./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/byte_add-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/bitvector/byte_add-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:54:29,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:54:29,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:54:29,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:54:29,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:54:29,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:54:29,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:54:29,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:54:29,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:54:29,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:54:29,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:54:29,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:54:29,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:54:29,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:54:29,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:54:29,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:54:29,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:54:29,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:54:29,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:54:29,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:54:29,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:54:29,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:54:29,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:54:29,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:54:29,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:54:29,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:54:29,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:54:29,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:54:29,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:54:29,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:54:29,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:54:29,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:54:29,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:54:29,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:54:29,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:54:29,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:54:29,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:54:29,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:54:29,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:54:29,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:54:29,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:54:29,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:54:29,679 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:54:29,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:54:29,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:54:29,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:54:29,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:54:29,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:54:29,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:54:29,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:54:29,682 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:54:29,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:54:29,683 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:54:29,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:54:29,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:54:29,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:54:29,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:54:29,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:54:29,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:54:29,684 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:54:29,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:54:29,684 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:54:29,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:54:29,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:54:29,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:54:29,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:54:29,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:54:29,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:54:29,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:54:29,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:54:29,686 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:54:29,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:54:29,687 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:54:29,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:54:29,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:54:29,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:54:29,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2021-12-15 08:54:29,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:54:29,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:54:29,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:54:29,934 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:54:29,935 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:54:29,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add-1.i [2021-12-15 08:54:29,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc02f6eed/59b340975b414b5b9fc5306431b68d3a/FLAG81da7b69f [2021-12-15 08:54:30,295 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:54:30,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add-1.i [2021-12-15 08:54:30,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc02f6eed/59b340975b414b5b9fc5306431b68d3a/FLAG81da7b69f [2021-12-15 08:54:30,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc02f6eed/59b340975b414b5b9fc5306431b68d3a [2021-12-15 08:54:30,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:54:30,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:54:30,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:54:30,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:54:30,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:54:30,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:30,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9c17a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30, skipping insertion in model container [2021-12-15 08:54:30,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:30,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:54:30,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:54:30,879 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/bitvector/byte_add-1.i[1166,1179] [2021-12-15 08:54:30,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:54:30,923 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:54:30,935 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/bitvector/byte_add-1.i[1166,1179] [2021-12-15 08:54:30,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:54:30,974 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:54:30,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30 WrapperNode [2021-12-15 08:54:30,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:54:30,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:54:30,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:54:30,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:54:30,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:30,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:31,018 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 124 [2021-12-15 08:54:31,018 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:54:31,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:54:31,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:54:31,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:54:31,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:31,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:31,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:31,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:31,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:31,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:31,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:31,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:54:31,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:54:31,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:54:31,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:54:31,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (1/1) ... [2021-12-15 08:54:31,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:54:31,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:31,081 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:54:31,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:54:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:54:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:54:31,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:54:31,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:54:31,166 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:54:31,167 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:54:31,341 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:54:31,359 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:54:31,359 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 08:54:31,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:54:31 BoogieIcfgContainer [2021-12-15 08:54:31,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:54:31,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:54:31,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:54:31,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:54:31,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:54:30" (1/3) ... [2021-12-15 08:54:31,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4bed23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:54:31, skipping insertion in model container [2021-12-15 08:54:31,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:54:30" (2/3) ... [2021-12-15 08:54:31,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4bed23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:54:31, skipping insertion in model container [2021-12-15 08:54:31,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:54:31" (3/3) ... [2021-12-15 08:54:31,365 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-12-15 08:54:31,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:54:31,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:54:31,415 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:54:31,420 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:54:31,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:54:31,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:31,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 08:54:31,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:31,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:31,439 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:31,446 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-12-15 08:54:31,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:31,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018903990] [2021-12-15 08:54:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:31,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:31,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:31,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018903990] [2021-12-15 08:54:31,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018903990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:31,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:31,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:54:31,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116450885] [2021-12-15 08:54:31,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:31,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:54:31,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:31,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:54:31,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:54:31,626 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:31,636 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-12-15 08:54:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:54:31,638 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 08:54:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:31,643 INFO L225 Difference]: With dead ends: 57 [2021-12-15 08:54:31,643 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 08:54:31,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:54:31,647 INFO L933 BasicCegarLoop]: 68 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, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:31,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:54:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 08:54:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-15 08:54:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-12-15 08:54:31,670 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-12-15 08:54:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:31,670 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-12-15 08:54:31,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-12-15 08:54:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 08:54:31,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:31,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:31,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:54:31,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:31,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-12-15 08:54:31,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:31,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569261246] [2021-12-15 08:54:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:31,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:31,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:31,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569261246] [2021-12-15 08:54:31,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569261246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:31,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:31,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:54:31,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969494403] [2021-12-15 08:54:31,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:31,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:54:31,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:54:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:54:31,768 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:31,876 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2021-12-15 08:54:31,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:54:31,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 08:54:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:31,877 INFO L225 Difference]: With dead ends: 89 [2021-12-15 08:54:31,878 INFO L226 Difference]: Without dead ends: 61 [2021-12-15 08:54:31,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:54:31,889 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:31,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-15 08:54:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-12-15 08:54:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2021-12-15 08:54:31,903 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2021-12-15 08:54:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:31,904 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2021-12-15 08:54:31,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2021-12-15 08:54:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 08:54:31,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:31,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:31,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:54:31,907 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2021-12-15 08:54:31,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:31,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699283045] [2021-12-15 08:54:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:31,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:54:31,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:31,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699283045] [2021-12-15 08:54:31,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699283045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:31,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:31,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:54:31,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654669791] [2021-12-15 08:54:31,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:31,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:54:31,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:31,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:54:31,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:54:31,984 INFO L87 Difference]: Start difference. First operand 59 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:32,121 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2021-12-15 08:54:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:54:32,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 08:54:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:32,125 INFO L225 Difference]: With dead ends: 143 [2021-12-15 08:54:32,125 INFO L226 Difference]: Without dead ends: 105 [2021-12-15 08:54:32,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:54:32,133 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 85 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:32,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 156 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:32,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-15 08:54:32,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-12-15 08:54:32,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2021-12-15 08:54:32,149 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 18 [2021-12-15 08:54:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:32,149 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2021-12-15 08:54:32,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2021-12-15 08:54:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 08:54:32,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:32,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:32,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:54:32,152 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash -640429161, now seen corresponding path program 1 times [2021-12-15 08:54:32,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:32,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283976902] [2021-12-15 08:54:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:32,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:54:32,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:32,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283976902] [2021-12-15 08:54:32,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283976902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:32,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:32,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:54:32,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690183301] [2021-12-15 08:54:32,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:32,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:54:32,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:54:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:54:32,230 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:32,378 INFO L93 Difference]: Finished difference Result 169 states and 250 transitions. [2021-12-15 08:54:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:54:32,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 08:54:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:32,380 INFO L225 Difference]: With dead ends: 169 [2021-12-15 08:54:32,380 INFO L226 Difference]: Without dead ends: 125 [2021-12-15 08:54:32,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:54:32,381 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 89 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:32,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 164 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-15 08:54:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2021-12-15 08:54:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 111 transitions. [2021-12-15 08:54:32,386 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 111 transitions. Word has length 19 [2021-12-15 08:54:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:32,386 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 111 transitions. [2021-12-15 08:54:32,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 111 transitions. [2021-12-15 08:54:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 08:54:32,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:32,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:32,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 08:54:32,388 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:32,388 INFO L85 PathProgramCache]: Analyzing trace with hash -170409323, now seen corresponding path program 1 times [2021-12-15 08:54:32,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:32,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243603587] [2021-12-15 08:54:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:32,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:32,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:32,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243603587] [2021-12-15 08:54:32,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243603587] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:54:32,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97556494] [2021-12-15 08:54:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:32,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:32,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:32,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:32,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:54:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:32,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:54:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:32,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:54:32,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97556494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:32,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:54:32,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-15 08:54:32,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443235100] [2021-12-15 08:54:32,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:32,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:54:32,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:32,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:54:32,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:54:32,607 INFO L87 Difference]: Start difference. First operand 77 states and 111 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:32,749 INFO L93 Difference]: Finished difference Result 146 states and 237 transitions. [2021-12-15 08:54:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:54:32,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 08:54:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:32,751 INFO L225 Difference]: With dead ends: 146 [2021-12-15 08:54:32,751 INFO L226 Difference]: Without dead ends: 118 [2021-12-15 08:54:32,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:54:32,752 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:32,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 73 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-15 08:54:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-12-15 08:54:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.393939393939394) internal successors, (138), 99 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2021-12-15 08:54:32,764 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 20 [2021-12-15 08:54:32,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:32,767 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2021-12-15 08:54:32,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2021-12-15 08:54:32,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 08:54:32,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:32,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:32,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 08:54:32,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:32,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:32,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:32,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1606169286, now seen corresponding path program 1 times [2021-12-15 08:54:32,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:32,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760993809] [2021-12-15 08:54:32,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:32,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:33,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:33,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760993809] [2021-12-15 08:54:33,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760993809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:54:33,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624193359] [2021-12-15 08:54:33,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:33,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:33,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:33,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:33,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:54:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:33,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 08:54:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:54:33,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:54:33,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624193359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:33,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:54:33,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-12-15 08:54:33,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648771385] [2021-12-15 08:54:33,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:33,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:54:33,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:33,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:54:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:54:33,276 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:33,346 INFO L93 Difference]: Finished difference Result 199 states and 284 transitions. [2021-12-15 08:54:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:54:33,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 26 [2021-12-15 08:54:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:33,347 INFO L225 Difference]: With dead ends: 199 [2021-12-15 08:54:33,347 INFO L226 Difference]: Without dead ends: 132 [2021-12-15 08:54:33,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:54:33,348 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:33,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 107 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 57 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-12-15 08:54:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-15 08:54:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2021-12-15 08:54:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3883495145631068) internal successors, (143), 103 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 143 transitions. [2021-12-15 08:54:33,353 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 143 transitions. Word has length 26 [2021-12-15 08:54:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:33,353 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 143 transitions. [2021-12-15 08:54:33,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 143 transitions. [2021-12-15 08:54:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 08:54:33,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:33,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:33,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:54:33,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 08:54:33,572 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1853130052, now seen corresponding path program 1 times [2021-12-15 08:54:33,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:33,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771461840] [2021-12-15 08:54:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:33,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 08:54:33,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:33,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771461840] [2021-12-15 08:54:33,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771461840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:33,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:33,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 08:54:33,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867811599] [2021-12-15 08:54:33,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:33,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:54:33,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:33,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:54:33,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:54:33,613 INFO L87 Difference]: Start difference. First operand 104 states and 143 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:33,744 INFO L93 Difference]: Finished difference Result 282 states and 387 transitions. [2021-12-15 08:54:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 08:54:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-15 08:54:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:33,745 INFO L225 Difference]: With dead ends: 282 [2021-12-15 08:54:33,745 INFO L226 Difference]: Without dead ends: 211 [2021-12-15 08:54:33,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:54:33,746 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 106 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:33,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 91 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-15 08:54:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 124. [2021-12-15 08:54:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3902439024390243) internal successors, (171), 123 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 171 transitions. [2021-12-15 08:54:33,752 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 171 transitions. Word has length 32 [2021-12-15 08:54:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:33,752 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 171 transitions. [2021-12-15 08:54:33,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 171 transitions. [2021-12-15 08:54:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 08:54:33,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:33,753 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:33,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 08:54:33,754 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:33,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1751644167, now seen corresponding path program 1 times [2021-12-15 08:54:33,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:33,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755507179] [2021-12-15 08:54:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:33,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 08:54:33,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:33,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755507179] [2021-12-15 08:54:33,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755507179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:33,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:33,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:54:33,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593900199] [2021-12-15 08:54:33,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:33,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:54:33,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:33,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:54:33,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:54:33,777 INFO L87 Difference]: Start difference. First operand 124 states and 171 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:33,833 INFO L93 Difference]: Finished difference Result 242 states and 342 transitions. [2021-12-15 08:54:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:54:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 32 [2021-12-15 08:54:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:33,835 INFO L225 Difference]: With dead ends: 242 [2021-12-15 08:54:33,835 INFO L226 Difference]: Without dead ends: 151 [2021-12-15 08:54:33,835 INFO L932 BasicCegarLoop]: 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 [2021-12-15 08:54:33,836 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:33,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 59 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-15 08:54:33,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2021-12-15 08:54:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.4306569343065694) internal successors, (196), 137 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 196 transitions. [2021-12-15 08:54:33,840 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 196 transitions. Word has length 32 [2021-12-15 08:54:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:33,840 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 196 transitions. [2021-12-15 08:54:33,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 196 transitions. [2021-12-15 08:54:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 08:54:33,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:33,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:33,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 08:54:33,842 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:33,842 INFO L85 PathProgramCache]: Analyzing trace with hash 23363195, now seen corresponding path program 1 times [2021-12-15 08:54:33,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:33,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856479854] [2021-12-15 08:54:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:33,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:33,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:33,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856479854] [2021-12-15 08:54:33,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856479854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:54:33,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818105881] [2021-12-15 08:54:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:33,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:33,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:33,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:33,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:54:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:33,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 08:54:33,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 08:54:34,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:54:34,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818105881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:34,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:54:34,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-12-15 08:54:34,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978782127] [2021-12-15 08:54:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:34,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:54:34,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:54:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:54:34,088 INFO L87 Difference]: Start difference. First operand 138 states and 196 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:34,157 INFO L93 Difference]: Finished difference Result 249 states and 354 transitions. [2021-12-15 08:54:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:54:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 32 [2021-12-15 08:54:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:34,159 INFO L225 Difference]: With dead ends: 249 [2021-12-15 08:54:34,159 INFO L226 Difference]: Without dead ends: 144 [2021-12-15 08:54:34,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:54:34,162 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:34,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-12-15 08:54:34,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-15 08:54:34,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2021-12-15 08:54:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.3597122302158273) internal successors, (189), 139 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 189 transitions. [2021-12-15 08:54:34,166 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 189 transitions. Word has length 32 [2021-12-15 08:54:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:34,166 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 189 transitions. [2021-12-15 08:54:34,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 189 transitions. [2021-12-15 08:54:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 08:54:34,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:34,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:34,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 08:54:34,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:34,384 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1733976503, now seen corresponding path program 1 times [2021-12-15 08:54:34,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315119346] [2021-12-15 08:54:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:34,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:54:34,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:34,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315119346] [2021-12-15 08:54:34,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315119346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:54:34,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646018734] [2021-12-15 08:54:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:34,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:34,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:34,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:54:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:34,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:54:34,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:54:34,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:54:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 08:54:34,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646018734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:54:34,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:54:34,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2021-12-15 08:54:34,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502558372] [2021-12-15 08:54:34,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:54:34,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 08:54:34,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:34,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 08:54:34,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-15 08:54:34,702 INFO L87 Difference]: Start difference. First operand 140 states and 189 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:34,998 INFO L93 Difference]: Finished difference Result 365 states and 519 transitions. [2021-12-15 08:54:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 08:54:34,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 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 32 [2021-12-15 08:54:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:35,001 INFO L225 Difference]: With dead ends: 365 [2021-12-15 08:54:35,001 INFO L226 Difference]: Without dead ends: 258 [2021-12-15 08:54:35,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-15 08:54:35,003 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 286 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:35,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 98 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 346 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2021-12-15 08:54:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-15 08:54:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 193. [2021-12-15 08:54:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4114583333333333) internal successors, (271), 192 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 271 transitions. [2021-12-15 08:54:35,011 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 271 transitions. Word has length 32 [2021-12-15 08:54:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:35,013 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 271 transitions. [2021-12-15 08:54:35,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 271 transitions. [2021-12-15 08:54:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 08:54:35,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:35,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:35,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 08:54:35,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:35,232 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:35,233 INFO L85 PathProgramCache]: Analyzing trace with hash 86397356, now seen corresponding path program 2 times [2021-12-15 08:54:35,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:35,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739834033] [2021-12-15 08:54:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:35,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 08:54:35,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739834033] [2021-12-15 08:54:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739834033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:35,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:35,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 08:54:35,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199401315] [2021-12-15 08:54:35,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:35,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:54:35,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:35,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:54:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:54:35,283 INFO L87 Difference]: Start difference. First operand 193 states and 271 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:35,472 INFO L93 Difference]: Finished difference Result 736 states and 1022 transitions. [2021-12-15 08:54:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:54:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 08:54:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:35,474 INFO L225 Difference]: With dead ends: 736 [2021-12-15 08:54:35,474 INFO L226 Difference]: Without dead ends: 573 [2021-12-15 08:54:35,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:54:35,475 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 182 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:35,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 258 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-12-15 08:54:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 193. [2021-12-15 08:54:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4114583333333333) internal successors, (271), 192 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 271 transitions. [2021-12-15 08:54:35,481 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 271 transitions. Word has length 38 [2021-12-15 08:54:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:35,481 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 271 transitions. [2021-12-15 08:54:35,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 271 transitions. [2021-12-15 08:54:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 08:54:35,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:35,481 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:35,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 08:54:35,481 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:35,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:35,482 INFO L85 PathProgramCache]: Analyzing trace with hash -345904797, now seen corresponding path program 1 times [2021-12-15 08:54:35,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:35,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955930224] [2021-12-15 08:54:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:35,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 08:54:35,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:35,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955930224] [2021-12-15 08:54:35,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955930224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:35,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:35,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 08:54:35,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900626451] [2021-12-15 08:54:35,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:35,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:54:35,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:35,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:54:35,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:54:35,533 INFO L87 Difference]: Start difference. First operand 193 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:35,705 INFO L93 Difference]: Finished difference Result 718 states and 999 transitions. [2021-12-15 08:54:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:54:35,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-15 08:54:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:35,707 INFO L225 Difference]: With dead ends: 718 [2021-12-15 08:54:35,707 INFO L226 Difference]: Without dead ends: 556 [2021-12-15 08:54:35,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:54:35,708 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 171 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:35,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 283 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-12-15 08:54:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 193. [2021-12-15 08:54:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4114583333333333) internal successors, (271), 192 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 271 transitions. [2021-12-15 08:54:35,714 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 271 transitions. Word has length 39 [2021-12-15 08:54:35,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:35,714 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 271 transitions. [2021-12-15 08:54:35,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:35,714 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 271 transitions. [2021-12-15 08:54:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 08:54:35,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:35,715 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:35,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 08:54:35,715 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:35,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:35,715 INFO L85 PathProgramCache]: Analyzing trace with hash 190859729, now seen corresponding path program 1 times [2021-12-15 08:54:35,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:35,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748712474] [2021-12-15 08:54:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:35,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 08:54:35,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:35,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748712474] [2021-12-15 08:54:35,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748712474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:35,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:35,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 08:54:35,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141858384] [2021-12-15 08:54:35,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:35,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 08:54:35,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 08:54:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:54:35,770 INFO L87 Difference]: Start difference. First operand 193 states and 271 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:36,096 INFO L93 Difference]: Finished difference Result 904 states and 1253 transitions. [2021-12-15 08:54:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 08:54:36,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 08:54:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:36,099 INFO L225 Difference]: With dead ends: 904 [2021-12-15 08:54:36,099 INFO L226 Difference]: Without dead ends: 742 [2021-12-15 08:54:36,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-15 08:54:36,100 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 257 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:36,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 481 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:54:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-12-15 08:54:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 193. [2021-12-15 08:54:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4114583333333333) internal successors, (271), 192 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 271 transitions. [2021-12-15 08:54:36,111 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 271 transitions. Word has length 40 [2021-12-15 08:54:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:36,111 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 271 transitions. [2021-12-15 08:54:36,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,112 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 271 transitions. [2021-12-15 08:54:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 08:54:36,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:36,112 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:36,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 08:54:36,113 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:36,113 INFO L85 PathProgramCache]: Analyzing trace with hash -83899885, now seen corresponding path program 1 times [2021-12-15 08:54:36,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:36,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181107535] [2021-12-15 08:54:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:36,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-15 08:54:36,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:36,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181107535] [2021-12-15 08:54:36,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181107535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:36,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:36,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 08:54:36,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417727815] [2021-12-15 08:54:36,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:36,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 08:54:36,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:36,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 08:54:36,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:54:36,183 INFO L87 Difference]: Start difference. First operand 193 states and 271 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:36,578 INFO L93 Difference]: Finished difference Result 948 states and 1307 transitions. [2021-12-15 08:54:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 08:54:36,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 08:54:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:36,581 INFO L225 Difference]: With dead ends: 948 [2021-12-15 08:54:36,581 INFO L226 Difference]: Without dead ends: 785 [2021-12-15 08:54:36,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:54:36,582 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 367 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:36,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 666 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:54:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-12-15 08:54:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 181. [2021-12-15 08:54:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4055555555555554) internal successors, (253), 180 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 253 transitions. [2021-12-15 08:54:36,589 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 253 transitions. Word has length 40 [2021-12-15 08:54:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:36,590 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 253 transitions. [2021-12-15 08:54:36,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 253 transitions. [2021-12-15 08:54:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 08:54:36,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:36,590 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:36,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 08:54:36,590 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:36,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:36,591 INFO L85 PathProgramCache]: Analyzing trace with hash -175922243, now seen corresponding path program 1 times [2021-12-15 08:54:36,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:36,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220553927] [2021-12-15 08:54:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:36,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 08:54:36,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:36,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220553927] [2021-12-15 08:54:36,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220553927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:36,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:36,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:54:36,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742800000] [2021-12-15 08:54:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:36,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:54:36,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:36,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:54:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:54:36,630 INFO L87 Difference]: Start difference. First operand 181 states and 253 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:36,666 INFO L93 Difference]: Finished difference Result 434 states and 608 transitions. [2021-12-15 08:54:36,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:54:36,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-15 08:54:36,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:36,668 INFO L225 Difference]: With dead ends: 434 [2021-12-15 08:54:36,668 INFO L226 Difference]: Without dead ends: 274 [2021-12-15 08:54:36,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:54:36,669 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 40 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:36,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 223 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:54:36,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-15 08:54:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 205. [2021-12-15 08:54:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.4068627450980393) internal successors, (287), 204 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 287 transitions. [2021-12-15 08:54:36,675 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 287 transitions. Word has length 45 [2021-12-15 08:54:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:36,676 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 287 transitions. [2021-12-15 08:54:36,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 287 transitions. [2021-12-15 08:54:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 08:54:36,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:36,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:36,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 08:54:36,677 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:36,677 INFO L85 PathProgramCache]: Analyzing trace with hash -543246986, now seen corresponding path program 1 times [2021-12-15 08:54:36,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:36,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298196408] [2021-12-15 08:54:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:36,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 08:54:36,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:36,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298196408] [2021-12-15 08:54:36,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298196408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:54:36,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686427897] [2021-12-15 08:54:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:36,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:36,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:36,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:36,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:54:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:54:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 08:54:36,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:54:36,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686427897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:36,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:54:36,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-15 08:54:36,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558136873] [2021-12-15 08:54:36,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:36,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:54:36,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:36,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:54:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:54:36,914 INFO L87 Difference]: Start difference. First operand 205 states and 287 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2021-12-15 08:54:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:37,026 INFO L93 Difference]: Finished difference Result 598 states and 839 transitions. [2021-12-15 08:54:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:54:37,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 45 [2021-12-15 08:54:37,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:37,028 INFO L225 Difference]: With dead ends: 598 [2021-12-15 08:54:37,028 INFO L226 Difference]: Without dead ends: 396 [2021-12-15 08:54:37,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-15 08:54:37,028 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:37,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 139 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-15 08:54:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 351. [2021-12-15 08:54:37,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.3828571428571428) internal successors, (484), 350 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 484 transitions. [2021-12-15 08:54:37,037 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 484 transitions. Word has length 45 [2021-12-15 08:54:37,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:37,037 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 484 transitions. [2021-12-15 08:54:37,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2021-12-15 08:54:37,037 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 484 transitions. [2021-12-15 08:54:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-15 08:54:37,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:37,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:37,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-15 08:54:37,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 08:54:37,269 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1776534260, now seen corresponding path program 1 times [2021-12-15 08:54:37,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:37,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129605364] [2021-12-15 08:54:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:37,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 08:54:37,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:37,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129605364] [2021-12-15 08:54:37,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129605364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:54:37,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134991132] [2021-12-15 08:54:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:37,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:37,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:37,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:37,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:54:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:37,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:54:37,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 08:54:37,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:54:37,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134991132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:37,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:54:37,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2021-12-15 08:54:37,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876170167] [2021-12-15 08:54:37,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:37,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 08:54:37,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:37,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 08:54:37,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-15 08:54:37,670 INFO L87 Difference]: Start difference. First operand 351 states and 484 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:37,876 INFO L93 Difference]: Finished difference Result 936 states and 1298 transitions. [2021-12-15 08:54:37,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 08:54:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-15 08:54:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:37,878 INFO L225 Difference]: With dead ends: 936 [2021-12-15 08:54:37,878 INFO L226 Difference]: Without dead ends: 599 [2021-12-15 08:54:37,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:54:37,879 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 173 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:37,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 239 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:54:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-12-15 08:54:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 515. [2021-12-15 08:54:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.3365758754863812) internal successors, (687), 514 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 687 transitions. [2021-12-15 08:54:37,900 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 687 transitions. Word has length 46 [2021-12-15 08:54:37,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:37,900 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 687 transitions. [2021-12-15 08:54:37,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 687 transitions. [2021-12-15 08:54:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 08:54:37,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:37,901 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:37,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:54:38,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 08:54:38,116 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1065595819, now seen corresponding path program 1 times [2021-12-15 08:54:38,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:38,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820316783] [2021-12-15 08:54:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:38,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 08:54:38,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:38,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820316783] [2021-12-15 08:54:38,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820316783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:38,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:54:38,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 08:54:38,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349543353] [2021-12-15 08:54:38,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:38,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 08:54:38,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 08:54:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:54:38,199 INFO L87 Difference]: Start difference. First operand 515 states and 687 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) [2021-12-15 08:54:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:38,572 INFO L93 Difference]: Finished difference Result 2563 states and 3390 transitions. [2021-12-15 08:54:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 08:54:38,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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 47 [2021-12-15 08:54:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:38,578 INFO L225 Difference]: With dead ends: 2563 [2021-12-15 08:54:38,578 INFO L226 Difference]: Without dead ends: 2101 [2021-12-15 08:54:38,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:54:38,579 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 311 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:38,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 579 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:54:38,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-12-15 08:54:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 503. [2021-12-15 08:54:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.344621513944223) internal successors, (675), 502 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 675 transitions. [2021-12-15 08:54:38,596 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 675 transitions. Word has length 47 [2021-12-15 08:54:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:38,597 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 675 transitions. [2021-12-15 08:54:38,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) [2021-12-15 08:54:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 675 transitions. [2021-12-15 08:54:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 08:54:38,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:38,597 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:38,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 08:54:38,598 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:38,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1389589642, now seen corresponding path program 1 times [2021-12-15 08:54:38,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:38,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045492870] [2021-12-15 08:54:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:38,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 08:54:38,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:38,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045492870] [2021-12-15 08:54:38,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045492870] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:54:38,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834093412] [2021-12-15 08:54:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:38,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:38,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:38,681 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:38,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:54:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:38,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:54:38,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 08:54:38,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:54:38,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834093412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:38,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:54:38,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-15 08:54:38,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692359147] [2021-12-15 08:54:38,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:38,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:54:38,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:38,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:54:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:54:38,828 INFO L87 Difference]: Start difference. First operand 503 states and 675 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:38,920 INFO L93 Difference]: Finished difference Result 1521 states and 2034 transitions. [2021-12-15 08:54:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:54:38,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-15 08:54:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:38,923 INFO L225 Difference]: With dead ends: 1521 [2021-12-15 08:54:38,923 INFO L226 Difference]: Without dead ends: 1023 [2021-12-15 08:54:38,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-15 08:54:38,924 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 56 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:38,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 133 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:38,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-12-15 08:54:38,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 913. [2021-12-15 08:54:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 1.3333333333333333) internal successors, (1216), 912 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1216 transitions. [2021-12-15 08:54:38,944 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1216 transitions. Word has length 49 [2021-12-15 08:54:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:38,944 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1216 transitions. [2021-12-15 08:54:38,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1216 transitions. [2021-12-15 08:54:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-15 08:54:38,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:38,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:38,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 08:54:39,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:39,162 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:39,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:39,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2126140849, now seen corresponding path program 1 times [2021-12-15 08:54:39,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:39,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704873166] [2021-12-15 08:54:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:39,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 08:54:39,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:39,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704873166] [2021-12-15 08:54:39,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704873166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:54:39,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512254107] [2021-12-15 08:54:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:39,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:39,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:39,231 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:39,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 08:54:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 08:54:39,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:54:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 08:54:39,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:54:39,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512254107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:54:39,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:54:39,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2021-12-15 08:54:39,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577708252] [2021-12-15 08:54:39,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:54:39,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:54:39,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:54:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:54:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-15 08:54:39,559 INFO L87 Difference]: Start difference. First operand 913 states and 1216 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:54:39,743 INFO L93 Difference]: Finished difference Result 2003 states and 2658 transitions. [2021-12-15 08:54:39,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 08:54:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-15 08:54:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:54:39,746 INFO L225 Difference]: With dead ends: 2003 [2021-12-15 08:54:39,746 INFO L226 Difference]: Without dead ends: 1493 [2021-12-15 08:54:39,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-15 08:54:39,749 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 109 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:54:39,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 255 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:54:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-12-15 08:54:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1317. [2021-12-15 08:54:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 1.3275075987841944) internal successors, (1747), 1316 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1747 transitions. [2021-12-15 08:54:39,781 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1747 transitions. Word has length 50 [2021-12-15 08:54:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:54:39,781 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 1747 transitions. [2021-12-15 08:54:39,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:54:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1747 transitions. [2021-12-15 08:54:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 08:54:39,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:54:39,782 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:54:39,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 08:54:39,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:39,987 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:54:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:54:39,988 INFO L85 PathProgramCache]: Analyzing trace with hash 48257313, now seen corresponding path program 1 times [2021-12-15 08:54:39,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:54:39,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072227492] [2021-12-15 08:54:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:39,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:54:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-15 08:54:40,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:54:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072227492] [2021-12-15 08:54:40,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072227492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:54:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583776537] [2021-12-15 08:54:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:54:40,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:54:40,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:54:40,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:54:40,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 08:54:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:54:40,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 08:54:40,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 08:55:36,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:36,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583776537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:36,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:55:36,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2021-12-15 08:55:36,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303692299] [2021-12-15 08:55:36,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:36,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 08:55:36,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:55:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 08:55:36,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-15 08:55:36,836 INFO L87 Difference]: Start difference. First operand 1317 states and 1747 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:37,043 INFO L93 Difference]: Finished difference Result 2746 states and 3611 transitions. [2021-12-15 08:55:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 08:55:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-15 08:55:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:37,049 INFO L225 Difference]: With dead ends: 2746 [2021-12-15 08:55:37,050 INFO L226 Difference]: Without dead ends: 2713 [2021-12-15 08:55:37,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:55:37,051 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 99 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:37,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 420 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2021-12-15 08:55:37,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-15 08:55:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1485. [2021-12-15 08:55:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 1.3335579514824798) internal successors, (1979), 1484 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 1979 transitions. [2021-12-15 08:55:37,085 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 1979 transitions. Word has length 51 [2021-12-15 08:55:37,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:37,085 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 1979 transitions. [2021-12-15 08:55:37,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:37,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 1979 transitions. [2021-12-15 08:55:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 08:55:37,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:37,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:37,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:37,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:55:37,303 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:37,304 INFO L85 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2021-12-15 08:55:37,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:55:37,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792733036] [2021-12-15 08:55:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:37,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:55:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 08:55:37,318 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 08:55:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 08:55:37,349 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 08:55:37,349 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 08:55:37,350 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 08:55:37,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 08:55:37,353 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:37,355 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 08:55:37,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 08:55:37 BoogieIcfgContainer [2021-12-15 08:55:37,413 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 08:55:37,414 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 08:55:37,414 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 08:55:37,414 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 08:55:37,414 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:54:31" (3/4) ... [2021-12-15 08:55:37,416 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 08:55:37,416 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 08:55:37,416 INFO L158 Benchmark]: Toolchain (without parser) took 66694.14ms. Allocated memory was 94.4MB in the beginning and 383.8MB in the end (delta: 289.4MB). Free memory was 66.1MB in the beginning and 171.3MB in the end (delta: -105.2MB). Peak memory consumption was 183.7MB. Max. memory is 16.1GB. [2021-12-15 08:55:37,416 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 51.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 08:55:37,417 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.91ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 66.1MB in the beginning and 87.9MB in the end (delta: -21.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 08:55:37,417 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.86ms. Allocated memory is still 113.2MB. Free memory was 87.9MB in the beginning and 85.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 08:55:37,417 INFO L158 Benchmark]: Boogie Preprocessor took 35.56ms. Allocated memory is still 113.2MB. Free memory was 85.6MB in the beginning and 84.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 08:55:37,417 INFO L158 Benchmark]: RCFGBuilder took 305.51ms. Allocated memory is still 113.2MB. Free memory was 84.2MB in the beginning and 72.1MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 08:55:37,417 INFO L158 Benchmark]: TraceAbstraction took 66052.03ms. Allocated memory was 113.2MB in the beginning and 383.8MB in the end (delta: 270.5MB). Free memory was 71.6MB in the beginning and 172.3MB in the end (delta: -100.7MB). Peak memory consumption was 170.3MB. Max. memory is 16.1GB. [2021-12-15 08:55:37,418 INFO L158 Benchmark]: Witness Printer took 2.42ms. Allocated memory is still 383.8MB. Free memory was 172.3MB in the beginning and 171.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 08:55:37,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 51.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.91ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 66.1MB in the beginning and 87.9MB in the end (delta: -21.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.86ms. Allocated memory is still 113.2MB. Free memory was 87.9MB in the beginning and 85.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.56ms. Allocated memory is still 113.2MB. Free memory was 85.6MB in the beginning and 84.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 305.51ms. Allocated memory is still 113.2MB. Free memory was 84.2MB in the beginning and 72.1MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 66052.03ms. Allocated memory was 113.2MB in the beginning and 383.8MB in the end (delta: 270.5MB). Free memory was 71.6MB in the beginning and 172.3MB in the end (delta: -100.7MB). Peak memory consumption was 170.3MB. Max. memory is 16.1GB. * Witness Printer took 2.42ms. Allocated memory is still 383.8MB. Free memory was 172.3MB in the beginning and 171.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 116. Possible FailurePath: [L124] unsigned int a, b, r; [L126] a = __VERIFIER_nondet_uint() [L127] b = __VERIFIER_nondet_uint() [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=4] [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=3] [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=2] [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1] [L68] nb = (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L89] COND TRUE i < nb VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L95] COND FALSE !(partial_sum > ((unsigned char)254)) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L104] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L109] COND TRUE i == (unsigned char)1 [L109] r1 = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L110] COND TRUE i == (unsigned char)2 [L110] r2 = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L111] COND TRUE i == (unsigned char)3 [L111] r3 = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0, r3=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0, r3=0] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0, r3=0] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\old(a)=0, \old(b)=0, \result=3, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=0, r=3, r0=0, r1=0, r2=0, r3=0] [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 65.9s, OverallIterations: 22, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2523 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2523 mSDsluCounter, 4659 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 348 IncrementalHoareTripleChecker+Unchecked, 2962 mSDsCounter, 292 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3899 IncrementalHoareTripleChecker+Invalid, 4539 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 292 mSolverCounterUnsat, 1697 mSDtfsCounter, 3899 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 545 GetRequests, 405 SyntacticMatches, 27 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1485occurred in iteration=21, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 5509 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 59.0s InterpolantComputationTime, 1127 NumberOfCodeBlocks, 1127 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1077 ConstructedInterpolants, 27 QuantifiedInterpolants, 6201 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1123 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 31 InterpolantComputations, 20 PerfectInterpolantSequences, 536/589 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-15 08:55:37,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/bitvector/byte_add-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:55:38,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:55:38,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:55:39,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:55:39,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:55:39,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:55:39,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:55:39,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:55:39,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:55:39,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:55:39,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:55:39,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:55:39,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:55:39,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:55:39,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:55:39,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:55:39,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:55:39,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:55:39,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:55:39,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:55:39,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:55:39,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:55:39,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:55:39,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:55:39,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:55:39,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:55:39,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:55:39,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:55:39,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:55:39,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:55:39,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:55:39,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:55:39,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:55:39,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:55:39,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:55:39,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:55:39,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:55:39,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:55:39,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:55:39,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:55:39,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:55:39,078 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 08:55:39,106 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:55:39,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:55:39,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:55:39,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:55:39,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:55:39,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:55:39,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:55:39,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:55:39,110 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:55:39,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:55:39,111 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:55:39,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:55:39,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:55:39,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:55:39,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:55:39,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:55:39,112 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 08:55:39,112 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 08:55:39,112 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 08:55:39,112 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:55:39,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:55:39,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:55:39,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:55:39,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:55:39,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:55:39,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:55:39,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:55:39,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:55:39,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:55:39,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:55:39,121 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 08:55:39,121 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 08:55:39,122 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:55:39,122 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:55:39,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:55:39,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:55:39,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 08:55:39,123 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2021-12-15 08:55:39,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:55:39,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:55:39,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:55:39,393 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:55:39,394 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:55:39,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add-1.i [2021-12-15 08:55:39,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b3f8c14/99dfbc6b8ee1456c9dec0e3a9d29cf63/FLAG9c0b28d56 [2021-12-15 08:55:39,790 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:55:39,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add-1.i [2021-12-15 08:55:39,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b3f8c14/99dfbc6b8ee1456c9dec0e3a9d29cf63/FLAG9c0b28d56 [2021-12-15 08:55:40,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59b3f8c14/99dfbc6b8ee1456c9dec0e3a9d29cf63 [2021-12-15 08:55:40,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:55:40,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:55:40,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:55:40,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:55:40,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:55:40,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c2f00f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40, skipping insertion in model container [2021-12-15 08:55:40,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:55:40,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:55:40,317 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/bitvector/byte_add-1.i[1166,1179] [2021-12-15 08:55:40,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:55:40,345 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:55:40,359 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/bitvector/byte_add-1.i[1166,1179] [2021-12-15 08:55:40,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:55:40,410 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:55:40,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40 WrapperNode [2021-12-15 08:55:40,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:55:40,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:55:40,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:55:40,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:55:40,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,438 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 124 [2021-12-15 08:55:40,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:55:40,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:55:40,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:55:40,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:55:40,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:55:40,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:55:40,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:55:40,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:55:40,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (1/1) ... [2021-12-15 08:55:40,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:55:40,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:55:40,490 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:55:40,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:55:40,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:55:40,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 08:55:40,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:55:40,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:55:40,596 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:55:40,598 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:55:40,799 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:55:40,807 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:55:40,808 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 08:55:40,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:55:40 BoogieIcfgContainer [2021-12-15 08:55:40,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:55:40,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:55:40,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:55:40,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:55:40,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:55:40" (1/3) ... [2021-12-15 08:55:40,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f67739e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:55:40, skipping insertion in model container [2021-12-15 08:55:40,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:55:40" (2/3) ... [2021-12-15 08:55:40,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f67739e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:55:40, skipping insertion in model container [2021-12-15 08:55:40,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:55:40" (3/3) ... [2021-12-15 08:55:40,816 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-12-15 08:55:40,821 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:55:40,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:55:40,883 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:55:40,890 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:55:40,891 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:55:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 08:55:40,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:40,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:40,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:40,913 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-12-15 08:55:40,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:40,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433704087] [2021-12-15 08:55:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:40,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:40,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:40,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:40,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 08:55:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-15 08:55:41,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:41,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:41,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433704087] [2021-12-15 08:55:41,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433704087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:41,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:41,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:55:41,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587113988] [2021-12-15 08:55:41,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:41,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:55:41,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:55:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:55:41,096 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:41,112 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-12-15 08:55:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:55:41,113 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 08:55:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:41,119 INFO L225 Difference]: With dead ends: 57 [2021-12-15 08:55:41,120 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 08:55:41,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:55:41,125 INFO L933 BasicCegarLoop]: 68 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, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:41,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:55:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 08:55:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-15 08:55:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-12-15 08:55:41,153 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-12-15 08:55:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:41,153 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-12-15 08:55:41,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-12-15 08:55:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 08:55:41,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:41,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:41,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 08:55:41,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:41,362 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-12-15 08:55:41,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:41,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572863386] [2021-12-15 08:55:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:41,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:41,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:41,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:41,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 08:55:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:55:41,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:41,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:41,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:41,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572863386] [2021-12-15 08:55:41,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572863386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:41,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:41,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:55:41,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813915403] [2021-12-15 08:55:41,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:41,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:55:41,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:41,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:55:41,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:55:41,458 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:41,622 INFO L93 Difference]: Finished difference Result 116 states and 201 transitions. [2021-12-15 08:55:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:55:41,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 08:55:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:41,624 INFO L225 Difference]: With dead ends: 116 [2021-12-15 08:55:41,624 INFO L226 Difference]: Without dead ends: 88 [2021-12-15 08:55:41,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:55:41,625 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 66 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:41,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 152 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:55:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-15 08:55:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2021-12-15 08:55:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.625) internal successors, (130), 80 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-12-15 08:55:41,640 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 12 [2021-12-15 08:55:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:41,640 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-12-15 08:55:41,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-12-15 08:55:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 08:55:41,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:41,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:41,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:41,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:41,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1087802014, now seen corresponding path program 1 times [2021-12-15 08:55:41,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:41,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186800483] [2021-12-15 08:55:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:41,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:41,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:41,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:41,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 08:55:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:41,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:55:41,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:41,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:41,930 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:41,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186800483] [2021-12-15 08:55:41,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186800483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:41,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:41,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 08:55:41,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777961158] [2021-12-15 08:55:41,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:41,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:55:41,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:41,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:55:41,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:55:41,931 INFO L87 Difference]: Start difference. First operand 81 states and 130 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:42,041 INFO L93 Difference]: Finished difference Result 164 states and 271 transitions. [2021-12-15 08:55:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 08:55:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 08:55:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:42,046 INFO L225 Difference]: With dead ends: 164 [2021-12-15 08:55:42,046 INFO L226 Difference]: Without dead ends: 136 [2021-12-15 08:55:42,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:55:42,050 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 141 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:42,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 284 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:55:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-15 08:55:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2021-12-15 08:55:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.625) internal successors, (130), 80 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-12-15 08:55:42,063 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 13 [2021-12-15 08:55:42,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:42,063 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-12-15 08:55:42,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-12-15 08:55:42,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 08:55:42,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:42,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:42,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:42,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:42,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:42,271 INFO L85 PathProgramCache]: Analyzing trace with hash 583572890, now seen corresponding path program 1 times [2021-12-15 08:55:42,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:42,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599638357] [2021-12-15 08:55:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:42,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:42,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:42,272 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:42,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-15 08:55:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:42,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 08:55:42,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:42,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:42,352 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:42,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599638357] [2021-12-15 08:55:42,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599638357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:42,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:42,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 08:55:42,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984533226] [2021-12-15 08:55:42,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:42,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 08:55:42,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:42,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 08:55:42,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:55:42,357 INFO L87 Difference]: Start difference. First operand 81 states and 130 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:42,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:42,561 INFO L93 Difference]: Finished difference Result 212 states and 341 transitions. [2021-12-15 08:55:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:55:42,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-12-15 08:55:42,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:42,562 INFO L225 Difference]: With dead ends: 212 [2021-12-15 08:55:42,562 INFO L226 Difference]: Without dead ends: 184 [2021-12-15 08:55:42,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:55:42,563 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 166 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:42,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 559 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:55:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-15 08:55:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 81. [2021-12-15 08:55:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.625) internal successors, (130), 80 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:42,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-12-15 08:55:42,568 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 14 [2021-12-15 08:55:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:42,568 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-12-15 08:55:42,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-12-15 08:55:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 08:55:42,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:42,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:42,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:42,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:42,775 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1392919516, now seen corresponding path program 1 times [2021-12-15 08:55:42,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:42,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494992767] [2021-12-15 08:55:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:42,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:42,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:42,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-15 08:55:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:42,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:55:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:42,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:42,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494992767] [2021-12-15 08:55:42,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494992767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:42,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:42,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 08:55:42,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350958550] [2021-12-15 08:55:42,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 08:55:42,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 08:55:42,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:55:42,848 INFO L87 Difference]: Start difference. First operand 81 states and 130 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:42,950 INFO L93 Difference]: Finished difference Result 227 states and 354 transitions. [2021-12-15 08:55:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 08:55:42,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-12-15 08:55:42,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:42,951 INFO L225 Difference]: With dead ends: 227 [2021-12-15 08:55:42,951 INFO L226 Difference]: Without dead ends: 199 [2021-12-15 08:55:42,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:55:42,952 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 233 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:42,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 683 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:55:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-12-15 08:55:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 87. [2021-12-15 08:55:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.5) internal successors, (129), 86 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 129 transitions. [2021-12-15 08:55:42,961 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 129 transitions. Word has length 14 [2021-12-15 08:55:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:42,961 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 129 transitions. [2021-12-15 08:55:42,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 129 transitions. [2021-12-15 08:55:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 08:55:42,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:42,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:42,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:43,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:43,175 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1480128500, now seen corresponding path program 1 times [2021-12-15 08:55:43,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:43,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504310490] [2021-12-15 08:55:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:43,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:43,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:43,177 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:43,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-15 08:55:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:43,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:55:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:43,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:43,286 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:43,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504310490] [2021-12-15 08:55:43,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504310490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:43,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:43,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:55:43,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111892630] [2021-12-15 08:55:43,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:43,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:55:43,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:43,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:55:43,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:55:43,288 INFO L87 Difference]: Start difference. First operand 87 states and 129 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:43,395 INFO L93 Difference]: Finished difference Result 243 states and 358 transitions. [2021-12-15 08:55:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:55:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 08:55:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:43,396 INFO L225 Difference]: With dead ends: 243 [2021-12-15 08:55:43,397 INFO L226 Difference]: Without dead ends: 173 [2021-12-15 08:55:43,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:55:43,397 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 70 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:43,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 161 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:55:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-15 08:55:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 97. [2021-12-15 08:55:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4791666666666667) internal successors, (142), 96 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 142 transitions. [2021-12-15 08:55:43,402 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 142 transitions. Word has length 25 [2021-12-15 08:55:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:43,402 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 142 transitions. [2021-12-15 08:55:43,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 142 transitions. [2021-12-15 08:55:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 08:55:43,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:43,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:43,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:43,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:43,609 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:43,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:43,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1384042382, now seen corresponding path program 1 times [2021-12-15 08:55:43,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:43,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867298009] [2021-12-15 08:55:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:43,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:43,611 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:43,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-15 08:55:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:43,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:55:43,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:43,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:43,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867298009] [2021-12-15 08:55:43,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867298009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:43,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:43,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 08:55:43,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706247788] [2021-12-15 08:55:43,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:43,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:55:43,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:55:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:55:43,706 INFO L87 Difference]: Start difference. First operand 97 states and 142 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:43,837 INFO L93 Difference]: Finished difference Result 325 states and 477 transitions. [2021-12-15 08:55:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 08:55:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-15 08:55:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:43,839 INFO L225 Difference]: With dead ends: 325 [2021-12-15 08:55:43,839 INFO L226 Difference]: Without dead ends: 255 [2021-12-15 08:55:43,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:55:43,840 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 127 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:43,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 342 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:55:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-15 08:55:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 97. [2021-12-15 08:55:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4791666666666667) internal successors, (142), 96 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 142 transitions. [2021-12-15 08:55:43,844 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 142 transitions. Word has length 26 [2021-12-15 08:55:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:43,844 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 142 transitions. [2021-12-15 08:55:43,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 142 transitions. [2021-12-15 08:55:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 08:55:43,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:43,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:43,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:44,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:44,051 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1985045161, now seen corresponding path program 1 times [2021-12-15 08:55:44,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:44,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973950570] [2021-12-15 08:55:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:44,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:44,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:44,053 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:44,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-15 08:55:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:44,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:55:44,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:44,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:44,150 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:44,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973950570] [2021-12-15 08:55:44,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973950570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:44,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:44,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 08:55:44,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167129856] [2021-12-15 08:55:44,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:44,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 08:55:44,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:44,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 08:55:44,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:55:44,152 INFO L87 Difference]: Start difference. First operand 97 states and 142 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:44,236 INFO L93 Difference]: Finished difference Result 401 states and 584 transitions. [2021-12-15 08:55:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 08:55:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 08:55:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:44,237 INFO L225 Difference]: With dead ends: 401 [2021-12-15 08:55:44,237 INFO L226 Difference]: Without dead ends: 331 [2021-12-15 08:55:44,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:55:44,241 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 256 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:44,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 775 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:55:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-12-15 08:55:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 157. [2021-12-15 08:55:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.455128205128205) internal successors, (227), 156 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 227 transitions. [2021-12-15 08:55:44,253 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 227 transitions. Word has length 27 [2021-12-15 08:55:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:44,253 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 227 transitions. [2021-12-15 08:55:44,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 227 transitions. [2021-12-15 08:55:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 08:55:44,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:44,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:44,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:44,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:44,464 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash 179606827, now seen corresponding path program 1 times [2021-12-15 08:55:44,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:44,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942947820] [2021-12-15 08:55:44,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:44,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:44,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:44,466 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:44,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-15 08:55:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:44,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 08:55:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:44,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:44,537 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:44,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942947820] [2021-12-15 08:55:44,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942947820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:44,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:44,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 08:55:44,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856429502] [2021-12-15 08:55:44,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:44,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 08:55:44,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 08:55:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:55:44,539 INFO L87 Difference]: Start difference. First operand 157 states and 227 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:44,617 INFO L93 Difference]: Finished difference Result 399 states and 578 transitions. [2021-12-15 08:55:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:55:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 08:55:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:44,618 INFO L225 Difference]: With dead ends: 399 [2021-12-15 08:55:44,618 INFO L226 Difference]: Without dead ends: 329 [2021-12-15 08:55:44,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 08:55:44,624 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 207 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:44,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 442 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:55:44,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-15 08:55:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 147. [2021-12-15 08:55:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.452054794520548) internal successors, (212), 146 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 212 transitions. [2021-12-15 08:55:44,630 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 212 transitions. Word has length 27 [2021-12-15 08:55:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:44,630 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 212 transitions. [2021-12-15 08:55:44,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 212 transitions. [2021-12-15 08:55:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 08:55:44,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:44,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:44,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-15 08:55:44,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 08:55:44,839 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:55:44,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:55:44,839 INFO L85 PathProgramCache]: Analyzing trace with hash 221982208, now seen corresponding path program 1 times [2021-12-15 08:55:44,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 08:55:44,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356347850] [2021-12-15 08:55:44,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:55:44,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 08:55:44,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 08:55:44,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 08:55:44,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-15 08:55:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:55:44,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 08:55:44,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:55:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:55:44,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 08:55:44,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 08:55:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356347850] [2021-12-15 08:55:44,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356347850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:55:44,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:55:44,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:55:44,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923685751] [2021-12-15 08:55:44,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:55:44,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:55:44,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 08:55:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:55:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:55:44,912 INFO L87 Difference]: Start difference. First operand 147 states and 212 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:55:44,926 INFO L93 Difference]: Finished difference Result 201 states and 290 transitions. [2021-12-15 08:55:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:55:44,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-15 08:55:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:55:44,928 INFO L225 Difference]: With dead ends: 201 [2021-12-15 08:55:44,928 INFO L226 Difference]: Without dead ends: 187 [2021-12-15 08:55:44,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:55:44,929 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:55:44,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 123 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:55:44,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-15 08:55:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-12-15 08:55:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.4408602150537635) internal successors, (268), 186 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 268 transitions. [2021-12-15 08:55:44,934 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 268 transitions. Word has length 29 [2021-12-15 08:55:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:55:44,935 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 268 transitions. [2021-12-15 08:55:44,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:55:44,935 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 268 transitions. [2021-12-15 08:55:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 08:55:44,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:55:44,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:55:44,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0