./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono3_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/Mono3_1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:01:46,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:01:46,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:01:46,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:01:46,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:01:46,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:01:46,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:01:46,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:01:46,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:01:46,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:01:46,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:01:46,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:01:46,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:01:46,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:01:46,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:01:46,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:01:46,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:01:46,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:01:46,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:01:46,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:01:46,637 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:01:46,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:01:46,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:01:46,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:01:46,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:01:46,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:01:46,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:01:46,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:01:46,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:01:46,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:01:46,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:01:46,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:01:46,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:01:46,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:01:46,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:01:46,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:01:46,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:01:46,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:01:46,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:01:46,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:01:46,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:01:46,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:01:46,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:01:46,682 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:01:46,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:01:46,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:01:46,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:01:46,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:01:46,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:01:46,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:01:46,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:01:46,684 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:01:46,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:01:46,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:01:46,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:01:46,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:01:46,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:01:46,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:01:46,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:01:46,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:01:46,686 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:01:46,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:01:46,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:01:46,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:01:46,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:01:46,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:01:46,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:01:46,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:01:46,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:01:46,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:01:46,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:01:46,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:01:46,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:01:46,688 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:01:46,689 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:01:46,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:01:46,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0756a7f5fb7c80ee6b59c75ec6cf9015a96d2c6a2bbe84a426dbe33a7087e683 [2022-07-12 04:01:46,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:01:46,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:01:46,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:01:46,916 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:01:46,916 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:01:46,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2022-07-12 04:01:46,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301e85412/457311d1d4df454aa4cc6d666cee9fdd/FLAG7ab011acd [2022-07-12 04:01:47,324 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:01:47,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2022-07-12 04:01:47,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301e85412/457311d1d4df454aa4cc6d666cee9fdd/FLAG7ab011acd [2022-07-12 04:01:47,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/301e85412/457311d1d4df454aa4cc6d666cee9fdd [2022-07-12 04:01:47,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:01:47,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:01:47,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:01:47,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:01:47,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:01:47,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ee43a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47, skipping insertion in model container [2022-07-12 04:01:47,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:01:47,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:01:47,886 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2022-07-12 04:01:47,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:01:47,900 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:01:47,909 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono3_1.c[311,324] [2022-07-12 04:01:47,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:01:47,920 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:01:47,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47 WrapperNode [2022-07-12 04:01:47,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:01:47,921 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:01:47,921 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:01:47,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:01:47,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,943 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-07-12 04:01:47,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:01:47,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:01:47,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:01:47,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:01:47,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:01:47,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:01:47,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:01:47,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:01:47,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (1/1) ... [2022-07-12 04:01:47,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:01:47,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:47,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 04:01:47,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 04:01:48,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:01:48,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:01:48,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:01:48,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:01:48,057 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:01:48,058 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:01:48,127 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:01:48,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:01:48,132 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 04:01:48,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:01:48 BoogieIcfgContainer [2022-07-12 04:01:48,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:01:48,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:01:48,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:01:48,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:01:48,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:01:47" (1/3) ... [2022-07-12 04:01:48,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4e82f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:01:48, skipping insertion in model container [2022-07-12 04:01:48,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:01:47" (2/3) ... [2022-07-12 04:01:48,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4e82f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:01:48, skipping insertion in model container [2022-07-12 04:01:48,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:01:48" (3/3) ... [2022-07-12 04:01:48,153 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2022-07-12 04:01:48,165 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:01:48,166 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:01:48,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:01:48,229 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@601795e2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c62f335 [2022-07-12 04:01:48,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:01:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) [2022-07-12 04:01:48,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 04:01:48,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:48,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 04:01:48,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:48,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:48,257 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2022-07-12 04:01:48,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:48,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347155604] [2022-07-12 04:01:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:48,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:48,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:48,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347155604] [2022-07-12 04:01:48,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347155604] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:01:48,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:01:48,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 04:01:48,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862964355] [2022-07-12 04:01:48,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:01:48,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 04:01:48,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 04:01:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:01:48,389 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:48,400 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-07-12 04:01:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 04:01:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-07-12 04:01:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:48,407 INFO L225 Difference]: With dead ends: 21 [2022-07-12 04:01:48,408 INFO L226 Difference]: Without dead ends: 9 [2022-07-12 04:01:48,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:01:48,415 INFO L413 NwaCegarLoop]: 14 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, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:48,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:01:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-12 04:01:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-07-12 04:01:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2022-07-12 04:01:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-07-12 04:01:48,436 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-07-12 04:01:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:48,436 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-07-12 04:01:48,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-07-12 04:01:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 04:01:48,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:48,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 04:01:48,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:01:48,437 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:48,438 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2022-07-12 04:01:48,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:48,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350460836] [2022-07-12 04:01:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:48,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:48,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:48,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350460836] [2022-07-12 04:01:48,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350460836] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:01:48,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:01:48,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 04:01:48,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882659538] [2022-07-12 04:01:48,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:01:48,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 04:01:48,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:48,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 04:01:48,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:01:48,479 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:48,499 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-07-12 04:01:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 04:01:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-07-12 04:01:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:48,500 INFO L225 Difference]: With dead ends: 19 [2022-07-12 04:01:48,500 INFO L226 Difference]: Without dead ends: 12 [2022-07-12 04:01:48,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 04:01:48,501 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:48,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:01:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-12 04:01:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-07-12 04:01:48,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2022-07-12 04:01:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-07-12 04:01:48,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-07-12 04:01:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:48,511 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-07-12 04:01:48,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-07-12 04:01:48,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 04:01:48,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:48,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:48,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 04:01:48,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:48,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:48,513 INFO L85 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2022-07-12 04:01:48,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:48,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019799566] [2022-07-12 04:01:48,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:48,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019799566] [2022-07-12 04:01:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019799566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267804202] [2022-07-12 04:01:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:48,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:48,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:48,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:01:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:48,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 04:01:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:48,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:48,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267804202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:48,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:48,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 7] total 12 [2022-07-12 04:01:48,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502385585] [2022-07-12 04:01:48,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:48,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 04:01:48,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:48,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 04:01:48,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:01:48,917 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:49,116 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-07-12 04:01:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 04:01:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-12 04:01:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:49,118 INFO L225 Difference]: With dead ends: 31 [2022-07-12 04:01:49,118 INFO L226 Difference]: Without dead ends: 20 [2022-07-12 04:01:49,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:01:49,120 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:49,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:01:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-12 04:01:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-07-12 04:01:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-07-12 04:01:49,130 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2022-07-12 04:01:49,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:49,130 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-07-12 04:01:49,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-07-12 04:01:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 04:01:49,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:49,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:49,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 04:01:49,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:49,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:49,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash 329880921, now seen corresponding path program 1 times [2022-07-12 04:01:49,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:49,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194427194] [2022-07-12 04:01:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:49,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:01:49,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:49,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194427194] [2022-07-12 04:01:49,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194427194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:49,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208815630] [2022-07-12 04:01:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:49,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:49,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:49,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:49,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:01:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:49,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 04:01:49,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:01:49,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:01:49,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208815630] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:49,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:49,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-07-12 04:01:49,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999563856] [2022-07-12 04:01:49,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:49,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 04:01:49,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:49,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 04:01:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:01:49,572 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:49,790 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-07-12 04:01:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 04:01:49,790 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-12 04:01:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:49,790 INFO L225 Difference]: With dead ends: 56 [2022-07-12 04:01:49,790 INFO L226 Difference]: Without dead ends: 43 [2022-07-12 04:01:49,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-07-12 04:01:49,791 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:49,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:01:49,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-12 04:01:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-07-12 04:01:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-12 04:01:49,798 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2022-07-12 04:01:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:49,798 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-12 04:01:49,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-12 04:01:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-12 04:01:49,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:49,799 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:49,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:50,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-12 04:01:50,004 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:50,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1412883461, now seen corresponding path program 2 times [2022-07-12 04:01:50,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:50,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432069686] [2022-07-12 04:01:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:50,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:01:50,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:50,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432069686] [2022-07-12 04:01:50,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432069686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:50,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506191331] [2022-07-12 04:01:50,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:01:50,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:50,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:50,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:50,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:01:50,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:01:50,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:50,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 04:01:50,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 04:01:50,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 04:01:50,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506191331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:50,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:50,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-07-12 04:01:50,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036326615] [2022-07-12 04:01:50,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:50,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 04:01:50,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:50,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 04:01:50,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-07-12 04:01:50,294 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:50,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:50,659 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2022-07-12 04:01:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 04:01:50,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 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 21 [2022-07-12 04:01:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:50,660 INFO L225 Difference]: With dead ends: 111 [2022-07-12 04:01:50,660 INFO L226 Difference]: Without dead ends: 81 [2022-07-12 04:01:50,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2022-07-12 04:01:50,661 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:50,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 60 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:01:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-12 04:01:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-07-12 04:01:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-07-12 04:01:50,669 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 21 [2022-07-12 04:01:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:50,669 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-12 04:01:50,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-07-12 04:01:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 04:01:50,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:50,670 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:50,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:01:50,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:50,884 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash -922085543, now seen corresponding path program 3 times [2022-07-12 04:01:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:50,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356467545] [2022-07-12 04:01:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:50,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 04:01:50,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:50,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356467545] [2022-07-12 04:01:50,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356467545] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:50,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772413406] [2022-07-12 04:01:50,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:01:50,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:50,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:50,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:50,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:01:51,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-12 04:01:51,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:51,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 04:01:51,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:01:51,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:01:51,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772413406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:51,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:51,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-07-12 04:01:51,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918159175] [2022-07-12 04:01:51,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:51,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 04:01:51,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:51,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 04:01:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:01:51,379 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:01:53,455 INFO L93 Difference]: Finished difference Result 115 states and 156 transitions. [2022-07-12 04:01:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 04:01:53,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-12 04:01:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:01:53,457 INFO L225 Difference]: With dead ends: 115 [2022-07-12 04:01:53,457 INFO L226 Difference]: Without dead ends: 77 [2022-07-12 04:01:53,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2022-07-12 04:01:53,458 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:01:53,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 34 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:01:53,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-12 04:01:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 52. [2022-07-12 04:01:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 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) [2022-07-12 04:01:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-07-12 04:01:53,467 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 27 [2022-07-12 04:01:53,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:01:53,467 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-07-12 04:01:53,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:01:53,467 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-07-12 04:01:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 04:01:53,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:01:53,469 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 9, 6, 1, 1, 1, 1, 1, 1] [2022-07-12 04:01:53,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 04:01:53,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:53,673 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:01:53,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:01:53,674 INFO L85 PathProgramCache]: Analyzing trace with hash -522566631, now seen corresponding path program 4 times [2022-07-12 04:01:53,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:01:53,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386569963] [2022-07-12 04:01:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:01:53,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:01:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:01:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 173 proven. 57 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 04:01:53,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:01:53,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386569963] [2022-07-12 04:01:53,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386569963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:01:53,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252085344] [2022-07-12 04:01:53,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:01:53,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:01:53,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:01:53,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:01:53,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:01:53,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:01:53,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:01:53,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 04:01:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:01:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 04:01:54,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:01:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 04:01:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252085344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:01:54,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:01:54,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-07-12 04:01:54,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358622173] [2022-07-12 04:01:54,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:01:54,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 04:01:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:01:54,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 04:01:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-07-12 04:01:54,422 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:05,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:05,874 INFO L93 Difference]: Finished difference Result 1187 states and 1366 transitions. [2022-07-12 04:02:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-07-12 04:02:05,875 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-12 04:02:05,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:05,880 INFO L225 Difference]: With dead ends: 1187 [2022-07-12 04:02:05,880 INFO L226 Difference]: Without dead ends: 1152 [2022-07-12 04:02:05,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3209, Invalid=15151, Unknown=0, NotChecked=0, Total=18360 [2022-07-12 04:02:05,889 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:05,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 101 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-12 04:02:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-07-12 04:02:05,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 814. [2022-07-12 04:02:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 1.1832718327183271) internal successors, (962), 813 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 962 transitions. [2022-07-12 04:02:05,998 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 962 transitions. Word has length 51 [2022-07-12 04:02:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:05,999 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 962 transitions. [2022-07-12 04:02:05,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 962 transitions. [2022-07-12 04:02:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-12 04:02:06,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:06,012 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 10, 7, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:06,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 04:02:06,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:06,227 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash 617649339, now seen corresponding path program 5 times [2022-07-12 04:02:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:06,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389712332] [2022-07-12 04:02:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 222 proven. 77 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-12 04:02:06,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389712332] [2022-07-12 04:02:06,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389712332] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:06,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283516409] [2022-07-12 04:02:06,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:02:06,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:06,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:06,391 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:06,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:02:06,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-12 04:02:06,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:02:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 04:02:06,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 1 proven. 405 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 04:02:06,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-12 04:02:07,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283516409] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:07,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:07,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 35 [2022-07-12 04:02:07,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121882540] [2022-07-12 04:02:07,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:07,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 04:02:07,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:07,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 04:02:07,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 04:02:07,262 INFO L87 Difference]: Start difference. First operand 814 states and 962 transitions. Second operand has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:34,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:02:34,381 INFO L93 Difference]: Finished difference Result 3471 states and 4041 transitions. [2022-07-12 04:02:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-07-12 04:02:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-12 04:02:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:02:34,389 INFO L225 Difference]: With dead ends: 3471 [2022-07-12 04:02:34,389 INFO L226 Difference]: Without dead ends: 2831 [2022-07-12 04:02:34,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14307 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=6498, Invalid=31332, Unknown=0, NotChecked=0, Total=37830 [2022-07-12 04:02:34,399 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-12 04:02:34,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 98 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-12 04:02:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-07-12 04:02:34,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 939. [2022-07-12 04:02:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 1.183368869936034) internal successors, (1110), 938 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1110 transitions. [2022-07-12 04:02:34,473 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1110 transitions. Word has length 57 [2022-07-12 04:02:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:02:34,473 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 1110 transitions. [2022-07-12 04:02:34,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:02:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1110 transitions. [2022-07-12 04:02:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-12 04:02:34,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:02:34,475 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-12 04:02:34,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 04:02:34,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:34,679 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:02:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:02:34,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1480398352, now seen corresponding path program 6 times [2022-07-12 04:02:34,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:02:34,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790831541] [2022-07-12 04:02:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:02:34,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:02:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:02:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 126 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 04:02:34,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:02:34,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790831541] [2022-07-12 04:02:34,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790831541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:02:34,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838807777] [2022-07-12 04:02:34,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:02:34,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:02:34,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:02:34,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:02:34,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:02:35,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-12 04:02:35,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:02:35,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 04:02:35,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:02:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 221 proven. 227 refuted. 3 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 04:02:39,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:02:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 126 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 04:02:41,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838807777] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:02:41,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:02:41,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 14] total 44 [2022-07-12 04:02:41,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902707035] [2022-07-12 04:02:41,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:02:41,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 04:02:41,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:02:41,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 04:02:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1335, Unknown=1, NotChecked=0, Total=1892 [2022-07-12 04:02:41,218 INFO L87 Difference]: Start difference. First operand 939 states and 1110 transitions. Second operand has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:03:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:03:16,504 INFO L93 Difference]: Finished difference Result 1333 states and 1604 transitions. [2022-07-12 04:03:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 04:03:16,505 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 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 [2022-07-12 04:03:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:03:16,506 INFO L225 Difference]: With dead ends: 1333 [2022-07-12 04:03:16,506 INFO L226 Difference]: Without dead ends: 431 [2022-07-12 04:03:16,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=1119, Invalid=2072, Unknown=1, NotChecked=0, Total=3192 [2022-07-12 04:03:16,507 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 276 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-12 04:03:16,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 42 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-12 04:03:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-07-12 04:03:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 103. [2022-07-12 04:03:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 102 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) [2022-07-12 04:03:16,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2022-07-12 04:03:16,517 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 60 [2022-07-12 04:03:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:03:16,517 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2022-07-12 04:03:16,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:03:16,517 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2022-07-12 04:03:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-12 04:03:16,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:03:16,518 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 21, 11, 1, 1, 1, 1, 1, 1] [2022-07-12 04:03:16,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:03:16,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:03:16,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:03:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:03:16,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2038282736, now seen corresponding path program 7 times [2022-07-12 04:03:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:03:16,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363276687] [2022-07-12 04:03:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:03:16,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:03:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:03:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 723 proven. 187 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-12 04:03:16,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:03:16,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363276687] [2022-07-12 04:03:16,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363276687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:03:16,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93902314] [2022-07-12 04:03:16,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:03:16,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:03:16,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:03:16,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 04:03:16,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:03:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:03:16,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-12 04:03:16,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:03:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:03:17,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:03:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-12 04:03:18,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93902314] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:03:18,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:03:18,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 25] total 59 [2022-07-12 04:03:18,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15849430] [2022-07-12 04:03:18,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:03:18,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-12 04:03:18,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:03:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-12 04:03:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=2824, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 04:03:18,518 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 59 states, 59 states have (on average 3.406779661016949) internal successors, (201), 59 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:01,158 WARN L233 SmtUtils]: Spent 20.50s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:04:03,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:04:58,480 WARN L233 SmtUtils]: Spent 25.09s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:05:00,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:05:34,169 WARN L233 SmtUtils]: Spent 10.57s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:05:35,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:05:37,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:05:41,863 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-12 04:06:16,841 WARN L233 SmtUtils]: Spent 15.83s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:06:19,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []