./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c --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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a76dc897aa0702a7581955a590e68a0e3d7c15bffbb5939a80772bf70ad5d7a --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:29:21,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:29:21,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:29:21,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:29:21,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:29:21,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:29:21,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:29:21,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:29:21,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:29:21,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:29:21,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:29:21,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:29:21,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:29:21,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:29:21,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:29:21,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:29:21,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:29:21,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:29:21,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:29:21,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:29:21,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:29:21,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:29:21,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:29:21,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:29:21,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:29:21,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:29:21,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:29:21,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:29:21,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:29:21,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:29:21,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:29:21,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:29:21,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:29:21,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:29:21,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:29:21,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:29:21,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:29:21,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:29:21,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:29:21,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:29:21,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:29:21,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:29:21,196 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:29:21,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:29:21,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:29:21,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:29:21,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:29:21,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:29:21,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:29:21,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:29:21,203 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:29:21,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:29:21,204 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:29:21,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:29:21,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:29:21,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:29:21,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:29:21,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:29:21,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:29:21,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:29:21,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:29:21,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:29:21,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:29:21,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:29:21,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:29:21,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:29:21,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:29:21,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:29:21,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:29:21,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:29:21,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:29:21,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:29:21,208 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:29:21,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:29:21,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:29:21,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:29:21,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a76dc897aa0702a7581955a590e68a0e3d7c15bffbb5939a80772bf70ad5d7a [2021-12-15 11:29:21,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:29:21,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:29:21,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:29:21,495 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:29:21,496 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:29:21,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-12-15 11:29:21,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744767050/b3db23b6e07d42bbb50d7391a2ca65fd/FLAGf7114a409 [2021-12-15 11:29:22,186 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:29:22,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-12-15 11:29:22,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744767050/b3db23b6e07d42bbb50d7391a2ca65fd/FLAGf7114a409 [2021-12-15 11:29:22,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744767050/b3db23b6e07d42bbb50d7391a2ca65fd [2021-12-15 11:29:22,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:29:22,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:29:22,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:29:22,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:29:22,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:29:22,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:29:22" (1/1) ... [2021-12-15 11:29:22,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fdaf3cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:22, skipping insertion in model container [2021-12-15 11:29:22,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:29:22" (1/1) ... [2021-12-15 11:29:22,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:29:22,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:29:22,959 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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[10634,10647] [2021-12-15 11:29:23,026 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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[25860,25873] [2021-12-15 11:29:23,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:29:23,258 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:29:23,312 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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[10634,10647] [2021-12-15 11:29:23,357 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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c[25860,25873] [2021-12-15 11:29:23,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:29:23,479 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:29:23,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23 WrapperNode [2021-12-15 11:29:23,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:29:23,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:29:23,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:29:23,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:29:23,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (1/1) ... [2021-12-15 11:29:23,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (1/1) ... [2021-12-15 11:29:23,590 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3564 [2021-12-15 11:29:23,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:29:23,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:29:23,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:29:23,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:29:23,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (1/1) ... [2021-12-15 11:29:23,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (1/1) ... [2021-12-15 11:29:23,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (1/1) ... [2021-12-15 11:29:23,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (1/1) ... [2021-12-15 11:29:23,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (1/1) ... [2021-12-15 11:29:23,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (1/1) ... [2021-12-15 11:29:23,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (1/1) ... [2021-12-15 11:29:23,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:29:23,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:29:23,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:29:23,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:29:23,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (1/1) ... [2021-12-15 11:29:23,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:29:23,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:29:23,737 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 11:29:23,747 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 11:29:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:29:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:29:23,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:29:23,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:29:24,010 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:29:24,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:29:25,450 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:29:25,461 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:29:25,461 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-15 11:29:25,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:29:25 BoogieIcfgContainer [2021-12-15 11:29:25,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:29:25,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:29:25,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:29:25,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:29:25,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:29:22" (1/3) ... [2021-12-15 11:29:25,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3751cb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:29:25, skipping insertion in model container [2021-12-15 11:29:25,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:23" (2/3) ... [2021-12-15 11:29:25,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3751cb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:29:25, skipping insertion in model container [2021-12-15 11:29:25,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:29:25" (3/3) ... [2021-12-15 11:29:25,471 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2021-12-15 11:29:25,475 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:29:25,476 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-15 11:29:25,516 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:29:25,522 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 11:29:25,522 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-15 11:29:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 705 states, 702 states have (on average 1.7834757834757835) internal successors, (1252), 704 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 11:29:25,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 11:29:25,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:25,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:25,563 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:25,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash -377035951, now seen corresponding path program 1 times [2021-12-15 11:29:25,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:25,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718518071] [2021-12-15 11:29:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:25,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:25,843 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 11:29:25,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:25,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718518071] [2021-12-15 11:29:25,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718518071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:25,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:25,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:29:25,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185775650] [2021-12-15 11:29:25,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:25,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:29:25,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:25,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:29:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:29:25,930 INFO L87 Difference]: Start difference. First operand has 705 states, 702 states have (on average 1.7834757834757835) internal successors, (1252), 704 states have internal predecessors, (1252), 0 states have call successors, (0), 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 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 11:29:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:26,064 INFO L93 Difference]: Finished difference Result 1069 states and 1856 transitions. [2021-12-15 11:29:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:29:26,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-15 11:29:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:26,087 INFO L225 Difference]: With dead ends: 1069 [2021-12-15 11:29:26,088 INFO L226 Difference]: Without dead ends: 846 [2021-12-15 11:29:26,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:29:26,100 INFO L933 BasicCegarLoop]: 1250 mSDtfsCounter, 631 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:26,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 2079 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:29:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-12-15 11:29:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 844. [2021-12-15 11:29:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.368171021377672) internal successors, (1152), 843 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states 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 11:29:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1152 transitions. [2021-12-15 11:29:26,198 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1152 transitions. Word has length 63 [2021-12-15 11:29:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:26,199 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1152 transitions. [2021-12-15 11:29:26,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 11:29:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1152 transitions. [2021-12-15 11:29:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:29:26,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:26,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:26,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:29:26,211 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash 714072948, now seen corresponding path program 1 times [2021-12-15 11:29:26,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387935677] [2021-12-15 11:29:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:26,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:26,368 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 11:29:26,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387935677] [2021-12-15 11:29:26,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387935677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:26,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:26,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:29:26,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676915893] [2021-12-15 11:29:26,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:26,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:29:26,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:29:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:29:26,375 INFO L87 Difference]: Start difference. First operand 844 states and 1152 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 11:29:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:26,521 INFO L93 Difference]: Finished difference Result 1471 states and 2026 transitions. [2021-12-15 11:29:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:29:26,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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) Word has length 64 [2021-12-15 11:29:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:26,527 INFO L225 Difference]: With dead ends: 1471 [2021-12-15 11:29:26,527 INFO L226 Difference]: Without dead ends: 1228 [2021-12-15 11:29:26,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:29:26,530 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 549 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:26,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 1683 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:29:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-12-15 11:29:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1224. [2021-12-15 11:29:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1222 states have (on average 1.3543371522094927) internal successors, (1655), 1223 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states 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 11:29:26,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1655 transitions. [2021-12-15 11:29:26,586 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1655 transitions. Word has length 64 [2021-12-15 11:29:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:26,586 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1655 transitions. [2021-12-15 11:29:26,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 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 11:29:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1655 transitions. [2021-12-15 11:29:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 11:29:26,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:26,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:26,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:29:26,594 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1908609010, now seen corresponding path program 1 times [2021-12-15 11:29:26,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:26,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854657916] [2021-12-15 11:29:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:26,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:26,739 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 11:29:26,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:26,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854657916] [2021-12-15 11:29:26,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854657916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:26,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:26,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:29:26,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616136681] [2021-12-15 11:29:26,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:26,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:29:26,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:26,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:29:26,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:29:26,742 INFO L87 Difference]: Start difference. First operand 1224 states and 1655 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 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 11:29:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:27,249 INFO L93 Difference]: Finished difference Result 2482 states and 3457 transitions. [2021-12-15 11:29:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:29:27,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 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) Word has length 64 [2021-12-15 11:29:27,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:27,257 INFO L225 Difference]: With dead ends: 2482 [2021-12-15 11:29:27,257 INFO L226 Difference]: Without dead ends: 1483 [2021-12-15 11:29:27,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:29:27,265 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 2604 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2604 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:27,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2604 Valid, 575 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 11:29:27,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-12-15 11:29:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1481. [2021-12-15 11:29:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1479 states have (on average 1.3955375253549696) internal successors, (2064), 1480 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states 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 11:29:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2064 transitions. [2021-12-15 11:29:27,337 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2064 transitions. Word has length 64 [2021-12-15 11:29:27,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:27,338 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 2064 transitions. [2021-12-15 11:29:27,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 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 11:29:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2064 transitions. [2021-12-15 11:29:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 11:29:27,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:27,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:27,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:29:27,341 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1292035188, now seen corresponding path program 1 times [2021-12-15 11:29:27,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:27,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913108149] [2021-12-15 11:29:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:27,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:27,389 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 11:29:27,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:27,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913108149] [2021-12-15 11:29:27,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913108149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:27,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:27,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:29:27,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349944964] [2021-12-15 11:29:27,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:27,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:29:27,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:29:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:29:27,392 INFO L87 Difference]: Start difference. First operand 1481 states and 2064 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:27,470 INFO L93 Difference]: Finished difference Result 2949 states and 4174 transitions. [2021-12-15 11:29:27,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:29:27,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-15 11:29:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:27,478 INFO L225 Difference]: With dead ends: 2949 [2021-12-15 11:29:27,478 INFO L226 Difference]: Without dead ends: 2074 [2021-12-15 11:29:27,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:29:27,481 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 578 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:27,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 1484 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:29:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-12-15 11:29:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2068. [2021-12-15 11:29:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2066 states have (on average 1.3799612778315586) internal successors, (2851), 2067 states have internal predecessors, (2851), 0 states have call successors, (0), 0 states 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 11:29:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 2851 transitions. [2021-12-15 11:29:27,583 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 2851 transitions. Word has length 65 [2021-12-15 11:29:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:27,585 INFO L470 AbstractCegarLoop]: Abstraction has 2068 states and 2851 transitions. [2021-12-15 11:29:27,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 2851 transitions. [2021-12-15 11:29:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 11:29:27,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:27,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:27,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:29:27,589 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1184582392, now seen corresponding path program 1 times [2021-12-15 11:29:27,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:27,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012222085] [2021-12-15 11:29:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:27,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:27,660 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 11:29:27,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:27,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012222085] [2021-12-15 11:29:27,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012222085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:27,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:27,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:29:27,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946294647] [2021-12-15 11:29:27,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:27,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:29:27,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:29:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:29:27,664 INFO L87 Difference]: Start difference. First operand 2068 states and 2851 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 11:29:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:27,803 INFO L93 Difference]: Finished difference Result 4442 states and 6243 transitions. [2021-12-15 11:29:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:29:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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) Word has length 66 [2021-12-15 11:29:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:27,816 INFO L225 Difference]: With dead ends: 4442 [2021-12-15 11:29:27,816 INFO L226 Difference]: Without dead ends: 3159 [2021-12-15 11:29:27,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:29:27,820 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 396 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:27,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 1441 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:29:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2021-12-15 11:29:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3155. [2021-12-15 11:29:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3153 states have (on average 1.3799555978433238) internal successors, (4351), 3154 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states 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 11:29:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 4351 transitions. [2021-12-15 11:29:27,973 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 4351 transitions. Word has length 66 [2021-12-15 11:29:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:27,973 INFO L470 AbstractCegarLoop]: Abstraction has 3155 states and 4351 transitions. [2021-12-15 11:29:27,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 11:29:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 4351 transitions. [2021-12-15 11:29:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-15 11:29:27,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:27,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:27,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:29:27,979 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash -237880367, now seen corresponding path program 1 times [2021-12-15 11:29:27,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:27,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134585857] [2021-12-15 11:29:27,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:27,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:28,049 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 11:29:28,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:28,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134585857] [2021-12-15 11:29:28,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134585857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:28,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:28,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:29:28,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085799545] [2021-12-15 11:29:28,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:28,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:29:28,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:28,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:29:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:29:28,053 INFO L87 Difference]: Start difference. First operand 3155 states and 4351 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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 11:29:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:28,494 INFO L93 Difference]: Finished difference Result 6802 states and 9465 transitions. [2021-12-15 11:29:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:29:28,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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) Word has length 66 [2021-12-15 11:29:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:28,509 INFO L225 Difference]: With dead ends: 6802 [2021-12-15 11:29:28,509 INFO L226 Difference]: Without dead ends: 3982 [2021-12-15 11:29:28,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:29:28,515 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 2272 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2272 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:28,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2272 Valid, 522 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 11:29:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3982 states. [2021-12-15 11:29:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3982 to 3966. [2021-12-15 11:29:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3966 states, 3964 states have (on average 1.3816851664984864) internal successors, (5477), 3965 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states 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 11:29:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3966 states to 3966 states and 5477 transitions. [2021-12-15 11:29:28,695 INFO L78 Accepts]: Start accepts. Automaton has 3966 states and 5477 transitions. Word has length 66 [2021-12-15 11:29:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:28,696 INFO L470 AbstractCegarLoop]: Abstraction has 3966 states and 5477 transitions. [2021-12-15 11:29:28,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 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 11:29:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3966 states and 5477 transitions. [2021-12-15 11:29:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:29:28,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:28,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:28,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:29:28,701 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:28,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:28,702 INFO L85 PathProgramCache]: Analyzing trace with hash 426192215, now seen corresponding path program 1 times [2021-12-15 11:29:28,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:28,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881203158] [2021-12-15 11:29:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:28,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:28,787 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 11:29:28,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:28,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881203158] [2021-12-15 11:29:28,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881203158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:28,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:28,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:29:28,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812368457] [2021-12-15 11:29:28,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:28,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 11:29:28,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:28,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 11:29:28,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:29:28,790 INFO L87 Difference]: Start difference. First operand 3966 states and 5477 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 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 11:29:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:29,923 INFO L93 Difference]: Finished difference Result 13636 states and 19360 transitions. [2021-12-15 11:29:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 11:29:29,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 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 67 [2021-12-15 11:29:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:29,975 INFO L225 Difference]: With dead ends: 13636 [2021-12-15 11:29:29,975 INFO L226 Difference]: Without dead ends: 12452 [2021-12-15 11:29:29,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:29:29,985 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 4810 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4810 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:29,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4810 Valid, 1029 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 11:29:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12452 states. [2021-12-15 11:29:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12452 to 3990. [2021-12-15 11:29:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3988 states have (on average 1.381394182547643) internal successors, (5509), 3989 states have internal predecessors, (5509), 0 states have call successors, (0), 0 states 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 11:29:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 5509 transitions. [2021-12-15 11:29:30,258 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 5509 transitions. Word has length 67 [2021-12-15 11:29:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:30,258 INFO L470 AbstractCegarLoop]: Abstraction has 3990 states and 5509 transitions. [2021-12-15 11:29:30,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 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 11:29:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 5509 transitions. [2021-12-15 11:29:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-15 11:29:30,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:30,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:30,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:29:30,264 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash -889016011, now seen corresponding path program 1 times [2021-12-15 11:29:30,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:30,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620569637] [2021-12-15 11:29:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:30,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:30,312 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 11:29:30,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:30,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620569637] [2021-12-15 11:29:30,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620569637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:30,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:30,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:29:30,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97771340] [2021-12-15 11:29:30,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:30,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:29:30,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:30,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:29:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:29:30,315 INFO L87 Difference]: Start difference. First operand 3990 states and 5509 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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 11:29:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:30,879 INFO L93 Difference]: Finished difference Result 9015 states and 12509 transitions. [2021-12-15 11:29:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:29:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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 67 [2021-12-15 11:29:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:30,892 INFO L225 Difference]: With dead ends: 9015 [2021-12-15 11:29:30,892 INFO L226 Difference]: Without dead ends: 5335 [2021-12-15 11:29:30,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:29:30,899 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 2344 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2344 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:30,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2344 Valid, 530 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 11:29:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5335 states. [2021-12-15 11:29:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5335 to 3990. [2021-12-15 11:29:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3988 states have (on average 1.376629889669007) internal successors, (5490), 3989 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states 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 11:29:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 5490 transitions. [2021-12-15 11:29:31,124 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 5490 transitions. Word has length 67 [2021-12-15 11:29:31,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:31,125 INFO L470 AbstractCegarLoop]: Abstraction has 3990 states and 5490 transitions. [2021-12-15 11:29:31,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 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 11:29:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 5490 transitions. [2021-12-15 11:29:31,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 11:29:31,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:31,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:31,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:29:31,130 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:31,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -132013379, now seen corresponding path program 1 times [2021-12-15 11:29:31,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:31,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90856688] [2021-12-15 11:29:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:31,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:31,178 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 11:29:31,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:31,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90856688] [2021-12-15 11:29:31,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90856688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:31,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:31,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:29:31,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652017327] [2021-12-15 11:29:31,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:31,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:29:31,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:31,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:29:31,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:29:31,181 INFO L87 Difference]: Start difference. First operand 3990 states and 5490 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:31,804 INFO L93 Difference]: Finished difference Result 8904 states and 12251 transitions. [2021-12-15 11:29:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:29:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-15 11:29:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:31,817 INFO L225 Difference]: With dead ends: 8904 [2021-12-15 11:29:31,817 INFO L226 Difference]: Without dead ends: 5195 [2021-12-15 11:29:31,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:29:31,826 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 2048 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2048 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:31,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2048 Valid, 487 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 11:29:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5195 states. [2021-12-15 11:29:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5195 to 5173. [2021-12-15 11:29:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5173 states, 5171 states have (on average 1.3612454070779347) internal successors, (7039), 5172 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states 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 11:29:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5173 states to 5173 states and 7039 transitions. [2021-12-15 11:29:32,126 INFO L78 Accepts]: Start accepts. Automaton has 5173 states and 7039 transitions. Word has length 68 [2021-12-15 11:29:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:32,127 INFO L470 AbstractCegarLoop]: Abstraction has 5173 states and 7039 transitions. [2021-12-15 11:29:32,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5173 states and 7039 transitions. [2021-12-15 11:29:32,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 11:29:32,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:32,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:32,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:29:32,132 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:32,133 INFO L85 PathProgramCache]: Analyzing trace with hash -416949424, now seen corresponding path program 1 times [2021-12-15 11:29:32,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:32,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938965261] [2021-12-15 11:29:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:32,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:32,194 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 11:29:32,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:32,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938965261] [2021-12-15 11:29:32,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938965261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:32,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:32,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:29:32,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389720067] [2021-12-15 11:29:32,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:32,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 11:29:32,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:32,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 11:29:32,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:29:32,197 INFO L87 Difference]: Start difference. First operand 5173 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:33,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:33,497 INFO L93 Difference]: Finished difference Result 18043 states and 24835 transitions. [2021-12-15 11:29:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 11:29:33,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-15 11:29:33,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:33,531 INFO L225 Difference]: With dead ends: 18043 [2021-12-15 11:29:33,531 INFO L226 Difference]: Without dead ends: 15526 [2021-12-15 11:29:33,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:29:33,539 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 4027 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4027 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:33,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4027 Valid, 942 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 11:29:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15526 states. [2021-12-15 11:29:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15526 to 5201. [2021-12-15 11:29:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5201 states, 5199 states have (on average 1.3608386228120792) internal successors, (7075), 5200 states have internal predecessors, (7075), 0 states have call successors, (0), 0 states 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 11:29:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5201 states to 5201 states and 7075 transitions. [2021-12-15 11:29:33,939 INFO L78 Accepts]: Start accepts. Automaton has 5201 states and 7075 transitions. Word has length 68 [2021-12-15 11:29:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:33,940 INFO L470 AbstractCegarLoop]: Abstraction has 5201 states and 7075 transitions. [2021-12-15 11:29:33,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 5201 states and 7075 transitions. [2021-12-15 11:29:33,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 11:29:33,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:33,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:33,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:29:33,947 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1441651372, now seen corresponding path program 1 times [2021-12-15 11:29:33,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:33,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241453876] [2021-12-15 11:29:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:33,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:34,021 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 11:29:34,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:34,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241453876] [2021-12-15 11:29:34,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241453876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:34,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:34,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:29:34,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162514809] [2021-12-15 11:29:34,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:34,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 11:29:34,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:34,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 11:29:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:29:34,025 INFO L87 Difference]: Start difference. First operand 5201 states and 7075 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 11:29:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:35,877 INFO L93 Difference]: Finished difference Result 22119 states and 30848 transitions. [2021-12-15 11:29:35,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 11:29:35,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-15 11:29:35,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:35,923 INFO L225 Difference]: With dead ends: 22119 [2021-12-15 11:29:35,923 INFO L226 Difference]: Without dead ends: 19883 [2021-12-15 11:29:35,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:29:35,937 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 4222 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4222 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:35,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4222 Valid, 1014 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 11:29:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19883 states. [2021-12-15 11:29:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19883 to 5298. [2021-12-15 11:29:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5298 states, 5296 states have (on average 1.3602719033232629) internal successors, (7204), 5297 states have internal predecessors, (7204), 0 states have call successors, (0), 0 states 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 11:29:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5298 states to 5298 states and 7204 transitions. [2021-12-15 11:29:36,533 INFO L78 Accepts]: Start accepts. Automaton has 5298 states and 7204 transitions. Word has length 69 [2021-12-15 11:29:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:36,533 INFO L470 AbstractCegarLoop]: Abstraction has 5298 states and 7204 transitions. [2021-12-15 11:29:36,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 11:29:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5298 states and 7204 transitions. [2021-12-15 11:29:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 11:29:36,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:36,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:36,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:29:36,540 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:36,541 INFO L85 PathProgramCache]: Analyzing trace with hash 756148337, now seen corresponding path program 1 times [2021-12-15 11:29:36,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:36,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147520346] [2021-12-15 11:29:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:36,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:36,764 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 11:29:36,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147520346] [2021-12-15 11:29:36,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147520346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:36,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:36,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 11:29:36,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765568241] [2021-12-15 11:29:36,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:36,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 11:29:36,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:36,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 11:29:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-15 11:29:36,767 INFO L87 Difference]: Start difference. First operand 5298 states and 7204 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 11:29:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:39,467 INFO L93 Difference]: Finished difference Result 18360 states and 25279 transitions. [2021-12-15 11:29:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 11:29:39,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 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 11:29:39,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:39,503 INFO L225 Difference]: With dead ends: 18360 [2021-12-15 11:29:39,503 INFO L226 Difference]: Without dead ends: 16715 [2021-12-15 11:29:39,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-12-15 11:29:39,515 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 2970 mSDsluCounter, 2100 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2970 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:39,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2970 Valid, 2661 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 11:29:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16715 states. [2021-12-15 11:29:39,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16715 to 5298. [2021-12-15 11:29:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5298 states, 5296 states have (on average 1.3598942598187311) internal successors, (7202), 5297 states have internal predecessors, (7202), 0 states have call successors, (0), 0 states 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 11:29:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5298 states to 5298 states and 7202 transitions. [2021-12-15 11:29:40,013 INFO L78 Accepts]: Start accepts. Automaton has 5298 states and 7202 transitions. Word has length 70 [2021-12-15 11:29:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:40,013 INFO L470 AbstractCegarLoop]: Abstraction has 5298 states and 7202 transitions. [2021-12-15 11:29:40,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 11:29:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5298 states and 7202 transitions. [2021-12-15 11:29:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-15 11:29:40,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:40,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:40,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:29:40,021 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash -223540144, now seen corresponding path program 1 times [2021-12-15 11:29:40,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:40,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428520043] [2021-12-15 11:29:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:40,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:40,231 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 11:29:40,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428520043] [2021-12-15 11:29:40,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428520043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:40,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:40,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:29:40,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580448307] [2021-12-15 11:29:40,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:40,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 11:29:40,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:40,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 11:29:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:29:40,234 INFO L87 Difference]: Start difference. First operand 5298 states and 7202 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 11:29:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:42,536 INFO L93 Difference]: Finished difference Result 20340 states and 28429 transitions. [2021-12-15 11:29:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 11:29:42,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 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 11:29:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:42,566 INFO L225 Difference]: With dead ends: 20340 [2021-12-15 11:29:42,567 INFO L226 Difference]: Without dead ends: 17252 [2021-12-15 11:29:42,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-12-15 11:29:42,580 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 2516 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2516 SdHoareTripleChecker+Valid, 2398 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:42,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2516 Valid, 2398 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1698 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 11:29:42,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17252 states. [2021-12-15 11:29:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17252 to 5294. [2021-12-15 11:29:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5294 states, 5292 states have (on average 1.3594104308390023) internal successors, (7194), 5293 states have internal predecessors, (7194), 0 states have call successors, (0), 0 states 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 11:29:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 7194 transitions. [2021-12-15 11:29:43,146 INFO L78 Accepts]: Start accepts. Automaton has 5294 states and 7194 transitions. Word has length 70 [2021-12-15 11:29:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:43,147 INFO L470 AbstractCegarLoop]: Abstraction has 5294 states and 7194 transitions. [2021-12-15 11:29:43,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states 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 11:29:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 5294 states and 7194 transitions. [2021-12-15 11:29:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 11:29:43,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:43,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:43,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:29:43,155 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash 66854135, now seen corresponding path program 1 times [2021-12-15 11:29:43,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670548223] [2021-12-15 11:29:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:43,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:43,511 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 11:29:43,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670548223] [2021-12-15 11:29:43,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670548223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:43,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:43,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-15 11:29:43,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484320109] [2021-12-15 11:29:43,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:43,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 11:29:43,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 11:29:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:29:43,514 INFO L87 Difference]: Start difference. First operand 5294 states and 7194 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:48,887 INFO L93 Difference]: Finished difference Result 40101 states and 56453 transitions. [2021-12-15 11:29:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-15 11:29:48,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-15 11:29:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:48,941 INFO L225 Difference]: With dead ends: 40101 [2021-12-15 11:29:48,941 INFO L226 Difference]: Without dead ends: 37015 [2021-12-15 11:29:48,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=293, Invalid=1039, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 11:29:48,954 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 5112 mSDsluCounter, 6217 mSDsCounter, 0 mSdLazyCounter, 2047 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5112 SdHoareTripleChecker+Valid, 6947 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:48,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5112 Valid, 6947 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2047 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 11:29:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37015 states. [2021-12-15 11:29:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37015 to 5288. [2021-12-15 11:29:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5286 states have (on average 1.358683314415437) internal successors, (7182), 5287 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 11:29:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 7182 transitions. [2021-12-15 11:29:49,680 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 7182 transitions. Word has length 71 [2021-12-15 11:29:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:49,681 INFO L470 AbstractCegarLoop]: Abstraction has 5288 states and 7182 transitions. [2021-12-15 11:29:49,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 7182 transitions. [2021-12-15 11:29:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 11:29:49,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:49,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:49,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:29:49,688 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:49,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1113625680, now seen corresponding path program 1 times [2021-12-15 11:29:49,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:49,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585450136] [2021-12-15 11:29:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:49,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:49,803 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 11:29:49,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:49,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585450136] [2021-12-15 11:29:49,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585450136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:49,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:49,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:29:49,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693860248] [2021-12-15 11:29:49,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:49,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 11:29:49,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:49,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 11:29:49,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-15 11:29:49,806 INFO L87 Difference]: Start difference. First operand 5288 states and 7182 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:52,174 INFO L93 Difference]: Finished difference Result 16290 states and 22720 transitions. [2021-12-15 11:29:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 11:29:52,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-15 11:29:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:52,193 INFO L225 Difference]: With dead ends: 16290 [2021-12-15 11:29:52,194 INFO L226 Difference]: Without dead ends: 13160 [2021-12-15 11:29:52,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-12-15 11:29:52,202 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 3477 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:52,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3477 Valid, 1821 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 11:29:52,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13160 states. [2021-12-15 11:29:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13160 to 5264. [2021-12-15 11:29:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5262 states have (on average 1.3574686431014824) internal successors, (7143), 5263 states have internal predecessors, (7143), 0 states have call successors, (0), 0 states 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 11:29:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 7143 transitions. [2021-12-15 11:29:52,826 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 7143 transitions. Word has length 71 [2021-12-15 11:29:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:52,826 INFO L470 AbstractCegarLoop]: Abstraction has 5264 states and 7143 transitions. [2021-12-15 11:29:52,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 7143 transitions. [2021-12-15 11:29:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 11:29:52,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:52,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:52,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:29:52,833 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:52,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash 468124592, now seen corresponding path program 1 times [2021-12-15 11:29:52,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:52,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439585614] [2021-12-15 11:29:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:52,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:53,099 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 11:29:53,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:53,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439585614] [2021-12-15 11:29:53,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439585614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:53,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:53,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-15 11:29:53,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980487217] [2021-12-15 11:29:53,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:53,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 11:29:53,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:53,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 11:29:53,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:29:53,101 INFO L87 Difference]: Start difference. First operand 5264 states and 7143 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:29:57,690 INFO L93 Difference]: Finished difference Result 31174 states and 43687 transitions. [2021-12-15 11:29:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 11:29:57,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-15 11:29:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:29:57,730 INFO L225 Difference]: With dead ends: 31174 [2021-12-15 11:29:57,730 INFO L226 Difference]: Without dead ends: 27888 [2021-12-15 11:29:57,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2021-12-15 11:29:57,741 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 5761 mSDsluCounter, 4648 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5761 SdHoareTripleChecker+Valid, 5496 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 11:29:57,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5761 Valid, 5496 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 11:29:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27888 states. [2021-12-15 11:29:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27888 to 5054. [2021-12-15 11:29:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5054 states, 5052 states have (on average 1.3596595407759304) internal successors, (6869), 5053 states have internal predecessors, (6869), 0 states have call successors, (0), 0 states 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 11:29:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 6869 transitions. [2021-12-15 11:29:58,510 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 6869 transitions. Word has length 71 [2021-12-15 11:29:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:29:58,511 INFO L470 AbstractCegarLoop]: Abstraction has 5054 states and 6869 transitions. [2021-12-15 11:29:58,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:29:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 6869 transitions. [2021-12-15 11:29:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-15 11:29:58,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:29:58,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:29:58,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:29:58,517 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:29:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:29:58,518 INFO L85 PathProgramCache]: Analyzing trace with hash 525454090, now seen corresponding path program 1 times [2021-12-15 11:29:58,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:29:58,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955471534] [2021-12-15 11:29:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:29:58,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:29:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:29:58,582 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 11:29:58,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:29:58,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955471534] [2021-12-15 11:29:58,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955471534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:29:58,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:29:58,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:29:58,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851339188] [2021-12-15 11:29:58,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:29:58,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 11:29:58,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:29:58,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 11:29:58,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:29:58,585 INFO L87 Difference]: Start difference. First operand 5054 states and 6869 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:30:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:30:02,257 INFO L93 Difference]: Finished difference Result 19136 states and 26590 transitions. [2021-12-15 11:30:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 11:30:02,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-15 11:30:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:30:02,280 INFO L225 Difference]: With dead ends: 19136 [2021-12-15 11:30:02,280 INFO L226 Difference]: Without dead ends: 17064 [2021-12-15 11:30:02,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:30:02,288 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 2842 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2842 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 11:30:02,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2842 Valid, 1088 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 11:30:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17064 states. [2021-12-15 11:30:03,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17064 to 5125. [2021-12-15 11:30:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5123 states have (on average 1.3601405426507907) internal successors, (6968), 5124 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states 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 11:30:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 6968 transitions. [2021-12-15 11:30:03,050 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 6968 transitions. Word has length 71 [2021-12-15 11:30:03,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:30:03,050 INFO L470 AbstractCegarLoop]: Abstraction has 5125 states and 6968 transitions. [2021-12-15 11:30:03,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:30:03,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 6968 transitions. [2021-12-15 11:30:03,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:30:03,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:30:03,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:30:03,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 11:30:03,057 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:30:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:30:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1951824160, now seen corresponding path program 1 times [2021-12-15 11:30:03,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:30:03,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766259911] [2021-12-15 11:30:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:30:03,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:30:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:30:03,404 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 11:30:03,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:30:03,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766259911] [2021-12-15 11:30:03,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766259911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:30:03,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:30:03,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-15 11:30:03,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052976892] [2021-12-15 11:30:03,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:30:03,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 11:30:03,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:30:03,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 11:30:03,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-15 11:30:03,406 INFO L87 Difference]: Start difference. First operand 5125 states and 6968 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:30:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:30:08,907 INFO L93 Difference]: Finished difference Result 27831 states and 39095 transitions. [2021-12-15 11:30:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 11:30:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-15 11:30:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:30:08,937 INFO L225 Difference]: With dead ends: 27831 [2021-12-15 11:30:08,937 INFO L226 Difference]: Without dead ends: 24664 [2021-12-15 11:30:08,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-12-15 11:30:08,944 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 3690 mSDsluCounter, 4993 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3690 SdHoareTripleChecker+Valid, 5872 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 11:30:08,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3690 Valid, 5872 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 11:30:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24664 states. [2021-12-15 11:30:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24664 to 5038. [2021-12-15 11:30:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5038 states, 5037 states have (on average 1.3575540996624975) internal successors, (6838), 5037 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states 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 11:30:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 6838 transitions. [2021-12-15 11:30:09,819 INFO L78 Accepts]: Start accepts. Automaton has 5038 states and 6838 transitions. Word has length 72 [2021-12-15 11:30:09,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:30:09,820 INFO L470 AbstractCegarLoop]: Abstraction has 5038 states and 6838 transitions. [2021-12-15 11:30:09,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:30:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5038 states and 6838 transitions. [2021-12-15 11:30:09,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 11:30:09,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:30:09,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:30:09,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 11:30:09,824 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:30:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:30:09,825 INFO L85 PathProgramCache]: Analyzing trace with hash 216436712, now seen corresponding path program 1 times [2021-12-15 11:30:09,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:30:09,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915055929] [2021-12-15 11:30:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:30:09,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:30:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:30:09,965 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 11:30:09,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:30:09,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915055929] [2021-12-15 11:30:09,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915055929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:30:09,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:30:09,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 11:30:09,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960923581] [2021-12-15 11:30:09,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:30:09,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 11:30:09,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:30:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 11:30:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-15 11:30:09,968 INFO L87 Difference]: Start difference. First operand 5038 states and 6838 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:30:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:30:14,709 INFO L93 Difference]: Finished difference Result 21687 states and 30264 transitions. [2021-12-15 11:30:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 11:30:14,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-15 11:30:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:30:14,738 INFO L225 Difference]: With dead ends: 21687 [2021-12-15 11:30:14,738 INFO L226 Difference]: Without dead ends: 18357 [2021-12-15 11:30:14,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-12-15 11:30:14,746 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 3611 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3611 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 11:30:14,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3611 Valid, 2230 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 11:30:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18357 states. [2021-12-15 11:30:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18357 to 4913. [2021-12-15 11:30:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4913 states, 4912 states have (on average 1.3574918566775245) internal successors, (6668), 4912 states have internal predecessors, (6668), 0 states have call successors, (0), 0 states 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 11:30:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 6668 transitions. [2021-12-15 11:30:15,604 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 6668 transitions. Word has length 72 [2021-12-15 11:30:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:30:15,604 INFO L470 AbstractCegarLoop]: Abstraction has 4913 states and 6668 transitions. [2021-12-15 11:30:15,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:30:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 6668 transitions. [2021-12-15 11:30:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 11:30:15,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:30:15,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:30:15,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 11:30:15,611 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:30:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:30:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash 701339809, now seen corresponding path program 1 times [2021-12-15 11:30:15,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:30:15,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685287524] [2021-12-15 11:30:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:30:15,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:30:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:30:15,920 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 11:30:15,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:30:15,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685287524] [2021-12-15 11:30:15,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685287524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:30:15,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:30:15,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-15 11:30:15,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423494508] [2021-12-15 11:30:15,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:30:15,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 11:30:15,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:30:15,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 11:30:15,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-15 11:30:15,922 INFO L87 Difference]: Start difference. First operand 4913 states and 6668 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:30:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:30:20,613 INFO L93 Difference]: Finished difference Result 17384 states and 24211 transitions. [2021-12-15 11:30:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 11:30:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-15 11:30:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:30:20,630 INFO L225 Difference]: With dead ends: 17384 [2021-12-15 11:30:20,630 INFO L226 Difference]: Without dead ends: 15296 [2021-12-15 11:30:20,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-12-15 11:30:20,634 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 3362 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3362 SdHoareTripleChecker+Valid, 3803 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 11:30:20,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3362 Valid, 3803 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 11:30:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15296 states. [2021-12-15 11:30:21,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15296 to 4913. [2021-12-15 11:30:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4913 states, 4912 states have (on average 1.357288273615635) internal successors, (6667), 4912 states have internal predecessors, (6667), 0 states have call successors, (0), 0 states 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 11:30:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 6667 transitions. [2021-12-15 11:30:21,562 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 6667 transitions. Word has length 73 [2021-12-15 11:30:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:30:21,562 INFO L470 AbstractCegarLoop]: Abstraction has 4913 states and 6667 transitions. [2021-12-15 11:30:21,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 12 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:30:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 6667 transitions. [2021-12-15 11:30:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 11:30:21,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:30:21,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:30:21,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 11:30:21,567 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:30:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:30:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash -39253326, now seen corresponding path program 1 times [2021-12-15 11:30:21,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:30:21,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989173154] [2021-12-15 11:30:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:30:21,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:30:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:30:21,604 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 11:30:21,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:30:21,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989173154] [2021-12-15 11:30:21,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989173154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:30:21,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:30:21,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:30:21,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002978292] [2021-12-15 11:30:21,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:30:21,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:30:21,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:30:21,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:30:21,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:30:21,607 INFO L87 Difference]: Start difference. First operand 4913 states and 6667 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 11:30:22,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:30:22,524 INFO L93 Difference]: Finished difference Result 7318 states and 10015 transitions. [2021-12-15 11:30:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:30:22,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-15 11:30:22,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:30:22,530 INFO L225 Difference]: With dead ends: 7318 [2021-12-15 11:30:22,530 INFO L226 Difference]: Without dead ends: 4915 [2021-12-15 11:30:22,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:30:22,535 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 328 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:30:22,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 1227 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:30:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2021-12-15 11:30:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 4913. [2021-12-15 11:30:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4913 states, 4912 states have (on average 1.346498371335505) internal successors, (6614), 4912 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states 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 11:30:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 6614 transitions. [2021-12-15 11:30:23,492 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 6614 transitions. Word has length 74 [2021-12-15 11:30:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:30:23,493 INFO L470 AbstractCegarLoop]: Abstraction has 4913 states and 6614 transitions. [2021-12-15 11:30:23,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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 11:30:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 6614 transitions. [2021-12-15 11:30:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 11:30:23,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:30:23,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:30:23,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 11:30:23,497 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:30:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:30:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash 753697715, now seen corresponding path program 1 times [2021-12-15 11:30:23,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:30:23,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382619999] [2021-12-15 11:30:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:30:23,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:30:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:30:23,526 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 11:30:23,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:30:23,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382619999] [2021-12-15 11:30:23,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382619999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:30:23,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:30:23,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:30:23,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910451410] [2021-12-15 11:30:23,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:30:23,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:30:23,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:30:23,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:30:23,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:30:23,529 INFO L87 Difference]: Start difference. First operand 4913 states and 6614 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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)