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:34:39,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:34:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:34:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 21:34:39,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:34:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831775084] [2022-07-20 21:34:39,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831775084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:34:39,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462262762] [2022-07-20 21:34:39,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:34:39,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:34:39,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:34:39,520 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:34:39,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 21:34:39,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-20 21:34:39,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:34:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 21:34:39,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:34:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 21:34:40,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:34:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 21:34:40,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462262762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:34:40,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:34:40,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-07-20 21:34:40,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598745210] [2022-07-20 21:34:40,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:34:40,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 21:34:40,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:34:40,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 21:34:40,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 21:34:40,203 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:34:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:34:40,650 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2022-07-20 21:34:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 21:34:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-20 21:34:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:34:40,652 INFO L225 Difference]: With dead ends: 84 [2022-07-20 21:34:40,652 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 21:34:40,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=765, Invalid=2775, Unknown=0, NotChecked=0, Total=3540 [2022-07-20 21:34:40,653 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 120 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:34:40,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 28 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:34:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 21:34:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-07-20 21:34:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:34:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-07-20 21:34:40,702 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2022-07-20 21:34:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:34:40,702 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-07-20 21:34:40,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:34:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-07-20 21:34:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 21:34:40,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:34:40,703 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:34:40,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 21:34:40,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:34:40,915 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:34:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:34:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash -7769602, now seen corresponding path program 30 times [2022-07-20 21:34:40,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:34:40,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327803720] [2022-07-20 21:34:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:34:40,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:34:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:34:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 25 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:34:45,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:34:45,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327803720] [2022-07-20 21:34:45,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327803720] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:34:45,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896997618] [2022-07-20 21:34:45,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:34:45,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:34:45,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:34:45,837 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:34:45,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 21:34:46,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-20 21:34:46,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:34:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-20 21:34:46,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:34:46,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:34:54,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:34:54,441 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:34:54,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 84 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 158 treesize of output 593 [2022-07-20 21:34:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 17 proven. 282 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 21:34:56,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:35:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 21:35:14,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896997618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:35:14,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:35:14,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 53, 49] total 160 [2022-07-20 21:35:14,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942827951] [2022-07-20 21:35:14,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:35:14,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-07-20 21:35:14,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:35:14,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-07-20 21:35:14,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1235, Invalid=24205, Unknown=0, NotChecked=0, Total=25440 [2022-07-20 21:35:14,369 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 160 states, 160 states have (on average 1.16875) internal successors, (187), 160 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:35:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:35:33,400 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2022-07-20 21:35:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-20 21:35:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 1.16875) internal successors, (187), 160 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-20 21:35:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:35:33,401 INFO L225 Difference]: With dead ends: 109 [2022-07-20 21:35:33,401 INFO L226 Difference]: Without dead ends: 105 [2022-07-20 21:35:33,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9888 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=2728, Invalid=50864, Unknown=0, NotChecked=0, Total=53592 [2022-07-20 21:35:33,404 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 4591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1759 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:35:33,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 208 Invalid, 4591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2640 Invalid, 0 Unknown, 1759 Unchecked, 1.5s Time] [2022-07-20 21:35:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-20 21:35:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2022-07-20 21:35:33,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:35:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-07-20 21:35:33,440 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 77 [2022-07-20 21:35:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:35:33,441 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-07-20 21:35:33,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 1.16875) internal successors, (187), 160 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:35:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-07-20 21:35:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 21:35:33,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:35:33,441 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:35:33,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-20 21:35:33,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-20 21:35:33,642 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:35:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:35:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1176580384, now seen corresponding path program 31 times [2022-07-20 21:35:33,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:35:33,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999536772] [2022-07-20 21:35:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:35:33,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:35:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:35:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 21:35:33,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:35:33,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999536772] [2022-07-20 21:35:33,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999536772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:35:33,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746222223] [2022-07-20 21:35:33,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:35:33,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:35:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:35:33,898 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:35:33,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 21:35:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:35:33,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:35:33,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:35:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 21:35:34,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:35:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 21:35:34,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746222223] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:35:34,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:35:34,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2022-07-20 21:35:34,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081108550] [2022-07-20 21:35:34,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:35:34,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 21:35:34,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:35:34,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 21:35:34,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 21:35:34,393 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:35:34,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:35:34,780 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2022-07-20 21:35:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 21:35:34,781 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-20 21:35:34,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:35:34,781 INFO L225 Difference]: With dead ends: 170 [2022-07-20 21:35:34,781 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 21:35:34,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 21:35:34,782 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 237 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:35:34,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 32 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:35:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 21:35:34,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2022-07-20 21:35:34,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:35:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-07-20 21:35:34,821 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2022-07-20 21:35:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:35:34,821 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-07-20 21:35:34,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:35:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-07-20 21:35:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-20 21:35:34,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:35:34,822 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:35:34,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-20 21:35:35,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:35:35,022 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:35:35,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:35:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1550809342, now seen corresponding path program 32 times [2022-07-20 21:35:35,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:35:35,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668055450] [2022-07-20 21:35:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:35:35,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:35:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:35:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-20 21:35:35,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:35:35,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668055450] [2022-07-20 21:35:35,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668055450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:35:35,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415570625] [2022-07-20 21:35:35,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:35:35,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:35:35,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:35:35,300 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:35:35,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 21:35:35,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:35:35,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:35:35,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 21:35:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:35:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-20 21:35:35,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:35:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-20 21:35:35,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415570625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:35:35,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:35:35,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2022-07-20 21:35:35,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315504658] [2022-07-20 21:35:35,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:35:35,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 21:35:35,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:35:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 21:35:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 21:35:35,754 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:35:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:35:36,320 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2022-07-20 21:35:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 21:35:36,321 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-20 21:35:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:35:36,321 INFO L225 Difference]: With dead ends: 90 [2022-07-20 21:35:36,321 INFO L226 Difference]: Without dead ends: 86 [2022-07-20 21:35:36,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 21:35:36,322 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 121 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:35:36,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 40 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:35:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-20 21:35:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-07-20 21:35:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:35:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-07-20 21:35:36,356 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2022-07-20 21:35:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:35:36,357 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-07-20 21:35:36,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:35:36,357 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-07-20 21:35:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-20 21:35:36,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:35:36,357 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:35:36,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 21:35:36,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:35:36,558 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:35:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:35:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash 79107364, now seen corresponding path program 33 times [2022-07-20 21:35:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:35:36,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424010709] [2022-07-20 21:35:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:35:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:35:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:35:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 64 proven. 368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:35:42,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:35:42,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424010709] [2022-07-20 21:35:42,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424010709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:35:42,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732705862] [2022-07-20 21:35:42,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:35:42,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:35:42,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:35:42,903 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:35:42,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 21:35:43,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-20 21:35:43,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:35:43,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 135 conjunts are in the unsatisfiable core [2022-07-20 21:35:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:35:43,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:35:43,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11