./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/loop-invgen/fragtest_simple.i -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 be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 10:40:11,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 10:40:11,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 10:40:11,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 10:40:11,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 10:40:11,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 10:40:11,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 10:40:11,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 10:40:11,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 10:40:11,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 10:40:11,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 10:40:11,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 10:40:11,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 10:40:11,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 10:40:11,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 10:40:11,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 10:40:11,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 10:40:11,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 10:40:11,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 10:40:11,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 10:40:11,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 10:40:11,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 10:40:11,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 10:40:11,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 10:40:11,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 10:40:11,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 10:40:11,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 10:40:11,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 10:40:11,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 10:40:11,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 10:40:11,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 10:40:11,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 10:40:11,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 10:40:11,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 10:40:11,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 10:40:11,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 10:40:11,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 10:40:11,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 10:40:11,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 10:40:11,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 10:40:11,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 10:40:11,683 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 10:40:11,710 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 10:40:11,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 10:40:11,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 10:40:11,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 10:40:11,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 10:40:11,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 10:40:11,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 10:40:11,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 10:40:11,712 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 10:40:11,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 10:40:11,713 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 10:40:11,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 10:40:11,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 10:40:11,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 10:40:11,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 10:40:11,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 10:40:11,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 10:40:11,714 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 10:40:11,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 10:40:11,714 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 10:40:11,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 10:40:11,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 10:40:11,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 10:40:11,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 10:40:11,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:40:11,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 10:40:11,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 10:40:11,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 10:40:11,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 10:40:11,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 10:40:11,716 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 10:40:11,716 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 10:40:11,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 10:40:11,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 10:40:11,716 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2021-12-22 10:40:11,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 10:40:11,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 10:40:11,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 10:40:11,907 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 10:40:11,908 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 10:40:11,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2021-12-22 10:40:11,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c407dbef/832cebb926f947d784eee64cb2fc65f4/FLAG6b63f910f [2021-12-22 10:40:12,251 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 10:40:12,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2021-12-22 10:40:12,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c407dbef/832cebb926f947d784eee64cb2fc65f4/FLAG6b63f910f [2021-12-22 10:40:12,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c407dbef/832cebb926f947d784eee64cb2fc65f4 [2021-12-22 10:40:12,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 10:40:12,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 10:40:12,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 10:40:12,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 10:40:12,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 10:40:12,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676fa201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12, skipping insertion in model container [2021-12-22 10:40:12,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 10:40:12,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 10:40:12,897 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/loop-invgen/fragtest_simple.i[893,906] [2021-12-22 10:40:12,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:40:12,908 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 10:40:12,915 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/loop-invgen/fragtest_simple.i[893,906] [2021-12-22 10:40:12,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 10:40:12,926 INFO L208 MainTranslator]: Completed translation [2021-12-22 10:40:12,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12 WrapperNode [2021-12-22 10:40:12,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 10:40:12,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 10:40:12,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 10:40:12,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 10:40:12,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,946 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-12-22 10:40:12,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 10:40:12,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 10:40:12,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 10:40:12,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 10:40:12,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 10:40:12,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 10:40:12,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 10:40:12,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 10:40:12,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (1/1) ... [2021-12-22 10:40:12,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 10:40:12,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:12,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 10:40:13,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 10:40:13,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 10:40:13,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 10:40:13,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 10:40:13,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 10:40:13,062 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 10:40:13,063 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 10:40:13,169 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 10:40:13,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 10:40:13,173 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 10:40:13,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:40:13 BoogieIcfgContainer [2021-12-22 10:40:13,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 10:40:13,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 10:40:13,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 10:40:13,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 10:40:13,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:40:12" (1/3) ... [2021-12-22 10:40:13,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4f3214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:40:13, skipping insertion in model container [2021-12-22 10:40:13,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:40:12" (2/3) ... [2021-12-22 10:40:13,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4f3214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:40:13, skipping insertion in model container [2021-12-22 10:40:13,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:40:13" (3/3) ... [2021-12-22 10:40:13,179 INFO L111 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2021-12-22 10:40:13,182 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 10:40:13,182 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 10:40:13,209 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 10:40:13,213 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 10:40:13,213 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 10:40:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 10:40:13,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:13,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:13,225 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:13,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1265170590, now seen corresponding path program 1 times [2021-12-22 10:40:13,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:13,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69801746] [2021-12-22 10:40:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:13,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:13,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:13,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69801746] [2021-12-22 10:40:13,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69801746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:40:13,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:40:13,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 10:40:13,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307924387] [2021-12-22 10:40:13,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:40:13,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 10:40:13,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:13,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 10:40:13,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 10:40:13,361 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:13,371 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2021-12-22 10:40:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 10:40:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-12-22 10:40:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:13,378 INFO L225 Difference]: With dead ends: 34 [2021-12-22 10:40:13,378 INFO L226 Difference]: Without dead ends: 15 [2021-12-22 10:40:13,380 INFO L932 BasicCegarLoop]: 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 [2021-12-22 10:40:13,382 INFO L933 BasicCegarLoop]: 22 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, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:13,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:40:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-22 10:40:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-22 10:40:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-12-22 10:40:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-12-22 10:40:13,404 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2021-12-22 10:40:13,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:13,405 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-12-22 10:40:13,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:13,405 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-12-22 10:40:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 10:40:13,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:13,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:13,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 10:40:13,406 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1704738984, now seen corresponding path program 1 times [2021-12-22 10:40:13,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:13,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334909424] [2021-12-22 10:40:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:13,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:13,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:13,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334909424] [2021-12-22 10:40:13,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334909424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:40:13,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:40:13,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 10:40:13,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040346760] [2021-12-22 10:40:13,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:40:13,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 10:40:13,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 10:40:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 10:40:13,530 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:13,564 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-12-22 10:40:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:40:13,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-22 10:40:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:13,588 INFO L225 Difference]: With dead ends: 20 [2021-12-22 10:40:13,589 INFO L226 Difference]: Without dead ends: 18 [2021-12-22 10:40:13,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:40:13,590 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:13,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:40:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-22 10:40:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-12-22 10:40:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2021-12-22 10:40:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-22 10:40:13,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2021-12-22 10:40:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:13,597 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-22 10:40:13,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-22 10:40:13,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 10:40:13,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:13,598 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:13,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 10:40:13,599 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:13,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:13,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1111328011, now seen corresponding path program 1 times [2021-12-22 10:40:13,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:13,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087067888] [2021-12-22 10:40:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:13,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:13,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:13,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087067888] [2021-12-22 10:40:13,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087067888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 10:40:13,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 10:40:13,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 10:40:13,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606005267] [2021-12-22 10:40:13,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 10:40:13,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 10:40:13,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:13,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 10:40:13,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 10:40:13,701 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:13,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:13,750 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-22 10:40:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 10:40:13,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 10:40:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:13,752 INFO L225 Difference]: With dead ends: 34 [2021-12-22 10:40:13,753 INFO L226 Difference]: Without dead ends: 23 [2021-12-22 10:40:13,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 10:40:13,755 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:13,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:40:13,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-22 10:40:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-12-22 10:40:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-22 10:40:13,763 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2021-12-22 10:40:13,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:13,764 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-22 10:40:13,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-22 10:40:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 10:40:13,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:13,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:13,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 10:40:13,766 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:13,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1396960176, now seen corresponding path program 1 times [2021-12-22 10:40:13,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:13,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439586123] [2021-12-22 10:40:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:13,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:13,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:13,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439586123] [2021-12-22 10:40:13,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439586123] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:13,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127810245] [2021-12-22 10:40:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:13,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:13,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:13,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:13,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 10:40:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:13,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 10:40:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:14,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:14,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127810245] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:14,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:14,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-22 10:40:14,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134170490] [2021-12-22 10:40:14,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:14,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 10:40:14,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:14,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 10:40:14,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-22 10:40:14,101 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:14,257 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-12-22 10:40:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 10:40:14,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-22 10:40:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:14,258 INFO L225 Difference]: With dead ends: 45 [2021-12-22 10:40:14,259 INFO L226 Difference]: Without dead ends: 34 [2021-12-22 10:40:14,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-12-22 10:40:14,261 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:14,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-22 10:40:14,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-12-22 10:40:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-22 10:40:14,270 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-12-22 10:40:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:14,270 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-22 10:40:14,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:14,271 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-22 10:40:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 10:40:14,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:14,271 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:14,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:14,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:14,494 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2071602104, now seen corresponding path program 2 times [2021-12-22 10:40:14,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:14,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203746394] [2021-12-22 10:40:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:14,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:14,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203746394] [2021-12-22 10:40:14,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203746394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:14,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838242879] [2021-12-22 10:40:14,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:40:14,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:14,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:14,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:14,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 10:40:14,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:40:14,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:14,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 10:40:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:14,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:14,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838242879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:14,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:14,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2021-12-22 10:40:14,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298567779] [2021-12-22 10:40:14,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:14,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 10:40:14,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:14,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 10:40:14,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-22 10:40:14,775 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:14,920 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-12-22 10:40:14,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 10:40:14,920 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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 24 [2021-12-22 10:40:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:14,922 INFO L225 Difference]: With dead ends: 61 [2021-12-22 10:40:14,922 INFO L226 Difference]: Without dead ends: 46 [2021-12-22 10:40:14,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-12-22 10:40:14,923 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:14,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 59 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-22 10:40:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-12-22 10:40:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-22 10:40:14,927 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2021-12-22 10:40:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:14,928 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-22 10:40:14,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-22 10:40:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 10:40:14,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:14,928 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:14,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:15,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:15,147 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:15,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1976024800, now seen corresponding path program 3 times [2021-12-22 10:40:15,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:15,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714032901] [2021-12-22 10:40:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:15,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:15,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714032901] [2021-12-22 10:40:15,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714032901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:15,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953834097] [2021-12-22 10:40:15,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:40:15,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:15,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:15,215 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:15,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 10:40:15,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-22 10:40:15,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:15,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 10:40:15,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:15,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:15,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953834097] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:15,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:15,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 15 [2021-12-22 10:40:15,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576979304] [2021-12-22 10:40:15,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:15,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 10:40:15,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:15,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 10:40:15,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-22 10:40:15,378 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:15,573 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-12-22 10:40:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 10:40:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-22 10:40:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:15,574 INFO L225 Difference]: With dead ends: 75 [2021-12-22 10:40:15,574 INFO L226 Difference]: Without dead ends: 56 [2021-12-22 10:40:15,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-12-22 10:40:15,575 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:15,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 93 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-22 10:40:15,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 37. [2021-12-22 10:40:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-12-22 10:40:15,580 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2021-12-22 10:40:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:15,580 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-12-22 10:40:15,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-12-22 10:40:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 10:40:15,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:15,581 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:15,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:15,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:15,786 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:15,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:15,787 INFO L85 PathProgramCache]: Analyzing trace with hash -634009032, now seen corresponding path program 4 times [2021-12-22 10:40:15,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:15,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692673736] [2021-12-22 10:40:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:15,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 23 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:15,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:15,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692673736] [2021-12-22 10:40:15,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692673736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:15,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167612050] [2021-12-22 10:40:15,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 10:40:15,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:15,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:15,951 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:15,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 10:40:16,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 10:40:16,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 10:40:16,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:16,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:16,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167612050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:16,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:16,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2021-12-22 10:40:16,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743177651] [2021-12-22 10:40:16,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:16,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 10:40:16,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 10:40:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-12-22 10:40:16,220 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2021-12-22 10:40:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:16,315 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2021-12-22 10:40:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 10:40:16,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) Word has length 36 [2021-12-22 10:40:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:16,316 INFO L225 Difference]: With dead ends: 82 [2021-12-22 10:40:16,316 INFO L226 Difference]: Without dead ends: 59 [2021-12-22 10:40:16,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-12-22 10:40:16,317 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:16,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 85 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-22 10:40:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-12-22 10:40:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 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) [2021-12-22 10:40:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-12-22 10:40:16,321 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2021-12-22 10:40:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:16,321 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-12-22 10:40:16,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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) [2021-12-22 10:40:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-12-22 10:40:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 10:40:16,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:16,322 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:16,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:16,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:16,527 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:16,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1017343069, now seen corresponding path program 5 times [2021-12-22 10:40:16,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:16,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396138225] [2021-12-22 10:40:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:16,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:16,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396138225] [2021-12-22 10:40:16,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396138225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122416751] [2021-12-22 10:40:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 10:40:16,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:16,624 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:16,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 10:40:16,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-22 10:40:16,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:16,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 10:40:16,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:16,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:16,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122416751] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:16,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:16,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2021-12-22 10:40:16,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559216258] [2021-12-22 10:40:16,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:16,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 10:40:16,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:16,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 10:40:16,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-22 10:40:16,791 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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) [2021-12-22 10:40:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:16,867 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-12-22 10:40:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 10:40:16,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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 38 [2021-12-22 10:40:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:16,868 INFO L225 Difference]: With dead ends: 56 [2021-12-22 10:40:16,868 INFO L226 Difference]: Without dead ends: 54 [2021-12-22 10:40:16,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-12-22 10:40:16,869 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:16,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 86 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:40:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-22 10:40:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2021-12-22 10:40:16,873 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) [2021-12-22 10:40:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-12-22 10:40:16,874 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 38 [2021-12-22 10:40:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:16,874 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-12-22 10:40:16,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 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) [2021-12-22 10:40:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-12-22 10:40:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 10:40:16,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:16,875 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:16,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:17,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:17,083 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:17,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1327501635, now seen corresponding path program 6 times [2021-12-22 10:40:17,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:17,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970156049] [2021-12-22 10:40:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:17,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 57 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:17,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:17,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970156049] [2021-12-22 10:40:17,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970156049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:17,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194433654] [2021-12-22 10:40:17,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 10:40:17,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:17,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:17,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:17,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 10:40:17,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-22 10:40:17,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 10:40:17,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:17,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:17,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194433654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:17,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:17,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2021-12-22 10:40:17,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094388404] [2021-12-22 10:40:17,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:17,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 10:40:17,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:17,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 10:40:17,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-12-22 10:40:17,578 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:17,765 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2021-12-22 10:40:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 10:40:17,765 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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 46 [2021-12-22 10:40:17,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:17,766 INFO L225 Difference]: With dead ends: 133 [2021-12-22 10:40:17,766 INFO L226 Difference]: Without dead ends: 79 [2021-12-22 10:40:17,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-12-22 10:40:17,767 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:17,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 165 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-22 10:40:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2021-12-22 10:40:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 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) [2021-12-22 10:40:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-12-22 10:40:17,772 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2021-12-22 10:40:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:17,772 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-12-22 10:40:17,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-12-22 10:40:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 10:40:17,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:17,773 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:17,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:17,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:17,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash 359898061, now seen corresponding path program 7 times [2021-12-22 10:40:17,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:17,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531222096] [2021-12-22 10:40:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:17,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 42 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:18,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:18,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531222096] [2021-12-22 10:40:18,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531222096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612519030] [2021-12-22 10:40:18,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 10:40:18,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:18,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:18,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:18,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 10:40:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:18,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 10:40:18,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:18,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:18,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612519030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:18,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:18,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2021-12-22 10:40:18,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377013387] [2021-12-22 10:40:18,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:18,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 10:40:18,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:18,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 10:40:18,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-12-22 10:40:18,360 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:18,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:18,470 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-12-22 10:40:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 10:40:18,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 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 50 [2021-12-22 10:40:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:18,471 INFO L225 Difference]: With dead ends: 68 [2021-12-22 10:40:18,471 INFO L226 Difference]: Without dead ends: 66 [2021-12-22 10:40:18,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-12-22 10:40:18,472 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:18,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 99 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:40:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-22 10:40:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2021-12-22 10:40:18,476 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) [2021-12-22 10:40:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-12-22 10:40:18,477 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 50 [2021-12-22 10:40:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:18,477 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-12-22 10:40:18,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-12-22 10:40:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 10:40:18,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:18,478 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:18,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:18,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:18,694 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:18,695 INFO L85 PathProgramCache]: Analyzing trace with hash -968765261, now seen corresponding path program 8 times [2021-12-22 10:40:18,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:18,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432021934] [2021-12-22 10:40:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:18,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 107 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:18,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:18,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432021934] [2021-12-22 10:40:18,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432021934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:18,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3239046] [2021-12-22 10:40:18,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:40:18,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:18,868 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:18,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 10:40:18,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:40:18,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:18,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 10:40:18,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:40:19,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:40:19,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3239046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:19,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:19,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 29 [2021-12-22 10:40:19,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605255356] [2021-12-22 10:40:19,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:19,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 10:40:19,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:19,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 10:40:19,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-12-22 10:40:19,237 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:19,376 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2021-12-22 10:40:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 10:40:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 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 58 [2021-12-22 10:40:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:19,377 INFO L225 Difference]: With dead ends: 130 [2021-12-22 10:40:19,377 INFO L226 Difference]: Without dead ends: 93 [2021-12-22 10:40:19,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 10:40:19,378 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:19,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 132 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:19,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-22 10:40:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-12-22 10:40:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-12-22 10:40:19,383 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2021-12-22 10:40:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:19,383 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-12-22 10:40:19,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-12-22 10:40:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-22 10:40:19,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:19,384 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:19,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:19,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 10:40:19,600 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:19,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:19,600 INFO L85 PathProgramCache]: Analyzing trace with hash 85268760, now seen corresponding path program 9 times [2021-12-22 10:40:19,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:19,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094373226] [2021-12-22 10:40:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:19,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 107 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:19,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:19,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094373226] [2021-12-22 10:40:19,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094373226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:19,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436562532] [2021-12-22 10:40:19,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:40:19,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:19,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:19,739 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:19,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 10:40:19,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-22 10:40:19,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 10:40:19,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:20,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:20,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436562532] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:20,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:20,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2021-12-22 10:40:20,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247820783] [2021-12-22 10:40:20,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:20,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-22 10:40:20,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:20,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-22 10:40:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2021-12-22 10:40:20,151 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:20,323 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2021-12-22 10:40:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 10:40:20,323 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 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 60 [2021-12-22 10:40:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:20,323 INFO L225 Difference]: With dead ends: 138 [2021-12-22 10:40:20,324 INFO L226 Difference]: Without dead ends: 99 [2021-12-22 10:40:20,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=1155, Unknown=0, NotChecked=0, Total=1560 [2021-12-22 10:40:20,324 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 100 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:20,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 190 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-22 10:40:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2021-12-22 10:40:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 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) [2021-12-22 10:40:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-12-22 10:40:20,331 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2021-12-22 10:40:20,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:20,333 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-12-22 10:40:20,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:20,333 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-12-22 10:40:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 10:40:20,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:20,334 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:20,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:20,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:20,543 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:20,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:20,544 INFO L85 PathProgramCache]: Analyzing trace with hash -600318915, now seen corresponding path program 10 times [2021-12-22 10:40:20,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:20,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041070542] [2021-12-22 10:40:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:20,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:20,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041070542] [2021-12-22 10:40:20,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041070542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:20,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026887028] [2021-12-22 10:40:20,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 10:40:20,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:20,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:20,640 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:20,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 10:40:20,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 10:40:20,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-22 10:40:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:20,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:20,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026887028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:20,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:20,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2021-12-22 10:40:20,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238962676] [2021-12-22 10:40:20,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:20,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 10:40:20,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:20,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 10:40:20,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-12-22 10:40:20,919 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:21,031 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-12-22 10:40:21,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 10:40:21,031 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 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 62 [2021-12-22 10:40:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:21,032 INFO L225 Difference]: With dead ends: 80 [2021-12-22 10:40:21,032 INFO L226 Difference]: Without dead ends: 78 [2021-12-22 10:40:21,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-12-22 10:40:21,033 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 54 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:21,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 138 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 10:40:21,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-22 10:40:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-12-22 10:40:21,037 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) [2021-12-22 10:40:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-12-22 10:40:21,038 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 62 [2021-12-22 10:40:21,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:21,038 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-12-22 10:40:21,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-12-22 10:40:21,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 10:40:21,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:21,039 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:21,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:21,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 10:40:21,257 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:21,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2101960413, now seen corresponding path program 11 times [2021-12-22 10:40:21,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:21,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692339636] [2021-12-22 10:40:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:21,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 173 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:21,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:21,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692339636] [2021-12-22 10:40:21,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692339636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:21,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113545022] [2021-12-22 10:40:21,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 10:40:21,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:21,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:21,464 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:21,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 10:40:21,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-22 10:40:21,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:21,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 10:40:21,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:21,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:21,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113545022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:21,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:21,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2021-12-22 10:40:21,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154563628] [2021-12-22 10:40:21,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:21,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-22 10:40:21,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:21,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-22 10:40:21,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 10:40:21,981 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:22,308 INFO L93 Difference]: Finished difference Result 205 states and 232 transitions. [2021-12-22 10:40:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 10:40:22,308 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 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 70 [2021-12-22 10:40:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:22,309 INFO L225 Difference]: With dead ends: 205 [2021-12-22 10:40:22,309 INFO L226 Difference]: Without dead ends: 119 [2021-12-22 10:40:22,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2021-12-22 10:40:22,310 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:22,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 214 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-22 10:40:22,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2021-12-22 10:40:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 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) [2021-12-22 10:40:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-12-22 10:40:22,314 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2021-12-22 10:40:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:22,314 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-12-22 10:40:22,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:22,314 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-12-22 10:40:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 10:40:22,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:22,315 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:22,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:22,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 10:40:22,519 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1953124947, now seen corresponding path program 12 times [2021-12-22 10:40:22,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:22,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462375841] [2021-12-22 10:40:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:22,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 110 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:22,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:22,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462375841] [2021-12-22 10:40:22,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462375841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:22,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928373574] [2021-12-22 10:40:22,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 10:40:22,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:22,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:22,708 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:22,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 10:40:22,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-22 10:40:22,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 10:40:22,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:22,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:23,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928373574] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:23,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:23,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2021-12-22 10:40:23,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686594895] [2021-12-22 10:40:23,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:23,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 10:40:23,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:23,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 10:40:23,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-12-22 10:40:23,016 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:23,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:23,172 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-12-22 10:40:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-22 10:40:23,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 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 74 [2021-12-22 10:40:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:23,173 INFO L225 Difference]: With dead ends: 92 [2021-12-22 10:40:23,173 INFO L226 Difference]: Without dead ends: 90 [2021-12-22 10:40:23,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2021-12-22 10:40:23,174 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:23,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 139 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-22 10:40:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2021-12-22 10:40:23,180 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) [2021-12-22 10:40:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-12-22 10:40:23,180 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 74 [2021-12-22 10:40:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:23,180 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-12-22 10:40:23,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-12-22 10:40:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-22 10:40:23,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:23,181 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:23,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:23,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 10:40:23,396 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1101267603, now seen corresponding path program 13 times [2021-12-22 10:40:23,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:23,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425090377] [2021-12-22 10:40:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:23,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 255 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:23,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:23,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425090377] [2021-12-22 10:40:23,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425090377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:23,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052945453] [2021-12-22 10:40:23,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 10:40:23,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:23,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:23,599 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:23,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 10:40:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:23,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 10:40:23,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:40:24,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:40:24,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052945453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:24,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:24,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2021-12-22 10:40:24,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053215610] [2021-12-22 10:40:24,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:24,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-22 10:40:24,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-22 10:40:24,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2021-12-22 10:40:24,099 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:24,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:24,341 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2021-12-22 10:40:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 10:40:24,341 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 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 82 [2021-12-22 10:40:24,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:24,342 INFO L225 Difference]: With dead ends: 186 [2021-12-22 10:40:24,342 INFO L226 Difference]: Without dead ends: 133 [2021-12-22 10:40:24,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=695, Invalid=2061, Unknown=0, NotChecked=0, Total=2756 [2021-12-22 10:40:24,343 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:24,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 330 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:24,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-22 10:40:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 85. [2021-12-22 10:40:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-12-22 10:40:24,356 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 82 [2021-12-22 10:40:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:24,356 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-12-22 10:40:24,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-12-22 10:40:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 10:40:24,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:24,359 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:24,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:24,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 10:40:24,571 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1272075272, now seen corresponding path program 14 times [2021-12-22 10:40:24,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:24,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915814042] [2021-12-22 10:40:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:24,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 255 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:24,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915814042] [2021-12-22 10:40:24,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915814042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353552210] [2021-12-22 10:40:24,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:40:24,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:24,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:24,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:24,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 10:40:24,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:40:24,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:24,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-22 10:40:24,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 156 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:25,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 156 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353552210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:25,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:25,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 42 [2021-12-22 10:40:25,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343412052] [2021-12-22 10:40:25,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:25,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-22 10:40:25,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:25,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-22 10:40:25,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2021-12-22 10:40:25,219 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 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) [2021-12-22 10:40:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:25,996 INFO L93 Difference]: Finished difference Result 201 states and 232 transitions. [2021-12-22 10:40:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-22 10:40:25,996 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 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 84 [2021-12-22 10:40:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:25,997 INFO L225 Difference]: With dead ends: 201 [2021-12-22 10:40:25,997 INFO L226 Difference]: Without dead ends: 146 [2021-12-22 10:40:26,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1501, Invalid=7241, Unknown=0, NotChecked=0, Total=8742 [2021-12-22 10:40:26,000 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 340 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:26,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 200 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 10:40:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-22 10:40:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 91. [2021-12-22 10:40:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-12-22 10:40:26,010 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2021-12-22 10:40:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:26,010 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-12-22 10:40:26,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 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) [2021-12-22 10:40:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-12-22 10:40:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 10:40:26,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:26,011 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:26,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:26,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:26,232 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash -641963184, now seen corresponding path program 15 times [2021-12-22 10:40:26,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:26,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060809887] [2021-12-22 10:40:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:26,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 302 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:26,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:26,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060809887] [2021-12-22 10:40:26,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060809887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:26,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31345296] [2021-12-22 10:40:26,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:40:26,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:26,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:26,525 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:26,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 10:40:26,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-22 10:40:26,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 10:40:26,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:27,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:27,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31345296] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:27,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:27,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2021-12-22 10:40:27,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892405945] [2021-12-22 10:40:27,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:27,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-22 10:40:27,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:27,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-22 10:40:27,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 10:40:27,212 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:27,506 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2021-12-22 10:40:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-22 10:40:27,507 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 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 90 [2021-12-22 10:40:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:27,508 INFO L225 Difference]: With dead ends: 208 [2021-12-22 10:40:27,508 INFO L226 Difference]: Without dead ends: 149 [2021-12-22 10:40:27,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-12-22 10:40:27,510 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 144 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:27,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 322 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:40:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-22 10:40:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2021-12-22 10:40:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2021-12-22 10:40:27,516 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 90 [2021-12-22 10:40:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:27,517 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2021-12-22 10:40:27,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:27,517 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2021-12-22 10:40:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 10:40:27,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:27,517 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:27,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:27,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 10:40:27,725 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1603067829, now seen corresponding path program 16 times [2021-12-22 10:40:27,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:27,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980737816] [2021-12-22 10:40:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:27,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 182 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:27,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:27,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980737816] [2021-12-22 10:40:27,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980737816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:27,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077858390] [2021-12-22 10:40:27,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 10:40:27,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:27,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:27,866 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:27,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 10:40:27,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 10:40:27,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 10:40:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:28,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:28,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077858390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:28,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:28,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2021-12-22 10:40:28,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928029861] [2021-12-22 10:40:28,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:28,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 10:40:28,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 10:40:28,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-12-22 10:40:28,188 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:28,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:28,415 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2021-12-22 10:40:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-22 10:40:28,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 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 92 [2021-12-22 10:40:28,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:28,416 INFO L225 Difference]: With dead ends: 110 [2021-12-22 10:40:28,416 INFO L226 Difference]: Without dead ends: 108 [2021-12-22 10:40:28,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=502, Invalid=904, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 10:40:28,417 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:28,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 197 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-22 10:40:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-12-22 10:40:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 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) [2021-12-22 10:40:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2021-12-22 10:40:28,423 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 92 [2021-12-22 10:40:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:28,424 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2021-12-22 10:40:28,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2021-12-22 10:40:28,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-22 10:40:28,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:28,425 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:28,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:28,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:28,627 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 778874011, now seen corresponding path program 17 times [2021-12-22 10:40:28,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:28,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474457270] [2021-12-22 10:40:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:28,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 408 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:28,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:28,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474457270] [2021-12-22 10:40:28,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474457270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:28,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431484468] [2021-12-22 10:40:28,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 10:40:28,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:28,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:28,955 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:28,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 10:40:29,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-22 10:40:29,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:29,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-22 10:40:29,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:29,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:29,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431484468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:29,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:29,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2021-12-22 10:40:29,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817676789] [2021-12-22 10:40:29,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:29,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-22 10:40:29,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:29,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-22 10:40:29,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=2106, Unknown=0, NotChecked=0, Total=2756 [2021-12-22 10:40:29,986 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:30,512 INFO L93 Difference]: Finished difference Result 295 states and 332 transitions. [2021-12-22 10:40:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-22 10:40:30,512 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 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 100 [2021-12-22 10:40:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:30,513 INFO L225 Difference]: With dead ends: 295 [2021-12-22 10:40:30,513 INFO L226 Difference]: Without dead ends: 169 [2021-12-22 10:40:30,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1721, Invalid=5251, Unknown=0, NotChecked=0, Total=6972 [2021-12-22 10:40:30,516 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 221 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:30,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 466 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:40:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-22 10:40:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 105. [2021-12-22 10:40:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2021-12-22 10:40:30,526 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 100 [2021-12-22 10:40:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:30,527 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2021-12-22 10:40:30,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2021-12-22 10:40:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-22 10:40:30,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:30,528 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:30,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:30,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:30,749 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash -706040923, now seen corresponding path program 18 times [2021-12-22 10:40:30,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:30,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274456018] [2021-12-22 10:40:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:30,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 240 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:30,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274456018] [2021-12-22 10:40:30,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274456018] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954065650] [2021-12-22 10:40:30,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 10:40:30,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:30,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:30,944 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:40:30,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-22 10:40:31,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-22 10:40:31,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-22 10:40:31,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:31,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:31,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954065650] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:31,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:31,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 23 [2021-12-22 10:40:31,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178282555] [2021-12-22 10:40:31,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:31,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 10:40:31,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 10:40:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2021-12-22 10:40:31,288 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:31,502 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2021-12-22 10:40:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-22 10:40:31,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 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 104 [2021-12-22 10:40:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:31,503 INFO L225 Difference]: With dead ends: 122 [2021-12-22 10:40:31,504 INFO L226 Difference]: Without dead ends: 120 [2021-12-22 10:40:31,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=617, Invalid=1105, Unknown=0, NotChecked=0, Total=1722 [2021-12-22 10:40:31,504 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 116 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:31,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 163 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-22 10:40:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2021-12-22 10:40:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2021-12-22 10:40:31,511 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 104 [2021-12-22 10:40:31,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:31,511 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2021-12-22 10:40:31,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2021-12-22 10:40:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-22 10:40:31,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:31,512 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:31,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:31,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:31,729 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:31,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1006078091, now seen corresponding path program 19 times [2021-12-22 10:40:31,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:31,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122255619] [2021-12-22 10:40:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:31,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 530 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:32,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:32,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122255619] [2021-12-22 10:40:32,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122255619] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:32,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303877776] [2021-12-22 10:40:32,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 10:40:32,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:32,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:32,184 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) [2021-12-22 10:40:32,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-22 10:40:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:32,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-22 10:40:32,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:40:32,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:40:33,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303877776] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:33,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:33,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 56 [2021-12-22 10:40:33,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255140691] [2021-12-22 10:40:33,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:33,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-22 10:40:33,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-22 10:40:33,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=2374, Unknown=0, NotChecked=0, Total=3080 [2021-12-22 10:40:33,056 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:33,479 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2021-12-22 10:40:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-22 10:40:33,479 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 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 112 [2021-12-22 10:40:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:33,480 INFO L225 Difference]: With dead ends: 256 [2021-12-22 10:40:33,480 INFO L226 Difference]: Without dead ends: 183 [2021-12-22 10:40:33,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1320, Invalid=3936, Unknown=0, NotChecked=0, Total=5256 [2021-12-22 10:40:33,481 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 288 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:33,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 307 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:40:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-22 10:40:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2021-12-22 10:40:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2021-12-22 10:40:33,491 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 112 [2021-12-22 10:40:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:33,491 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2021-12-22 10:40:33,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2021-12-22 10:40:33,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-22 10:40:33,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:33,492 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:33,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:33,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:33,710 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:33,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1154118448, now seen corresponding path program 20 times [2021-12-22 10:40:33,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:33,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140211184] [2021-12-22 10:40:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:33,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 530 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:34,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:34,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140211184] [2021-12-22 10:40:34,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140211184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:34,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101470533] [2021-12-22 10:40:34,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:40:34,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:34,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:34,168 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) [2021-12-22 10:40:34,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-22 10:40:34,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:40:34,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:34,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-22 10:40:34,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:34,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:35,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101470533] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:35,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:35,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2021-12-22 10:40:35,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923412388] [2021-12-22 10:40:35,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:35,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-22 10:40:35,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:35,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-22 10:40:35,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2021-12-22 10:40:35,092 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:35,509 INFO L93 Difference]: Finished difference Result 264 states and 304 transitions. [2021-12-22 10:40:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-22 10:40:35,510 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 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 114 [2021-12-22 10:40:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:35,510 INFO L225 Difference]: With dead ends: 264 [2021-12-22 10:40:35,510 INFO L226 Difference]: Without dead ends: 189 [2021-12-22 10:40:35,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2021-12-22 10:40:35,512 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 248 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:35,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 436 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:40:35,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-22 10:40:35,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2021-12-22 10:40:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2021-12-22 10:40:35,519 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 114 [2021-12-22 10:40:35,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:35,519 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2021-12-22 10:40:35,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2021-12-22 10:40:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 10:40:35,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:35,520 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:35,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:35,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-22 10:40:35,738 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:35,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1686980757, now seen corresponding path program 21 times [2021-12-22 10:40:35,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:35,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265452621] [2021-12-22 10:40:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:35,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 306 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:35,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:35,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265452621] [2021-12-22 10:40:35,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265452621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:35,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245901820] [2021-12-22 10:40:35,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:40:35,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:35,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:35,934 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) [2021-12-22 10:40:35,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-22 10:40:36,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-22 10:40:36,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:36,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-22 10:40:36,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:36,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:36,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245901820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:36,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:36,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 25 [2021-12-22 10:40:36,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694922648] [2021-12-22 10:40:36,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:36,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 10:40:36,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:36,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 10:40:36,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-12-22 10:40:36,339 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:36,614 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2021-12-22 10:40:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-22 10:40:36,614 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 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 116 [2021-12-22 10:40:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:36,615 INFO L225 Difference]: With dead ends: 134 [2021-12-22 10:40:36,615 INFO L226 Difference]: Without dead ends: 132 [2021-12-22 10:40:36,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=744, Invalid=1326, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 10:40:36,616 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:36,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 207 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-22 10:40:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2021-12-22 10:40:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-12-22 10:40:36,624 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 116 [2021-12-22 10:40:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:36,624 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-12-22 10:40:36,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-12-22 10:40:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-22 10:40:36,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:36,625 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:36,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:36,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-22 10:40:36,842 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:36,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:36,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1134152325, now seen corresponding path program 22 times [2021-12-22 10:40:36,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:36,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633617760] [2021-12-22 10:40:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:36,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 668 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:37,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633617760] [2021-12-22 10:40:37,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633617760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765792146] [2021-12-22 10:40:37,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 10:40:37,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:37,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:37,325 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) [2021-12-22 10:40:37,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-22 10:40:37,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 10:40:37,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:37,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-22 10:40:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:38,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:38,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765792146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:38,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:38,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2021-12-22 10:40:38,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51349564] [2021-12-22 10:40:38,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:38,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-22 10:40:38,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-22 10:40:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=3190, Unknown=0, NotChecked=0, Total=4160 [2021-12-22 10:40:38,403 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:39,072 INFO L93 Difference]: Finished difference Result 367 states and 412 transitions. [2021-12-22 10:40:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-22 10:40:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 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 124 [2021-12-22 10:40:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:39,073 INFO L225 Difference]: With dead ends: 367 [2021-12-22 10:40:39,073 INFO L226 Difference]: Without dead ends: 209 [2021-12-22 10:40:39,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2629, Invalid=8083, Unknown=0, NotChecked=0, Total=10712 [2021-12-22 10:40:39,074 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 385 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:39,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 531 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:40:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-22 10:40:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2021-12-22 10:40:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2021-12-22 10:40:39,086 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 124 [2021-12-22 10:40:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:39,087 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2021-12-22 10:40:39,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2021-12-22 10:40:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-22 10:40:39,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:39,088 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:39,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:39,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:39,305 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1132082821, now seen corresponding path program 23 times [2021-12-22 10:40:39,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:39,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373183639] [2021-12-22 10:40:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:39,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 380 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:39,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:39,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373183639] [2021-12-22 10:40:39,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373183639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:39,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468779170] [2021-12-22 10:40:39,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 10:40:39,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:39,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:39,564 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) [2021-12-22 10:40:39,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-22 10:40:39,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-12-22 10:40:39,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:39,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-22 10:40:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:39,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:40,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468779170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:40,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:40,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 27 [2021-12-22 10:40:40,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447133911] [2021-12-22 10:40:40,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:40,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 10:40:40,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:40,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 10:40:40,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-12-22 10:40:40,132 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:40,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:40,430 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2021-12-22 10:40:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 10:40:40,431 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 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 128 [2021-12-22 10:40:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:40,431 INFO L225 Difference]: With dead ends: 146 [2021-12-22 10:40:40,431 INFO L226 Difference]: Without dead ends: 144 [2021-12-22 10:40:40,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=883, Invalid=1567, Unknown=0, NotChecked=0, Total=2450 [2021-12-22 10:40:40,432 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 98 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:40,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 234 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-22 10:40:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2021-12-22 10:40:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2021-12-22 10:40:40,440 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 128 [2021-12-22 10:40:40,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:40,441 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2021-12-22 10:40:40,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2021-12-22 10:40:40,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 10:40:40,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:40,442 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:40,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:40,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:40,659 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1245590379, now seen corresponding path program 24 times [2021-12-22 10:40:40,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:40,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063728166] [2021-12-22 10:40:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:40,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 822 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:41,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:41,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063728166] [2021-12-22 10:40:41,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063728166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:41,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759694122] [2021-12-22 10:40:41,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 10:40:41,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:41,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:41,143 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) [2021-12-22 10:40:41,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-22 10:40:41,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-22 10:40:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:41,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-22 10:40:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:41,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:42,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759694122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:42,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:42,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 71 [2021-12-22 10:40:42,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073036378] [2021-12-22 10:40:42,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:42,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-22 10:40:42,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-22 10:40:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=3816, Unknown=0, NotChecked=0, Total=4970 [2021-12-22 10:40:42,040 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:42,922 INFO L93 Difference]: Finished difference Result 403 states and 452 transitions. [2021-12-22 10:40:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-22 10:40:42,923 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 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 136 [2021-12-22 10:40:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:42,924 INFO L225 Difference]: With dead ends: 403 [2021-12-22 10:40:42,924 INFO L226 Difference]: Without dead ends: 229 [2021-12-22 10:40:42,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3155, Invalid=9727, Unknown=0, NotChecked=0, Total=12882 [2021-12-22 10:40:42,925 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 358 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:42,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 635 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 10:40:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-22 10:40:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 141. [2021-12-22 10:40:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2021-12-22 10:40:42,934 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 136 [2021-12-22 10:40:42,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:42,934 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2021-12-22 10:40:42,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2021-12-22 10:40:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-22 10:40:42,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:42,935 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:42,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:43,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-22 10:40:43,152 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1485376139, now seen corresponding path program 25 times [2021-12-22 10:40:43,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:43,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036013054] [2021-12-22 10:40:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:43,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 462 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:43,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:43,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036013054] [2021-12-22 10:40:43,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036013054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:43,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135884280] [2021-12-22 10:40:43,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 10:40:43,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:43,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:43,446 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) [2021-12-22 10:40:43,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-22 10:40:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:43,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-22 10:40:43,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:43,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:44,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135884280] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:44,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:44,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 29 [2021-12-22 10:40:44,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757823433] [2021-12-22 10:40:44,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:44,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 10:40:44,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 10:40:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2021-12-22 10:40:44,110 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:44,405 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2021-12-22 10:40:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-22 10:40:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 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 140 [2021-12-22 10:40:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:44,406 INFO L225 Difference]: With dead ends: 158 [2021-12-22 10:40:44,406 INFO L226 Difference]: Without dead ends: 156 [2021-12-22 10:40:44,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1034, Invalid=1828, Unknown=0, NotChecked=0, Total=2862 [2021-12-22 10:40:44,407 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 184 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:44,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 235 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 10:40:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-22 10:40:44,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2021-12-22 10:40:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2021-12-22 10:40:44,417 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 140 [2021-12-22 10:40:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:44,417 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2021-12-22 10:40:44,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2021-12-22 10:40:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-22 10:40:44,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:44,418 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:44,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:44,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-22 10:40:44,636 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1127939493, now seen corresponding path program 26 times [2021-12-22 10:40:44,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:44,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455307568] [2021-12-22 10:40:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:44,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 992 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:45,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455307568] [2021-12-22 10:40:45,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455307568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441110342] [2021-12-22 10:40:45,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:40:45,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:45,316 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) [2021-12-22 10:40:45,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-22 10:40:45,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:40:45,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-22 10:40:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:40:46,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:40:46,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441110342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:46,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:46,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 74 [2021-12-22 10:40:46,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239292064] [2021-12-22 10:40:46,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:46,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-22 10:40:46,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:46,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-22 10:40:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=4174, Unknown=0, NotChecked=0, Total=5402 [2021-12-22 10:40:46,636 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:47,175 INFO L93 Difference]: Finished difference Result 340 states and 390 transitions. [2021-12-22 10:40:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 10:40:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 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 148 [2021-12-22 10:40:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:47,176 INFO L225 Difference]: With dead ends: 340 [2021-12-22 10:40:47,177 INFO L226 Difference]: Without dead ends: 243 [2021-12-22 10:40:47,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2334, Invalid=6978, Unknown=0, NotChecked=0, Total=9312 [2021-12-22 10:40:47,178 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 322 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:47,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 556 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:40:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-22 10:40:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 151. [2021-12-22 10:40:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2021-12-22 10:40:47,188 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 148 [2021-12-22 10:40:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:47,189 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2021-12-22 10:40:47,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2021-12-22 10:40:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-22 10:40:47,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:47,190 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:47,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:47,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-22 10:40:47,407 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:47,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1461075584, now seen corresponding path program 27 times [2021-12-22 10:40:47,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:47,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116537083] [2021-12-22 10:40:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:47,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 992 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:47,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:47,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116537083] [2021-12-22 10:40:47,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116537083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:47,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166621549] [2021-12-22 10:40:47,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:40:47,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:47,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:47,949 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) [2021-12-22 10:40:47,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-22 10:40:48,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-22 10:40:48,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-22 10:40:48,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 552 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:48,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 552 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:48,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166621549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:48,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:48,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27, 27] total 75 [2021-12-22 10:40:48,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817004928] [2021-12-22 10:40:48,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:48,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-22 10:40:48,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:48,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-22 10:40:48,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=4598, Unknown=0, NotChecked=0, Total=5550 [2021-12-22 10:40:48,870 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:50,563 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2021-12-22 10:40:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-22 10:40:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 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 150 [2021-12-22 10:40:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:50,564 INFO L225 Difference]: With dead ends: 355 [2021-12-22 10:40:50,564 INFO L226 Difference]: Without dead ends: 256 [2021-12-22 10:40:50,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9588 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4746, Invalid=24324, Unknown=0, NotChecked=0, Total=29070 [2021-12-22 10:40:50,567 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 613 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:50,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 370 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 10:40:50,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-22 10:40:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 157. [2021-12-22 10:40:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2021-12-22 10:40:50,579 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 150 [2021-12-22 10:40:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:50,580 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2021-12-22 10:40:50,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2021-12-22 10:40:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-22 10:40:50,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:50,581 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:50,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:50,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:50,798 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:50,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:50,798 INFO L85 PathProgramCache]: Analyzing trace with hash -897123176, now seen corresponding path program 28 times [2021-12-22 10:40:50,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:50,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230726140] [2021-12-22 10:40:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:50,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 1083 proven. 669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:51,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:51,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230726140] [2021-12-22 10:40:51,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230726140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:51,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714930624] [2021-12-22 10:40:51,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 10:40:51,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:51,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:51,573 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) [2021-12-22 10:40:51,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-22 10:40:51,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 10:40:51,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:51,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-22 10:40:51,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 600 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:52,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 600 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:52,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714930624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:52,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:52,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 28, 28] total 78 [2021-12-22 10:40:52,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092710740] [2021-12-22 10:40:52,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:52,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-22 10:40:52,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:52,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-22 10:40:52,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=4977, Unknown=0, NotChecked=0, Total=6006 [2021-12-22 10:40:52,722 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 78 states, 78 states have (on average 3.9743589743589745) internal successors, (310), 78 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:54,636 INFO L93 Difference]: Finished difference Result 369 states and 424 transitions. [2021-12-22 10:40:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-22 10:40:54,637 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.9743589743589745) internal successors, (310), 78 states have internal predecessors, (310), 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 156 [2021-12-22 10:40:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:54,638 INFO L225 Difference]: With dead ends: 369 [2021-12-22 10:40:54,638 INFO L226 Difference]: Without dead ends: 266 [2021-12-22 10:40:54,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10425 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5131, Invalid=26375, Unknown=0, NotChecked=0, Total=31506 [2021-12-22 10:40:54,640 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 610 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:54,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 438 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 10:40:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-22 10:40:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 163. [2021-12-22 10:40:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 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) [2021-12-22 10:40:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2021-12-22 10:40:54,653 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 156 [2021-12-22 10:40:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:54,653 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2021-12-22 10:40:54,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.9743589743589745) internal successors, (310), 78 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2021-12-22 10:40:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 10:40:54,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:54,654 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:54,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:54,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:54,868 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:54,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:54,869 INFO L85 PathProgramCache]: Analyzing trace with hash -548974864, now seen corresponding path program 29 times [2021-12-22 10:40:54,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:54,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588640670] [2021-12-22 10:40:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:54,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1178 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:55,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:55,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588640670] [2021-12-22 10:40:55,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588640670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:55,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214017617] [2021-12-22 10:40:55,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 10:40:55,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:55,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:55,666 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) [2021-12-22 10:40:55,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-22 10:40:55,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-22 10:40:55,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:55,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-22 10:40:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1250 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:56,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1250 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:57,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214017617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:57,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:57,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 82 [2021-12-22 10:40:57,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705649318] [2021-12-22 10:40:57,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:57,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-22 10:40:57,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:57,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-22 10:40:57,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1515, Invalid=5127, Unknown=0, NotChecked=0, Total=6642 [2021-12-22 10:40:57,095 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 82 states, 82 states have (on average 3.292682926829268) internal successors, (270), 82 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:57,595 INFO L93 Difference]: Finished difference Result 376 states and 432 transitions. [2021-12-22 10:40:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-22 10:40:57,596 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.292682926829268) internal successors, (270), 82 states have internal predecessors, (270), 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 162 [2021-12-22 10:40:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:57,598 INFO L225 Difference]: With dead ends: 376 [2021-12-22 10:40:57,599 INFO L226 Difference]: Without dead ends: 269 [2021-12-22 10:40:57,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2921, Invalid=8635, Unknown=0, NotChecked=0, Total=11556 [2021-12-22 10:40:57,600 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 424 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:57,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 596 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:40:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-22 10:40:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 165. [2021-12-22 10:40:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2021-12-22 10:40:57,619 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 162 [2021-12-22 10:40:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:57,619 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2021-12-22 10:40:57,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.292682926829268) internal successors, (270), 82 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:40:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2021-12-22 10:40:57,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-22 10:40:57,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:57,620 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:57,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-22 10:40:57,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:57,838 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash 24503893, now seen corresponding path program 30 times [2021-12-22 10:40:57,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:57,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322380390] [2021-12-22 10:40:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:57,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:40:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 650 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:58,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:40:58,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322380390] [2021-12-22 10:40:58,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322380390] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:40:58,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524005793] [2021-12-22 10:40:58,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 10:40:58,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:40:58,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:40:58,128 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) [2021-12-22 10:40:58,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-22 10:40:58,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-12-22 10:40:58,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:40:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-22 10:40:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:40:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:58,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:40:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:40:58,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524005793] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:40:58,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:40:58,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 33 [2021-12-22 10:40:58,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861978081] [2021-12-22 10:40:58,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:40:58,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 10:40:58,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:40:58,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 10:40:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 10:40:58,773 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 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) [2021-12-22 10:40:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:40:59,309 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2021-12-22 10:40:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-22 10:40:59,310 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 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 164 [2021-12-22 10:40:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:40:59,311 INFO L225 Difference]: With dead ends: 182 [2021-12-22 10:40:59,311 INFO L226 Difference]: Without dead ends: 180 [2021-12-22 10:40:59,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1372, Invalid=2410, Unknown=0, NotChecked=0, Total=3782 [2021-12-22 10:40:59,312 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 178 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:40:59,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 261 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:40:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-22 10:40:59,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2021-12-22 10:40:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 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) [2021-12-22 10:40:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2021-12-22 10:40:59,328 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 164 [2021-12-22 10:40:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:40:59,329 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2021-12-22 10:40:59,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 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) [2021-12-22 10:40:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2021-12-22 10:40:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-22 10:40:59,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:40:59,330 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:40:59,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-22 10:40:59,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-22 10:40:59,554 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:40:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:40:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash 481628987, now seen corresponding path program 31 times [2021-12-22 10:40:59,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:40:59,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141532934] [2021-12-22 10:40:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:40:59,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:40:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:41:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1380 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:00,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:41:00,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141532934] [2021-12-22 10:41:00,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141532934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:41:00,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535010189] [2021-12-22 10:41:00,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 10:41:00,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:41:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:41:00,419 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) [2021-12-22 10:41:00,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-22 10:41:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:41:00,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-22 10:41:00,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:41:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:41:01,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:41:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:41:01,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535010189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:41:01,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:41:01,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 86 [2021-12-22 10:41:01,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524308277] [2021-12-22 10:41:01,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:41:01,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-22 10:41:01,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:41:01,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-22 10:41:01,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1656, Invalid=5654, Unknown=0, NotChecked=0, Total=7310 [2021-12-22 10:41:01,943 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:41:02,641 INFO L93 Difference]: Finished difference Result 396 states and 454 transitions. [2021-12-22 10:41:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-22 10:41:02,655 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 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 172 [2021-12-22 10:41:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:41:02,656 INFO L225 Difference]: With dead ends: 396 [2021-12-22 10:41:02,656 INFO L226 Difference]: Without dead ends: 283 [2021-12-22 10:41:02,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2822 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3170, Invalid=9486, Unknown=0, NotChecked=0, Total=12656 [2021-12-22 10:41:02,658 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 371 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 10:41:02,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 622 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 10:41:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-22 10:41:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 175. [2021-12-22 10:41:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2021-12-22 10:41:02,672 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 172 [2021-12-22 10:41:02,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:41:02,672 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2021-12-22 10:41:02,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:02,672 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2021-12-22 10:41:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-22 10:41:02,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:41:02,673 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:41:02,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-22 10:41:02,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:41:02,891 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:41:02,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:41:02,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2129825696, now seen corresponding path program 32 times [2021-12-22 10:41:02,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:41:02,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375333793] [2021-12-22 10:41:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:41:02,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:41:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:41:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1380 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:03,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:41:03,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375333793] [2021-12-22 10:41:03,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375333793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:41:03,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669547180] [2021-12-22 10:41:03,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:41:03,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:41:03,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:41:03,631 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) [2021-12-22 10:41:03,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-22 10:41:03,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:41:03,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:41:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-22 10:41:03,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:41:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 756 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:04,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:41:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 756 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:04,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669547180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:41:04,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:41:04,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 31, 31] total 87 [2021-12-22 10:41:04,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059997066] [2021-12-22 10:41:04,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:41:04,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-22 10:41:04,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:41:04,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-22 10:41:04,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=6204, Unknown=0, NotChecked=0, Total=7482 [2021-12-22 10:41:04,609 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:41:06,437 INFO L93 Difference]: Finished difference Result 411 states and 472 transitions. [2021-12-22 10:41:06,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-22 10:41:06,438 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 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 174 [2021-12-22 10:41:06,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:41:06,439 INFO L225 Difference]: With dead ends: 411 [2021-12-22 10:41:06,439 INFO L226 Difference]: Without dead ends: 296 [2021-12-22 10:41:06,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13146 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6376, Invalid=33026, Unknown=0, NotChecked=0, Total=39402 [2021-12-22 10:41:06,443 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 633 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:41:06,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 479 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 10:41:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-22 10:41:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 181. [2021-12-22 10:41:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2021-12-22 10:41:06,494 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 174 [2021-12-22 10:41:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:41:06,494 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2021-12-22 10:41:06,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.9770114942528734) internal successors, (346), 87 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2021-12-22 10:41:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-22 10:41:06,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:41:06,496 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:41:06,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-22 10:41:06,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:41:06,713 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:41:06,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:41:06,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1983684472, now seen corresponding path program 33 times [2021-12-22 10:41:06,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:41:06,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772936030] [2021-12-22 10:41:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:41:06,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:41:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:41:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1487 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:07,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:41:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772936030] [2021-12-22 10:41:07,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772936030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:41:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443702758] [2021-12-22 10:41:07,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 10:41:07,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:41:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:41:07,405 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) [2021-12-22 10:41:07,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-22 10:41:07,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-12-22 10:41:07,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:41:07,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-22 10:41:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:41:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 812 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:08,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:41:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 812 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:08,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443702758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:41:08,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:41:08,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 32, 32] total 90 [2021-12-22 10:41:08,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386652368] [2021-12-22 10:41:08,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:41:08,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-22 10:41:08,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:41:08,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-22 10:41:08,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1367, Invalid=6643, Unknown=0, NotChecked=0, Total=8010 [2021-12-22 10:41:08,661 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 90 states, 90 states have (on average 3.977777777777778) internal successors, (358), 90 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:41:10,575 INFO L93 Difference]: Finished difference Result 425 states and 488 transitions. [2021-12-22 10:41:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-22 10:41:10,575 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.977777777777778) internal successors, (358), 90 states have internal predecessors, (358), 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 180 [2021-12-22 10:41:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:41:10,576 INFO L225 Difference]: With dead ends: 425 [2021-12-22 10:41:10,576 INFO L226 Difference]: Without dead ends: 306 [2021-12-22 10:41:10,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14123 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6821, Invalid=35409, Unknown=0, NotChecked=0, Total=42230 [2021-12-22 10:41:10,579 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 632 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 10:41:10,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 447 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 10:41:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-12-22 10:41:10,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 187. [2021-12-22 10:41:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2021-12-22 10:41:10,596 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 180 [2021-12-22 10:41:10,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:41:10,596 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2021-12-22 10:41:10,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.977777777777778) internal successors, (358), 90 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2021-12-22 10:41:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-22 10:41:10,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:41:10,597 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:41:10,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-22 10:41:10,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-22 10:41:10,815 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:41:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:41:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2064523984, now seen corresponding path program 34 times [2021-12-22 10:41:10,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:41:10,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955061934] [2021-12-22 10:41:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:41:10,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:41:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:41:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 1598 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:11,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:41:11,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955061934] [2021-12-22 10:41:11,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955061934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:41:11,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748530634] [2021-12-22 10:41:11,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 10:41:11,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:41:11,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:41:11,553 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:41:11,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-22 10:41:11,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 10:41:11,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:41:11,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-22 10:41:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:41:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 870 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:12,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:41:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 870 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:12,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748530634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:41:12,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:41:12,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 33, 33] total 93 [2021-12-22 10:41:12,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484872308] [2021-12-22 10:41:12,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:41:12,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-12-22 10:41:12,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:41:12,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-12-22 10:41:12,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1459, Invalid=7097, Unknown=0, NotChecked=0, Total=8556 [2021-12-22 10:41:12,856 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 93 states, 93 states have (on average 3.978494623655914) internal successors, (370), 93 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:41:15,031 INFO L93 Difference]: Finished difference Result 439 states and 504 transitions. [2021-12-22 10:41:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-22 10:41:15,031 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.978494623655914) internal successors, (370), 93 states have internal predecessors, (370), 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 186 [2021-12-22 10:41:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:41:15,032 INFO L225 Difference]: With dead ends: 439 [2021-12-22 10:41:15,032 INFO L226 Difference]: Without dead ends: 316 [2021-12-22 10:41:15,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15135 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7281, Invalid=37875, Unknown=0, NotChecked=0, Total=45156 [2021-12-22 10:41:15,036 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 813 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 10:41:15,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 516 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 10:41:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-22 10:41:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 193. [2021-12-22 10:41:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2021-12-22 10:41:15,088 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 186 [2021-12-22 10:41:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:41:15,088 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2021-12-22 10:41:15,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.978494623655914) internal successors, (370), 93 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2021-12-22 10:41:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-22 10:41:15,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:41:15,089 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:41:15,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-22 10:41:15,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-22 10:41:15,290 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:41:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:41:15,290 INFO L85 PathProgramCache]: Analyzing trace with hash -720065944, now seen corresponding path program 35 times [2021-12-22 10:41:15,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:41:15,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332393323] [2021-12-22 10:41:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:41:15,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:41:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:41:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 1713 proven. 1017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:16,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:41:16,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332393323] [2021-12-22 10:41:16,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332393323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:41:16,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420681075] [2021-12-22 10:41:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 10:41:16,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:41:16,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:41:16,099 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:41:16,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-22 10:41:16,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-12-22 10:41:16,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:41:16,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-22 10:41:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:41:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 1800 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:17,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:41:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 1800 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:17,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420681075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:41:17,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:41:17,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 97 [2021-12-22 10:41:17,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801107004] [2021-12-22 10:41:17,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:41:17,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-22 10:41:17,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:41:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-22 10:41:17,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2115, Invalid=7197, Unknown=0, NotChecked=0, Total=9312 [2021-12-22 10:41:17,718 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 97 states, 97 states have (on average 3.2989690721649483) internal successors, (320), 97 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:41:18,669 INFO L93 Difference]: Finished difference Result 446 states and 512 transitions. [2021-12-22 10:41:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-22 10:41:18,669 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.2989690721649483) internal successors, (320), 97 states have internal predecessors, (320), 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 192 [2021-12-22 10:41:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:41:18,677 INFO L225 Difference]: With dead ends: 446 [2021-12-22 10:41:18,677 INFO L226 Difference]: Without dead ends: 319 [2021-12-22 10:41:18,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3583 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4101, Invalid=12155, Unknown=0, NotChecked=0, Total=16256 [2021-12-22 10:41:18,681 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 415 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:41:18,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 783 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 10:41:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-22 10:41:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2021-12-22 10:41:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2021-12-22 10:41:18,713 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 192 [2021-12-22 10:41:18,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:41:18,713 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2021-12-22 10:41:18,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.2989690721649483) internal successors, (320), 97 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2021-12-22 10:41:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-22 10:41:18,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:41:18,714 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:41:18,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-22 10:41:18,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-22 10:41:18,915 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:41:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:41:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash 12059405, now seen corresponding path program 36 times [2021-12-22 10:41:18,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:41:18,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655058161] [2021-12-22 10:41:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:41:18,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:41:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:41:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 930 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:19,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:41:19,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655058161] [2021-12-22 10:41:19,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655058161] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:41:19,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277784520] [2021-12-22 10:41:19,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 10:41:19,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:41:19,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:41:19,387 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:41:19,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-22 10:41:19,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-12-22 10:41:19,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:41:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-22 10:41:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:41:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:19,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:41:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:20,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277784520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:41:20,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:41:20,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 38 [2021-12-22 10:41:20,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701338377] [2021-12-22 10:41:20,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:41:20,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-22 10:41:20,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:41:20,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-22 10:41:20,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=802, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 10:41:20,040 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:41:20,545 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2021-12-22 10:41:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-22 10:41:20,545 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 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 194 [2021-12-22 10:41:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:41:20,546 INFO L225 Difference]: With dead ends: 212 [2021-12-22 10:41:20,546 INFO L226 Difference]: Without dead ends: 210 [2021-12-22 10:41:20,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1862, Invalid=3250, Unknown=0, NotChecked=0, Total=5112 [2021-12-22 10:41:20,547 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 247 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 10:41:20,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 283 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 10:41:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-22 10:41:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2021-12-22 10:41:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2021-12-22 10:41:20,562 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 194 [2021-12-22 10:41:20,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:41:20,563 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2021-12-22 10:41:20,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:20,563 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2021-12-22 10:41:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-22 10:41:20,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:41:20,564 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:41:20,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-22 10:41:20,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-22 10:41:20,767 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:41:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:41:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash -951388173, now seen corresponding path program 37 times [2021-12-22 10:41:20,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:41:20,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160917336] [2021-12-22 10:41:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:41:20,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:41:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:41:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 1955 proven. 1085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:21,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:41:21,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160917336] [2021-12-22 10:41:21,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160917336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:41:21,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291931106] [2021-12-22 10:41:21,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 10:41:21,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:41:21,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:41:21,613 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:41:21,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-22 10:41:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:41:21,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-22 10:41:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 10:41:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:41:22,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 10:41:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 10:41:23,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291931106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 10:41:23,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 10:41:23,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 101 [2021-12-22 10:41:23,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762768664] [2021-12-22 10:41:23,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 10:41:23,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-22 10:41:23,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 10:41:23,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-22 10:41:23,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2281, Invalid=7819, Unknown=0, NotChecked=0, Total=10100 [2021-12-22 10:41:23,129 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 10:41:24,106 INFO L93 Difference]: Finished difference Result 466 states and 534 transitions. [2021-12-22 10:41:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-22 10:41:24,106 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 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 202 [2021-12-22 10:41:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 10:41:24,107 INFO L225 Difference]: With dead ends: 466 [2021-12-22 10:41:24,107 INFO L226 Difference]: Without dead ends: 333 [2021-12-22 10:41:24,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3907 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4395, Invalid=13161, Unknown=0, NotChecked=0, Total=17556 [2021-12-22 10:41:24,109 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 477 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 10:41:24,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 858 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 10:41:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-22 10:41:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 205. [2021-12-22 10:41:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2021-12-22 10:41:24,125 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 202 [2021-12-22 10:41:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 10:41:24,125 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2021-12-22 10:41:24,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 10:41:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2021-12-22 10:41:24,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-22 10:41:24,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 10:41:24,126 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 10:41:24,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-22 10:41:24,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-22 10:41:24,343 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 10:41:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 10:41:24,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1744337320, now seen corresponding path program 38 times [2021-12-22 10:41:24,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 10:41:24,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818833892] [2021-12-22 10:41:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 10:41:24,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 10:41:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 10:41:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 1955 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 10:41:25,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 10:41:25,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818833892] [2021-12-22 10:41:25,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818833892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 10:41:25,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804882038] [2021-12-22 10:41:25,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 10:41:25,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 10:41:25,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 10:41:25,684 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 10:41:25,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-22 10:41:25,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 10:41:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 10:41:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-22 10:41:25,825 INFO L286 TraceCheckSpWp]: Computing forward predicates...