./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/loop-invgen/fragtest_simple.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:51:59,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:51:59,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:51:59,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:51:59,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:51:59,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:51:59,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:51:59,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:51:59,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:51:59,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:51:59,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:51:59,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:51:59,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:51:59,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:51:59,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:51:59,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:51:59,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:51:59,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:51:59,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:51:59,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:51:59,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:51:59,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:51:59,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:51:59,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:52:00,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:52:00,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:52:00,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:52:00,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:52:00,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:52:00,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:52:00,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:52:00,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:52:00,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:52:00,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:52:00,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:52:00,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:52:00,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:52:00,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:52:00,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:52:00,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:52:00,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:52:00,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:52:00,044 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:52:00,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:52:00,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:52:00,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:52:00,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:52:00,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:52:00,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:52:00,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:52:00,047 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:52:00,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:52:00,048 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:52:00,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:52:00,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:52:00,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:52:00,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:52:00,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:52:00,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:52:00,049 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:52:00,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:52:00,050 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:52:00,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:52:00,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:52:00,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:52:00,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:52:00,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:52:00,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:52:00,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:52:00,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:52:00,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:52:00,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:52:00,052 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:52:00,052 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:52:00,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:52:00,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:52:00,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2021-12-15 10:52:00,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:52:00,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:52:00,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:52:00,290 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:52:00,290 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:52:00,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2021-12-15 10:52:00,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e224e9462/d3d09395d92b404783a5a8238d17e118/FLAG9c7214396 [2021-12-15 10:52:00,687 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:52:00,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2021-12-15 10:52:00,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e224e9462/d3d09395d92b404783a5a8238d17e118/FLAG9c7214396 [2021-12-15 10:52:00,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e224e9462/d3d09395d92b404783a5a8238d17e118 [2021-12-15 10:52:00,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:52:00,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:52:00,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:52:00,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:52:00,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:52:00,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573643da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00, skipping insertion in model container [2021-12-15 10:52:00,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:52:00,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:52:00,846 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2021-12-15 10:52:00,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:52:00,886 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:52:00,896 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2021-12-15 10:52:00,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:52:00,909 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:52:00,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00 WrapperNode [2021-12-15 10:52:00,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:52:00,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:52:00,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:52:00,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:52:00,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,940 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-12-15 10:52:00,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:52:00,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:52:00,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:52:00,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:52:00,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:52:00,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:52:00,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:52:00,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:52:00,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (1/1) ... [2021-12-15 10:52:00,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:52:00,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:00,997 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 10:52:01,007 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 10:52:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:52:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:52:01,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:52:01,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:52:01,071 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:52:01,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:52:01,150 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:52:01,155 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:52:01,155 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 10:52:01,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:52:01 BoogieIcfgContainer [2021-12-15 10:52:01,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:52:01,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:52:01,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:52:01,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:52:01,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:52:00" (1/3) ... [2021-12-15 10:52:01,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50307a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:52:01, skipping insertion in model container [2021-12-15 10:52:01,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:52:00" (2/3) ... [2021-12-15 10:52:01,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50307a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:52:01, skipping insertion in model container [2021-12-15 10:52:01,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:52:01" (3/3) ... [2021-12-15 10:52:01,165 INFO L111 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2021-12-15 10:52:01,169 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:52:01,169 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:52:01,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:52:01,224 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 10:52:01,225 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:52:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 10:52:01,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:01,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:01,242 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:01,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1265170590, now seen corresponding path program 1 times [2021-12-15 10:52:01,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:01,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897436651] [2021-12-15 10:52:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:01,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:01,401 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 10:52:01,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:01,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897436651] [2021-12-15 10:52:01,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897436651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:52:01,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:52:01,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:52:01,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110980681] [2021-12-15 10:52:01,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:52:01,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 10:52:01,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 10:52:01,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 10:52:01,443 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:01,460 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2021-12-15 10:52:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 10:52:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 10:52:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:01,468 INFO L225 Difference]: With dead ends: 34 [2021-12-15 10:52:01,469 INFO L226 Difference]: Without dead ends: 15 [2021-12-15 10:52:01,473 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 10:52:01,480 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:01,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:52:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-15 10:52:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-15 10:52:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-12-15 10:52:01,510 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2021-12-15 10:52:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:01,511 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-12-15 10:52:01,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-12-15 10:52:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 10:52:01,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:01,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:01,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:52:01,513 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1704738984, now seen corresponding path program 1 times [2021-12-15 10:52:01,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:01,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440718727] [2021-12-15 10:52:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:01,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:01,653 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 10:52:01,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440718727] [2021-12-15 10:52:01,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440718727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:52:01,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:52:01,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 10:52:01,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376485540] [2021-12-15 10:52:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:52:01,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:52:01,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:52:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:52:01,658 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:01,679 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-12-15 10:52:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 10:52:01,680 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 10:52:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:01,681 INFO L225 Difference]: With dead ends: 20 [2021-12-15 10:52:01,681 INFO L226 Difference]: Without dead ends: 18 [2021-12-15 10:52:01,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:52:01,687 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:01,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:52:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-15 10:52:01,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-12-15 10:52:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-15 10:52:01,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2021-12-15 10:52:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:01,700 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-15 10:52:01,700 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 10:52:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-15 10:52:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 10:52:01,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:01,715 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:01,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:52:01,715 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:01,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1111328011, now seen corresponding path program 1 times [2021-12-15 10:52:01,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:01,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220230687] [2021-12-15 10:52:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:01,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:01,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:01,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220230687] [2021-12-15 10:52:01,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220230687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:52:01,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:52:01,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 10:52:01,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081480527] [2021-12-15 10:52:01,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:52:01,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 10:52:01,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 10:52:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:52:01,779 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:01,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:01,843 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-15 10:52:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 10:52:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-15 10:52:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:01,844 INFO L225 Difference]: With dead ends: 34 [2021-12-15 10:52:01,846 INFO L226 Difference]: Without dead ends: 23 [2021-12-15 10:52:01,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:52:01,848 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:01,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:52:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-15 10:52:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-12-15 10:52:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-12-15 10:52:01,858 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2021-12-15 10:52:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:01,859 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-12-15 10:52:01,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-12-15 10:52:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 10:52:01,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:01,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:01,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:52:01,861 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:01,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1396960176, now seen corresponding path program 1 times [2021-12-15 10:52:01,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:01,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374414592] [2021-12-15 10:52:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:01,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:01,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:01,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374414592] [2021-12-15 10:52:01,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374414592] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:01,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222838145] [2021-12-15 10:52:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:01,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:01,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:01,975 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 10:52:02,041 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 10:52:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:02,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:52:02,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:02,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:02,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222838145] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:02,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:02,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-15 10:52:02,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680830991] [2021-12-15 10:52:02,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:02,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 10:52:02,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 10:52:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-15 10:52:02,323 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:02,456 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-12-15 10:52:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 10:52:02,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 10:52:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:02,457 INFO L225 Difference]: With dead ends: 45 [2021-12-15 10:52:02,458 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 10:52:02,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-12-15 10:52:02,460 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:02,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:02,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 10:52:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2021-12-15 10:52:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-15 10:52:02,465 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-12-15 10:52:02,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:02,465 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-15 10:52:02,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:02,466 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-15 10:52:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 10:52:02,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:02,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:02,490 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 10:52:02,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:02,690 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2071602104, now seen corresponding path program 2 times [2021-12-15 10:52:02,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:02,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483033111] [2021-12-15 10:52:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:02,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:02,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483033111] [2021-12-15 10:52:02,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483033111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:02,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076049165] [2021-12-15 10:52:02,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:52:02,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:02,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:02,784 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 10:52:02,809 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 10:52:02,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:52:02,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:02,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 10:52:02,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:02,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:03,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076049165] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:03,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:03,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2021-12-15 10:52:03,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680628383] [2021-12-15 10:52:03,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:03,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 10:52:03,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:03,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 10:52:03,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-15 10:52:03,003 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:03,223 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-12-15 10:52:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 10:52:03,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-15 10:52:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:03,225 INFO L225 Difference]: With dead ends: 61 [2021-12-15 10:52:03,225 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 10:52:03,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-12-15 10:52:03,227 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:03,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 59 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:03,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 10:52:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-12-15 10:52:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-15 10:52:03,233 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2021-12-15 10:52:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:03,233 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-15 10:52:03,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-15 10:52:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 10:52:03,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:03,234 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:03,259 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 10:52:03,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:03,456 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1976024800, now seen corresponding path program 3 times [2021-12-15 10:52:03,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:03,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876543922] [2021-12-15 10:52:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:03,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:03,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:03,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876543922] [2021-12-15 10:52:03,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876543922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:03,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571142116] [2021-12-15 10:52:03,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:52:03,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:03,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:03,569 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 10:52:03,571 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 10:52:03,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 10:52:03,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:03,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 10:52:03,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:03,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:03,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571142116] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:03,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:03,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-12-15 10:52:03,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469117523] [2021-12-15 10:52:03,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:03,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-15 10:52:03,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:03,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-15 10:52:03,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-12-15 10:52:03,813 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:03,903 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-12-15 10:52:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 10:52:03,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-15 10:52:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:03,904 INFO L225 Difference]: With dead ends: 68 [2021-12-15 10:52:03,904 INFO L226 Difference]: Without dead ends: 49 [2021-12-15 10:52:03,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-12-15 10:52:03,906 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:03,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 89 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:03,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-15 10:52:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-12-15 10:52:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-15 10:52:03,910 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2021-12-15 10:52:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:03,911 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-15 10:52:03,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-15 10:52:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 10:52:03,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:03,912 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:03,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:04,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:04,132 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1350589691, now seen corresponding path program 4 times [2021-12-15 10:52:04,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:04,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135922398] [2021-12-15 10:52:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:04,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:04,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135922398] [2021-12-15 10:52:04,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135922398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:04,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710271030] [2021-12-15 10:52:04,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:52:04,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:04,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:04,227 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 10:52:04,229 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 10:52:04,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:52:04,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:04,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-15 10:52:04,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:04,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:04,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710271030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:04,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:04,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2021-12-15 10:52:04,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32600359] [2021-12-15 10:52:04,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:04,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 10:52:04,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 10:52:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:52:04,446 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 10:52:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:04,524 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-12-15 10:52:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 10:52:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 10:52:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:04,526 INFO L225 Difference]: With dead ends: 50 [2021-12-15 10:52:04,526 INFO L226 Difference]: Without dead ends: 48 [2021-12-15 10:52:04,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-12-15 10:52:04,527 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:04,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 86 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:52:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-15 10:52:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-12-15 10:52:04,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-12-15 10:52:04,531 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 32 [2021-12-15 10:52:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:04,532 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-12-15 10:52:04,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 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 10:52:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-12-15 10:52:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 10:52:04,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:04,533 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:04,550 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 10:52:04,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:04,734 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:04,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:04,734 INFO L85 PathProgramCache]: Analyzing trace with hash -498130965, now seen corresponding path program 5 times [2021-12-15 10:52:04,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:04,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860740679] [2021-12-15 10:52:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:04,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:04,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:04,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860740679] [2021-12-15 10:52:04,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860740679] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:04,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49059593] [2021-12-15 10:52:04,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:52:04,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:04,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:04,855 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 10:52:04,885 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 10:52:04,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-15 10:52:04,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:04,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 10:52:04,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:05,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:05,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49059593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:05,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:05,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2021-12-15 10:52:05,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407620934] [2021-12-15 10:52:05,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:05,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 10:52:05,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:05,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 10:52:05,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-12-15 10:52:05,250 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:05,442 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2021-12-15 10:52:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 10:52:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 10:52:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:05,444 INFO L225 Difference]: With dead ends: 115 [2021-12-15 10:52:05,444 INFO L226 Difference]: Without dead ends: 69 [2021-12-15 10:52:05,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 10:52:05,445 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:05,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 107 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-15 10:52:05,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-12-15 10:52:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-12-15 10:52:05,450 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 40 [2021-12-15 10:52:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:05,451 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-12-15 10:52:05,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-12-15 10:52:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 10:52:05,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:05,452 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:05,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:05,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:05,674 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:05,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1499997707, now seen corresponding path program 6 times [2021-12-15 10:52:05,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:05,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260263804] [2021-12-15 10:52:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:05,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:05,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:05,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260263804] [2021-12-15 10:52:05,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260263804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:05,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574188348] [2021-12-15 10:52:05,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:52:05,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:05,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:05,777 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 10:52:05,819 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 10:52:05,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-15 10:52:05,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:05,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 10:52:05,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:05,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:06,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574188348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:06,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:06,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2021-12-15 10:52:06,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476077332] [2021-12-15 10:52:06,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:06,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 10:52:06,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 10:52:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-15 10:52:06,025 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:06,144 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-12-15 10:52:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 10:52:06,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-15 10:52:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:06,148 INFO L225 Difference]: With dead ends: 62 [2021-12-15 10:52:06,148 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 10:52:06,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-12-15 10:52:06,150 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:06,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 121 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 10:52:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-12-15 10:52:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-12-15 10:52:06,157 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 44 [2021-12-15 10:52:06,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:06,157 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-12-15 10:52:06,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-12-15 10:52:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 10:52:06,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:06,158 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:06,186 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 10:52:06,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:06,371 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:06,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1325832485, now seen corresponding path program 7 times [2021-12-15 10:52:06,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:06,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363974454] [2021-12-15 10:52:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:06,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 80 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:06,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:06,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363974454] [2021-12-15 10:52:06,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363974454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:06,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561898847] [2021-12-15 10:52:06,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:52:06,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:06,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:06,518 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 10:52:06,519 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 10:52:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:06,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 10:52:06,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:52:06,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:52:06,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561898847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:06,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:06,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2021-12-15 10:52:06,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561863967] [2021-12-15 10:52:06,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:06,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 10:52:06,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:06,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 10:52:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-12-15 10:52:06,909 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:07,073 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2021-12-15 10:52:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 10:52:07,074 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-15 10:52:07,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:07,075 INFO L225 Difference]: With dead ends: 116 [2021-12-15 10:52:07,075 INFO L226 Difference]: Without dead ends: 83 [2021-12-15 10:52:07,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 10:52:07,077 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:07,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 161 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:07,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-15 10:52:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-12-15 10:52:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-12-15 10:52:07,091 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 52 [2021-12-15 10:52:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:07,092 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-12-15 10:52:07,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-12-15 10:52:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 10:52:07,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:07,093 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:07,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-15 10:52:07,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:07,316 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:07,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1066393856, now seen corresponding path program 8 times [2021-12-15 10:52:07,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:07,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595385290] [2021-12-15 10:52:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:07,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 80 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:07,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:07,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595385290] [2021-12-15 10:52:07,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595385290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:07,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318661369] [2021-12-15 10:52:07,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:52:07,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:07,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:07,480 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 10:52:07,485 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 10:52:07,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:52:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 10:52:07,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:07,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:07,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318661369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:07,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:07,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 27 [2021-12-15 10:52:07,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891060793] [2021-12-15 10:52:07,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:07,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 10:52:07,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:07,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 10:52:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-12-15 10:52:07,877 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:08,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:08,414 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2021-12-15 10:52:08,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-15 10:52:08,415 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-15 10:52:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:08,415 INFO L225 Difference]: With dead ends: 131 [2021-12-15 10:52:08,416 INFO L226 Difference]: Without dead ends: 96 [2021-12-15 10:52:08,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=626, Invalid=2796, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 10:52:08,418 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 137 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:08,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 145 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:52:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-15 10:52:08,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 61. [2021-12-15 10:52:08,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-12-15 10:52:08,426 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2021-12-15 10:52:08,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:08,428 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-12-15 10:52:08,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-12-15 10:52:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-15 10:52:08,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:08,433 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:08,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-15 10:52:08,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 10:52:08,634 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:08,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash 85268760, now seen corresponding path program 9 times [2021-12-15 10:52:08,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:08,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819102444] [2021-12-15 10:52:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:08,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 107 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:08,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:08,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819102444] [2021-12-15 10:52:08,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819102444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:08,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685474547] [2021-12-15 10:52:08,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:52:08,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:08,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:08,811 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 10:52:08,811 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 10:52:08,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-15 10:52:08,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 10:52:08,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:09,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:09,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685474547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:09,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:09,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2021-12-15 10:52:09,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120456821] [2021-12-15 10:52:09,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:09,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 10:52:09,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 10:52:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2021-12-15 10:52:09,319 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:09,525 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2021-12-15 10:52:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 10:52:09,526 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-15 10:52:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:09,526 INFO L225 Difference]: With dead ends: 138 [2021-12-15 10:52:09,526 INFO L226 Difference]: Without dead ends: 99 [2021-12-15 10:52:09,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=1155, Unknown=0, NotChecked=0, Total=1560 [2021-12-15 10:52:09,528 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 128 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:09,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 164 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-15 10:52:09,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2021-12-15 10:52:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:09,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-12-15 10:52:09,533 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2021-12-15 10:52:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:09,533 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-12-15 10:52:09,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-12-15 10:52:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 10:52:09,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:09,534 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:09,563 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 10:52:09,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:09,755 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:09,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:09,756 INFO L85 PathProgramCache]: Analyzing trace with hash -600318915, now seen corresponding path program 10 times [2021-12-15 10:52:09,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:09,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247505783] [2021-12-15 10:52:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:09,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:09,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247505783] [2021-12-15 10:52:09,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247505783] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542467965] [2021-12-15 10:52:09,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:52:09,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:09,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:09,899 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:09,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 10:52:09,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:52:09,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:09,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 10:52:09,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:10,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:10,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542467965] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:10,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:10,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2021-12-15 10:52:10,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639122955] [2021-12-15 10:52:10,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:10,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-15 10:52:10,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:10,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-15 10:52:10,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-12-15 10:52:10,211 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:10,377 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2021-12-15 10:52:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 10:52:10,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-15 10:52:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:10,378 INFO L225 Difference]: With dead ends: 80 [2021-12-15 10:52:10,378 INFO L226 Difference]: Without dead ends: 78 [2021-12-15 10:52:10,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-12-15 10:52:10,379 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:10,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 122 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:10,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-15 10:52:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-12-15 10:52:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-12-15 10:52:10,385 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 62 [2021-12-15 10:52:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:10,386 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-12-15 10:52:10,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-12-15 10:52:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 10:52:10,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:10,387 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:10,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:10,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 10:52:10,603 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:10,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2101960413, now seen corresponding path program 11 times [2021-12-15 10:52:10,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:10,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977603966] [2021-12-15 10:52:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:10,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 173 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:10,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:10,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977603966] [2021-12-15 10:52:10,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977603966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:10,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125212055] [2021-12-15 10:52:10,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:52:10,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:10,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:10,836 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:10,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 10:52:10,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-15 10:52:10,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-15 10:52:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:11,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:11,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125212055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:11,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:11,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2021-12-15 10:52:11,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705796022] [2021-12-15 10:52:11,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:11,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-15 10:52:11,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-15 10:52:11,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 10:52:11,432 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:11,786 INFO L93 Difference]: Finished difference Result 205 states and 232 transitions. [2021-12-15 10:52:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-15 10:52:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-15 10:52:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:11,787 INFO L225 Difference]: With dead ends: 205 [2021-12-15 10:52:11,787 INFO L226 Difference]: Without dead ends: 119 [2021-12-15 10:52:11,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 10:52:11,789 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 170 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:11,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 266 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:52:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-15 10:52:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2021-12-15 10:52:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-12-15 10:52:11,795 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2021-12-15 10:52:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:11,795 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-12-15 10:52:11,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-12-15 10:52:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 10:52:11,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:11,796 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:11,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:12,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 10:52:12,017 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1953124947, now seen corresponding path program 12 times [2021-12-15 10:52:12,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:12,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343302801] [2021-12-15 10:52:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:12,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 110 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:12,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:12,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343302801] [2021-12-15 10:52:12,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343302801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:12,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717352362] [2021-12-15 10:52:12,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:52:12,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:12,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:12,146 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:12,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 10:52:12,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-15 10:52:12,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:12,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 10:52:12,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:12,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:12,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717352362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:12,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:12,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2021-12-15 10:52:12,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852550588] [2021-12-15 10:52:12,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:12,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 10:52:12,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:12,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 10:52:12,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-12-15 10:52:12,523 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:12,691 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-12-15 10:52:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 10:52:12,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-15 10:52:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:12,692 INFO L225 Difference]: With dead ends: 92 [2021-12-15 10:52:12,692 INFO L226 Difference]: Without dead ends: 90 [2021-12-15 10:52:12,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2021-12-15 10:52:12,693 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:12,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 121 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-15 10:52:12,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2021-12-15 10:52:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-12-15 10:52:12,699 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 74 [2021-12-15 10:52:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:12,699 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-12-15 10:52:12,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-12-15 10:52:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 10:52:12,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:12,702 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:12,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:12,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 10:52:12,907 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:12,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:12,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1101267603, now seen corresponding path program 13 times [2021-12-15 10:52:12,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:12,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059902638] [2021-12-15 10:52:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:12,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 255 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:13,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:13,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059902638] [2021-12-15 10:52:13,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059902638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:13,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354120532] [2021-12-15 10:52:13,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:52:13,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:13,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:13,180 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:13,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 10:52:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:13,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 10:52:13,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:52:13,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:52:13,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354120532] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:13,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:13,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2021-12-15 10:52:13,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706860461] [2021-12-15 10:52:13,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:13,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-15 10:52:13,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:13,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-15 10:52:13,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 10:52:13,829 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:14,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:14,105 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2021-12-15 10:52:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 10:52:14,105 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 10:52:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:14,106 INFO L225 Difference]: With dead ends: 186 [2021-12-15 10:52:14,106 INFO L226 Difference]: Without dead ends: 133 [2021-12-15 10:52:14,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=2061, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 10:52:14,110 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 137 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:14,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 249 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:52:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-15 10:52:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 85. [2021-12-15 10:52:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-12-15 10:52:14,117 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 82 [2021-12-15 10:52:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:14,118 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-12-15 10:52:14,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-12-15 10:52:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 10:52:14,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:14,120 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:14,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:14,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 10:52:14,339 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1272075272, now seen corresponding path program 14 times [2021-12-15 10:52:14,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:14,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930248148] [2021-12-15 10:52:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:14,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 255 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:14,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:14,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930248148] [2021-12-15 10:52:14,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930248148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:14,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534211962] [2021-12-15 10:52:14,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:52:14,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:14,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:14,623 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:14,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 10:52:14,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:52:14,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:14,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 10:52:14,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 156 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:15,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 156 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:15,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534211962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:15,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:15,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 42 [2021-12-15 10:52:15,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656943599] [2021-12-15 10:52:15,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:15,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-15 10:52:15,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:15,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-15 10:52:15,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 10:52:15,223 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:16,043 INFO L93 Difference]: Finished difference Result 201 states and 232 transitions. [2021-12-15 10:52:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-15 10:52:16,044 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-15 10:52:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:16,044 INFO L225 Difference]: With dead ends: 201 [2021-12-15 10:52:16,044 INFO L226 Difference]: Without dead ends: 146 [2021-12-15 10:52:16,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1501, Invalid=7241, Unknown=0, NotChecked=0, Total=8742 [2021-12-15 10:52:16,048 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 252 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:16,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 186 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 10:52:16,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-15 10:52:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 91. [2021-12-15 10:52:16,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-12-15 10:52:16,055 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2021-12-15 10:52:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:16,055 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-12-15 10:52:16,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 42 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:16,055 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-12-15 10:52:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-15 10:52:16,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:16,056 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:16,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:16,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:16,271 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:16,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:16,272 INFO L85 PathProgramCache]: Analyzing trace with hash -641963184, now seen corresponding path program 15 times [2021-12-15 10:52:16,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:16,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674005574] [2021-12-15 10:52:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:16,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 302 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:16,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:16,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674005574] [2021-12-15 10:52:16,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674005574] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:16,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262686405] [2021-12-15 10:52:16,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:52:16,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:16,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:16,628 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:16,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 10:52:16,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-15 10:52:16,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:16,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 10:52:16,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:17,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:17,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262686405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:17,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:17,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2021-12-15 10:52:17,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109392188] [2021-12-15 10:52:17,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:17,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-15 10:52:17,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-15 10:52:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2021-12-15 10:52:17,394 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:17,737 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2021-12-15 10:52:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 10:52:17,738 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-15 10:52:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:17,739 INFO L225 Difference]: With dead ends: 208 [2021-12-15 10:52:17,739 INFO L226 Difference]: Without dead ends: 149 [2021-12-15 10:52:17,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-12-15 10:52:17,741 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 160 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:17,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 324 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:52:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-15 10:52:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2021-12-15 10:52:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2021-12-15 10:52:17,746 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 90 [2021-12-15 10:52:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:17,746 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2021-12-15 10:52:17,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2021-12-15 10:52:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 10:52:17,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:17,747 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:17,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:17,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 10:52:17,952 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1603067829, now seen corresponding path program 16 times [2021-12-15 10:52:17,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:17,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713853035] [2021-12-15 10:52:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:17,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 182 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:18,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:18,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713853035] [2021-12-15 10:52:18,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713853035] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:18,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495220362] [2021-12-15 10:52:18,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:52:18,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:18,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:18,134 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:18,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 10:52:18,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:52:18,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:18,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-15 10:52:18,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:18,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:18,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495220362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:18,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:18,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2021-12-15 10:52:18,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325225012] [2021-12-15 10:52:18,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:18,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 10:52:18,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 10:52:18,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-12-15 10:52:18,500 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:18,723 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2021-12-15 10:52:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-15 10:52:18,723 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-15 10:52:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:18,724 INFO L225 Difference]: With dead ends: 110 [2021-12-15 10:52:18,724 INFO L226 Difference]: Without dead ends: 108 [2021-12-15 10:52:18,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=502, Invalid=904, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 10:52:18,725 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:18,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 202 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-15 10:52:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-12-15 10:52:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2021-12-15 10:52:18,730 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 92 [2021-12-15 10:52:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:18,730 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2021-12-15 10:52:18,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2021-12-15 10:52:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-15 10:52:18,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:18,732 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:18,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:18,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:18,943 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:18,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:18,944 INFO L85 PathProgramCache]: Analyzing trace with hash 778874011, now seen corresponding path program 17 times [2021-12-15 10:52:18,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:18,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901360921] [2021-12-15 10:52:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:18,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 408 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:19,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:19,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901360921] [2021-12-15 10:52:19,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901360921] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:19,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452328046] [2021-12-15 10:52:19,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:52:19,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:19,338 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:19,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 10:52:19,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-15 10:52:19,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:19,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-15 10:52:19,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:20,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:20,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452328046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:20,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:20,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2021-12-15 10:52:20,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375768010] [2021-12-15 10:52:20,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:20,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-15 10:52:20,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-15 10:52:20,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=2106, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 10:52:20,254 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:20,828 INFO L93 Difference]: Finished difference Result 295 states and 332 transitions. [2021-12-15 10:52:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-15 10:52:20,828 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-15 10:52:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:20,829 INFO L225 Difference]: With dead ends: 295 [2021-12-15 10:52:20,829 INFO L226 Difference]: Without dead ends: 169 [2021-12-15 10:52:20,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1721, Invalid=5251, Unknown=0, NotChecked=0, Total=6972 [2021-12-15 10:52:20,831 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 339 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:20,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 306 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:52:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-15 10:52:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 105. [2021-12-15 10:52:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2021-12-15 10:52:20,837 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 100 [2021-12-15 10:52:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:20,838 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2021-12-15 10:52:20,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2021-12-15 10:52:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-15 10:52:20,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:20,839 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:20,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-15 10:52:21,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:21,052 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:21,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash -706040923, now seen corresponding path program 18 times [2021-12-15 10:52:21,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:21,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29239929] [2021-12-15 10:52:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:21,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 240 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:21,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:21,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29239929] [2021-12-15 10:52:21,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29239929] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:21,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441590859] [2021-12-15 10:52:21,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:52:21,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:21,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:21,287 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:21,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 10:52:21,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-15 10:52:21,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:21,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-15 10:52:21,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:21,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:21,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441590859] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:21,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:21,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 23 [2021-12-15 10:52:21,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792567982] [2021-12-15 10:52:21,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:21,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 10:52:21,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:21,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 10:52:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2021-12-15 10:52:21,791 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:22,042 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2021-12-15 10:52:22,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-15 10:52:22,043 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-15 10:52:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:22,043 INFO L225 Difference]: With dead ends: 122 [2021-12-15 10:52:22,043 INFO L226 Difference]: Without dead ends: 120 [2021-12-15 10:52:22,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=617, Invalid=1105, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 10:52:22,044 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 136 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:22,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 202 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:22,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-15 10:52:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2021-12-15 10:52:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2021-12-15 10:52:22,051 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 104 [2021-12-15 10:52:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:22,051 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2021-12-15 10:52:22,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2021-12-15 10:52:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-15 10:52:22,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:22,052 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:22,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-15 10:52:22,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:22,253 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1006078091, now seen corresponding path program 19 times [2021-12-15 10:52:22,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:22,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976401204] [2021-12-15 10:52:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:22,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 530 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:22,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976401204] [2021-12-15 10:52:22,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976401204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415925313] [2021-12-15 10:52:22,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:52:22,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:22,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:22,728 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:22,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 10:52:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:22,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-15 10:52:22,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:52:23,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:52:23,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415925313] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:23,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:23,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 56 [2021-12-15 10:52:23,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387576593] [2021-12-15 10:52:23,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:23,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-15 10:52:23,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-15 10:52:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=2374, Unknown=0, NotChecked=0, Total=3080 [2021-12-15 10:52:23,753 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:24,180 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2021-12-15 10:52:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-15 10:52:24,180 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-15 10:52:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:24,181 INFO L225 Difference]: With dead ends: 256 [2021-12-15 10:52:24,181 INFO L226 Difference]: Without dead ends: 183 [2021-12-15 10:52:24,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1320, Invalid=3936, Unknown=0, NotChecked=0, Total=5256 [2021-12-15 10:52:24,183 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 242 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:24,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 379 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:52:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-15 10:52:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2021-12-15 10:52:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2021-12-15 10:52:24,190 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 112 [2021-12-15 10:52:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:24,191 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2021-12-15 10:52:24,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2021-12-15 10:52:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-15 10:52:24,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:24,192 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:24,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:24,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:24,399 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1154118448, now seen corresponding path program 20 times [2021-12-15 10:52:24,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:24,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414838105] [2021-12-15 10:52:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:24,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 530 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:24,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:24,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414838105] [2021-12-15 10:52:24,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414838105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:24,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78492503] [2021-12-15 10:52:24,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:52:24,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:24,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:24,886 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:24,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 10:52:24,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:52:24,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:24,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 10:52:24,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:25,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:25,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78492503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:25,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:25,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2021-12-15 10:52:25,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050806305] [2021-12-15 10:52:25,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:25,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-15 10:52:25,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:25,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-15 10:52:25,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2021-12-15 10:52:25,981 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:26,401 INFO L93 Difference]: Finished difference Result 264 states and 304 transitions. [2021-12-15 10:52:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-15 10:52:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-15 10:52:26,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:26,402 INFO L225 Difference]: With dead ends: 264 [2021-12-15 10:52:26,402 INFO L226 Difference]: Without dead ends: 189 [2021-12-15 10:52:26,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2021-12-15 10:52:26,403 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 213 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:26,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 398 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:52:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-12-15 10:52:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2021-12-15 10:52:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2021-12-15 10:52:26,409 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 114 [2021-12-15 10:52:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:26,410 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2021-12-15 10:52:26,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2021-12-15 10:52:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-15 10:52:26,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:26,410 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:26,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:26,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-15 10:52:26,611 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:26,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1686980757, now seen corresponding path program 21 times [2021-12-15 10:52:26,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:26,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225691683] [2021-12-15 10:52:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:26,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 306 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:26,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:26,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225691683] [2021-12-15 10:52:26,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225691683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:26,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953574541] [2021-12-15 10:52:26,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:52:26,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:26,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:26,872 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:26,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 10:52:26,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-12-15 10:52:26,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:26,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-15 10:52:26,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:27,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:27,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953574541] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:27,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:27,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 25 [2021-12-15 10:52:27,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289977929] [2021-12-15 10:52:27,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:27,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 10:52:27,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:27,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 10:52:27,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-12-15 10:52:27,366 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:27,620 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2021-12-15 10:52:27,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-15 10:52:27,620 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-15 10:52:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:27,621 INFO L225 Difference]: With dead ends: 134 [2021-12-15 10:52:27,621 INFO L226 Difference]: Without dead ends: 132 [2021-12-15 10:52:27,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=744, Invalid=1326, Unknown=0, NotChecked=0, Total=2070 [2021-12-15 10:52:27,624 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 146 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:27,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 208 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-15 10:52:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2021-12-15 10:52:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-12-15 10:52:27,631 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 116 [2021-12-15 10:52:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:27,631 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-12-15 10:52:27,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:27,632 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-12-15 10:52:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 10:52:27,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:27,633 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:27,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-15 10:52:27,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-15 10:52:27,839 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:27,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:27,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1134152325, now seen corresponding path program 22 times [2021-12-15 10:52:27,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:27,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250613310] [2021-12-15 10:52:27,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:27,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 668 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:28,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250613310] [2021-12-15 10:52:28,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250613310] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614020630] [2021-12-15 10:52:28,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:52:28,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:28,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:28,377 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:28,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 10:52:28,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:52:28,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:28,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-15 10:52:28,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:29,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:29,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614020630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:29,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:29,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2021-12-15 10:52:29,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892618614] [2021-12-15 10:52:29,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:29,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-15 10:52:29,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:29,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-15 10:52:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=3190, Unknown=0, NotChecked=0, Total=4160 [2021-12-15 10:52:29,538 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:30,383 INFO L93 Difference]: Finished difference Result 367 states and 412 transitions. [2021-12-15 10:52:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-15 10:52:30,383 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-15 10:52:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:30,384 INFO L225 Difference]: With dead ends: 367 [2021-12-15 10:52:30,384 INFO L226 Difference]: Without dead ends: 209 [2021-12-15 10:52:30,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2629, Invalid=8083, Unknown=0, NotChecked=0, Total=10712 [2021-12-15 10:52:30,386 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 335 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:30,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 539 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 10:52:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-15 10:52:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2021-12-15 10:52:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2021-12-15 10:52:30,394 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 124 [2021-12-15 10:52:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:30,394 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2021-12-15 10:52:30,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2021-12-15 10:52:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-15 10:52:30,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:30,395 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:30,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:30,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:30,596 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:30,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:30,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1132082821, now seen corresponding path program 23 times [2021-12-15 10:52:30,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:30,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196267428] [2021-12-15 10:52:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:30,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 380 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:30,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:30,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196267428] [2021-12-15 10:52:30,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196267428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:30,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372358801] [2021-12-15 10:52:30,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:52:30,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:30,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:30,871 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:30,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-15 10:52:30,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-12-15 10:52:30,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:30,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-15 10:52:30,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:31,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:31,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372358801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:31,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:31,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 27 [2021-12-15 10:52:31,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917498553] [2021-12-15 10:52:31,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:31,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 10:52:31,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:31,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 10:52:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-12-15 10:52:31,427 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:31,728 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2021-12-15 10:52:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-15 10:52:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-15 10:52:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:31,730 INFO L225 Difference]: With dead ends: 146 [2021-12-15 10:52:31,730 INFO L226 Difference]: Without dead ends: 144 [2021-12-15 10:52:31,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=883, Invalid=1567, Unknown=0, NotChecked=0, Total=2450 [2021-12-15 10:52:31,731 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 128 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:31,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 214 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:31,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-15 10:52:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2021-12-15 10:52:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2021-12-15 10:52:31,738 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 128 [2021-12-15 10:52:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:31,739 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2021-12-15 10:52:31,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2021-12-15 10:52:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-15 10:52:31,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:31,740 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:31,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:31,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:31,955 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1245590379, now seen corresponding path program 24 times [2021-12-15 10:52:31,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850928395] [2021-12-15 10:52:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:31,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 822 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:32,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:32,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850928395] [2021-12-15 10:52:32,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850928395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:32,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499709831] [2021-12-15 10:52:32,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:52:32,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:32,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:32,630 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:32,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-15 10:52:32,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-12-15 10:52:32,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:32,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-15 10:52:32,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:33,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:33,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499709831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:33,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:33,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 71 [2021-12-15 10:52:33,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715581235] [2021-12-15 10:52:33,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:33,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-15 10:52:33,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:33,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-15 10:52:33,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=3816, Unknown=0, NotChecked=0, Total=4970 [2021-12-15 10:52:33,983 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:34,951 INFO L93 Difference]: Finished difference Result 403 states and 452 transitions. [2021-12-15 10:52:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-15 10:52:34,951 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-15 10:52:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:34,952 INFO L225 Difference]: With dead ends: 403 [2021-12-15 10:52:34,952 INFO L226 Difference]: Without dead ends: 229 [2021-12-15 10:52:34,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3155, Invalid=9727, Unknown=0, NotChecked=0, Total=12882 [2021-12-15 10:52:34,956 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 386 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:34,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 506 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 10:52:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-15 10:52:34,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 141. [2021-12-15 10:52:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:34,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2021-12-15 10:52:34,964 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 136 [2021-12-15 10:52:34,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:34,964 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2021-12-15 10:52:34,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:34,965 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2021-12-15 10:52:34,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-15 10:52:34,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:34,966 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:34,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-15 10:52:35,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-15 10:52:35,191 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:35,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:35,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1485376139, now seen corresponding path program 25 times [2021-12-15 10:52:35,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:35,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562490939] [2021-12-15 10:52:35,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:35,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 462 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:35,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:35,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562490939] [2021-12-15 10:52:35,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562490939] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:35,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945035977] [2021-12-15 10:52:35,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:52:35,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:35,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:35,520 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:35,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-15 10:52:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:35,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-15 10:52:35,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:35,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:36,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945035977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:36,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:36,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 29 [2021-12-15 10:52:36,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565069239] [2021-12-15 10:52:36,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:36,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 10:52:36,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 10:52:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2021-12-15 10:52:36,110 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:36,431 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2021-12-15 10:52:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-15 10:52:36,432 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-15 10:52:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:36,432 INFO L225 Difference]: With dead ends: 158 [2021-12-15 10:52:36,433 INFO L226 Difference]: Without dead ends: 156 [2021-12-15 10:52:36,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1034, Invalid=1828, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 10:52:36,434 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 158 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:36,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 234 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:52:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-15 10:52:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2021-12-15 10:52:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2021-12-15 10:52:36,443 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 140 [2021-12-15 10:52:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:36,443 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2021-12-15 10:52:36,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2021-12-15 10:52:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-15 10:52:36,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:36,445 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:36,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-15 10:52:36,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-15 10:52:36,659 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1127939493, now seen corresponding path program 26 times [2021-12-15 10:52:36,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064808076] [2021-12-15 10:52:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:36,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 992 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:37,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:37,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064808076] [2021-12-15 10:52:37,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064808076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:37,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322913456] [2021-12-15 10:52:37,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:52:37,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:37,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:37,350 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:37,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-15 10:52:37,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:52:37,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:37,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-15 10:52:37,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:52:38,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:52:38,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322913456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:38,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:38,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 74 [2021-12-15 10:52:38,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202086387] [2021-12-15 10:52:38,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:38,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-15 10:52:38,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-15 10:52:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=4174, Unknown=0, NotChecked=0, Total=5402 [2021-12-15 10:52:38,745 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:39,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:39,389 INFO L93 Difference]: Finished difference Result 340 states and 390 transitions. [2021-12-15 10:52:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-15 10:52:39,389 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-12-15 10:52:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:39,391 INFO L225 Difference]: With dead ends: 340 [2021-12-15 10:52:39,391 INFO L226 Difference]: Without dead ends: 243 [2021-12-15 10:52:39,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2334, Invalid=6978, Unknown=0, NotChecked=0, Total=9312 [2021-12-15 10:52:39,392 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 267 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:39,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 503 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 10:52:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-15 10:52:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 151. [2021-12-15 10:52:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2021-12-15 10:52:39,407 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 148 [2021-12-15 10:52:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:39,407 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2021-12-15 10:52:39,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2021-12-15 10:52:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-15 10:52:39,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:39,408 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:39,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:39,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-15 10:52:39,631 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:39,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1461075584, now seen corresponding path program 27 times [2021-12-15 10:52:39,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:39,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043498968] [2021-12-15 10:52:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:39,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 992 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:40,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:40,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043498968] [2021-12-15 10:52:40,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043498968] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:40,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594874074] [2021-12-15 10:52:40,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:52:40,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:40,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:40,409 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:40,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-15 10:52:40,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-15 10:52:40,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-15 10:52:40,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 552 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:41,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 552 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:41,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594874074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:41,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:41,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27, 27] total 75 [2021-12-15 10:52:41,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774154457] [2021-12-15 10:52:41,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:41,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-15 10:52:41,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-15 10:52:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=4598, Unknown=0, NotChecked=0, Total=5550 [2021-12-15 10:52:41,588 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:43,461 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2021-12-15 10:52:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-15 10:52:43,461 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-12-15 10:52:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:43,462 INFO L225 Difference]: With dead ends: 355 [2021-12-15 10:52:43,462 INFO L226 Difference]: Without dead ends: 256 [2021-12-15 10:52:43,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9588 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4746, Invalid=24324, Unknown=0, NotChecked=0, Total=29070 [2021-12-15 10:52:43,464 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 611 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:43,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 360 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 10:52:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-15 10:52:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 157. [2021-12-15 10:52:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2021-12-15 10:52:43,476 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 150 [2021-12-15 10:52:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:43,476 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2021-12-15 10:52:43,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.973333333333333) internal successors, (298), 75 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2021-12-15 10:52:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-15 10:52:43,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:43,478 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:43,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:43,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:43,699 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:43,700 INFO L85 PathProgramCache]: Analyzing trace with hash -897123176, now seen corresponding path program 28 times [2021-12-15 10:52:43,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:43,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953616978] [2021-12-15 10:52:43,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:43,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 1083 proven. 669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:44,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:44,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953616978] [2021-12-15 10:52:44,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953616978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:44,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402547405] [2021-12-15 10:52:44,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:52:44,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:44,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:44,525 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:44,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-15 10:52:44,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:52:44,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:44,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 10:52:44,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 1152 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:45,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 1152 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:46,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402547405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:46,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:46,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 79 [2021-12-15 10:52:46,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934730859] [2021-12-15 10:52:46,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:46,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-15 10:52:46,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-15 10:52:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=4755, Unknown=0, NotChecked=0, Total=6162 [2021-12-15 10:52:46,027 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 79 states, 79 states have (on average 3.2911392405063293) internal successors, (260), 79 states have internal predecessors, (260), 0 states have call successors, (0), 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 10:52:46,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:46,678 INFO L93 Difference]: Finished difference Result 362 states and 416 transitions. [2021-12-15 10:52:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-15 10:52:46,678 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.2911392405063293) internal successors, (260), 79 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-12-15 10:52:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:46,679 INFO L225 Difference]: With dead ends: 362 [2021-12-15 10:52:46,679 INFO L226 Difference]: Without dead ends: 259 [2021-12-15 10:52:46,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2362 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2709, Invalid=8003, Unknown=0, NotChecked=0, Total=10712 [2021-12-15 10:52:46,680 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 350 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:46,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 568 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 10:52:46,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-15 10:52:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 159. [2021-12-15 10:52:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 0 states have call successors, (0), 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 10:52:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2021-12-15 10:52:46,690 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 156 [2021-12-15 10:52:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:46,690 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2021-12-15 10:52:46,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.2911392405063293) internal successors, (260), 79 states have internal predecessors, (260), 0 states have call successors, (0), 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 10:52:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2021-12-15 10:52:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-15 10:52:46,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:46,692 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:46,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:46,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:46,906 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:46,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:46,906 INFO L85 PathProgramCache]: Analyzing trace with hash -71285827, now seen corresponding path program 29 times [2021-12-15 10:52:46,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:46,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865594359] [2021-12-15 10:52:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:46,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 600 proven. 1202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:47,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:47,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865594359] [2021-12-15 10:52:47,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865594359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:47,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440181547] [2021-12-15 10:52:47,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:52:47,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:47,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:47,278 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:47,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-15 10:52:47,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-15 10:52:47,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:47,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-15 10:52:47,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 650 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:47,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 650 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:47,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440181547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:47,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:47,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 32 [2021-12-15 10:52:47,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661500933] [2021-12-15 10:52:47,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:47,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 10:52:47,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 10:52:47,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2021-12-15 10:52:47,930 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 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 10:52:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:48,359 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2021-12-15 10:52:48,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-15 10:52:48,360 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 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 158 [2021-12-15 10:52:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:48,361 INFO L225 Difference]: With dead ends: 176 [2021-12-15 10:52:48,361 INFO L226 Difference]: Without dead ends: 174 [2021-12-15 10:52:48,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1283, Invalid=2257, Unknown=0, NotChecked=0, Total=3540 [2021-12-15 10:52:48,362 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 172 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:48,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 224 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:52:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-15 10:52:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2021-12-15 10:52:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 166 states have internal predecessors, (170), 0 states have call successors, (0), 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 10:52:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2021-12-15 10:52:48,371 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 158 [2021-12-15 10:52:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:48,372 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2021-12-15 10:52:48,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 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 10:52:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2021-12-15 10:52:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-15 10:52:48,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:48,373 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:48,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-15 10:52:48,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:48,579 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1159694499, now seen corresponding path program 30 times [2021-12-15 10:52:48,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353818026] [2021-12-15 10:52:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:48,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1277 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:49,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:49,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353818026] [2021-12-15 10:52:49,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353818026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:49,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418788029] [2021-12-15 10:52:49,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:52:49,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:49,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:49,436 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:49,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-15 10:52:49,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-12-15 10:52:49,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:49,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-15 10:52:49,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1352 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:50,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1352 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:51,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418788029] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:51,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:51,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 86 [2021-12-15 10:52:51,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634748186] [2021-12-15 10:52:51,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:51,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-15 10:52:51,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-15 10:52:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5626, Unknown=0, NotChecked=0, Total=7310 [2021-12-15 10:52:51,196 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 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 10:52:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:52,416 INFO L93 Difference]: Finished difference Result 493 states and 552 transitions. [2021-12-15 10:52:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-15 10:52:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 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) Word has length 166 [2021-12-15 10:52:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:52,417 INFO L225 Difference]: With dead ends: 493 [2021-12-15 10:52:52,417 INFO L226 Difference]: Without dead ends: 279 [2021-12-15 10:52:52,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4645 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4680, Invalid=14502, Unknown=0, NotChecked=0, Total=19182 [2021-12-15 10:52:52,419 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 463 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:52,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 641 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 10:52:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-15 10:52:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 171. [2021-12-15 10:52:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 0 states have call successors, (0), 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 10:52:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2021-12-15 10:52:52,428 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 166 [2021-12-15 10:52:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:52,428 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2021-12-15 10:52:52,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 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 10:52:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2021-12-15 10:52:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-15 10:52:52,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:52,429 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:52,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:52,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-15 10:52:52,651 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:52,652 INFO L85 PathProgramCache]: Analyzing trace with hash -382690003, now seen corresponding path program 31 times [2021-12-15 10:52:52,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:52,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013137612] [2021-12-15 10:52:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:52,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 702 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:53,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:53,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013137612] [2021-12-15 10:52:53,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013137612] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:53,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380516505] [2021-12-15 10:52:53,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:52:53,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:53,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:53,079 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:53,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-15 10:52:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:53,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-15 10:52:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 756 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:53,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 756 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:53,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380516505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:53,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:53,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 34 [2021-12-15 10:52:53,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58058394] [2021-12-15 10:52:53,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:53,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 10:52:53,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 10:52:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 10:52:53,740 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 34 states, 34 states have (on average 5.676470588235294) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 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 10:52:54,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:54,217 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2021-12-15 10:52:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-15 10:52:54,218 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.676470588235294) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 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 170 [2021-12-15 10:52:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:54,219 INFO L225 Difference]: With dead ends: 188 [2021-12-15 10:52:54,219 INFO L226 Difference]: Without dead ends: 186 [2021-12-15 10:52:54,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1464, Invalid=2568, Unknown=0, NotChecked=0, Total=4032 [2021-12-15 10:52:54,220 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 219 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:54,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 254 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:52:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-15 10:52:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 179. [2021-12-15 10:52:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 0 states have call successors, (0), 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 10:52:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2021-12-15 10:52:54,231 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 170 [2021-12-15 10:52:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:54,232 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2021-12-15 10:52:54,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.676470588235294) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 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 10:52:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2021-12-15 10:52:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-15 10:52:54,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:54,233 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:54,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:54,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:54,451 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:54,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1796698643, now seen corresponding path program 32 times [2021-12-15 10:52:54,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171163130] [2021-12-15 10:52:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:54,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:52:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 1487 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:52:55,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:52:55,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171163130] [2021-12-15 10:52:55,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171163130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:52:55,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120471654] [2021-12-15 10:52:55,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:52:55,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:55,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:52:55,406 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:52:55,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-15 10:52:55,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:52:55,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:52:55,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-15 10:52:55,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:52:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 1566 proven. 756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:52:56,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:52:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 1566 proven. 756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 10:52:57,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120471654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:52:57,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:52:57,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 89 [2021-12-15 10:52:57,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947630468] [2021-12-15 10:52:57,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:52:57,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-15 10:52:57,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:52:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-15 10:52:57,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1773, Invalid=6059, Unknown=0, NotChecked=0, Total=7832 [2021-12-15 10:52:57,226 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 89 states, 89 states have (on average 3.348314606741573) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:52:58,037 INFO L93 Difference]: Finished difference Result 410 states and 470 transitions. [2021-12-15 10:52:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-15 10:52:58,038 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.348314606741573) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-12-15 10:52:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:52:58,039 INFO L225 Difference]: With dead ends: 410 [2021-12-15 10:52:58,039 INFO L226 Difference]: Without dead ends: 293 [2021-12-15 10:52:58,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3399, Invalid=10173, Unknown=0, NotChecked=0, Total=13572 [2021-12-15 10:52:58,040 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 461 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:52:58,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 654 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 10:52:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-15 10:52:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 181. [2021-12-15 10:52:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2021-12-15 10:52:58,052 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 178 [2021-12-15 10:52:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:52:58,052 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2021-12-15 10:52:58,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.348314606741573) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:52:58,052 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2021-12-15 10:52:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-15 10:52:58,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:52:58,053 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:52:58,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-15 10:52:58,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:52:58,267 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:52:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:52:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1983684472, now seen corresponding path program 33 times [2021-12-15 10:52:58,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:52:58,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359657838] [2021-12-15 10:52:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:52:58,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:52:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat